e10vq
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
Form 10-Q
 
     
þ   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended June 30, 2008
OR
     
o   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
Commission file number 1-32747
 
MARINER ENERGY, INC.
(Exact name of registrant as specified in its charter)
 
     
Delaware
(State or other jurisdiction of
incorporation or organization)
  86-0460233
(I.R.S. Employer
Identification Number)
One BriarLake Plaza, Suite 2000
2000 West Sam Houston Parkway South
Houston, Texas 77042

(Address of principal executive offices and zip code)
(713) 954-5500
(Registrant’s telephone number, including area code)
 
     Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes þ No o
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):
             
Large accelerated filer þ   Accelerated filer o   Non-accelerated filer o   Smaller reporting company o
        (Do not check if a smaller reporting company)    
     Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No þ
     As of August 5, 2008, there were 88,853,874 shares issued and outstanding of the issuer’s common stock, par value $0.0001 per share.
 
 

 


 

TABLE OF CONTENTS
         
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 Consent of Ryder Scott Company, L.P.
 Certification of CEO Pursuant to Section 302
 Certification of CFO Pursuant to Section 302
 Certification of CEO Pursuant to Section 1350
 Certification of CFO Pursuant to Section 1350

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PART I
Item 1. Consolidated Financial Statements
MARINER ENERGY, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS

(In thousands, except share data)
(Unaudited)
                 
    June 30,     December 31,  
    2008     2007  
Current Assets:
               
Cash and cash equivalents
  $ 41,269     $ 18,589  
Receivables, net of allowances of $2,637 and $2,449 as of June 30, 2008 and December 31, 2007, respectively
    289,214       157,774  
Insurance receivables
    10,800       26,683  
Derivative financial instruments
          11,863  
Intangible assets
    5,422       17,209  
Prepaid expenses and other
    14,906       10,630  
Deferred tax asset
    119,669       6,232  
 
           
Total current assets
    481,280       248,980  
Property and Equipment:
               
Proved oil and gas properties, full-cost method
    3,775,421       3,118,273  
Unproved properties, not subject to amortization
    126,853       40,455  
 
           
Total oil and gas properties
    3,902,274       3,158,728  
Other property and equipment
    66,258       15,545  
Accumulated depreciation, depletion and amortization
    (1,004,492 )     (754,079 )
 
           
Total property and equipment, net
    2,964,040       2,420,194  
Restricted Cash
          5,000  
Goodwill
    295,598       295,598  
Insurance Receivables
    28,145       56,924  
Derivative Financial Instruments
          691  
Other Assets, net of amortization
    62,166       56,248  
 
           
TOTAL ASSETS
  $ 3,831,229     $ 3,083,635  
 
           
Current Liabilities:
               
Accounts payable
  $ 18,090     $ 1,064  
Accrued liabilities
    135,661       96,936  
Accrued capital costs
    210,510       159,010  
Abandonment liability
    52,421       30,985  
Accrued interest
    9,848       7,726  
Derivative financial instruments
    333,416       19,468  
 
           
Total current liabilities
    759,946       315,189  
Long-Term Liabilities:
               
Abandonment liability
    208,430       191,021  
Deferred income tax
    420,885       343,948  
Derivative financial instruments
    102,459       25,343  
Long-term debt, bank credit facility
    350,000       179,000  
Long-term debt, senior unsecured notes
    600,000       600,000  
Other long-term liabilities
    54,656       38,115  
 
           
Total long-term liabilities
    1,736,430       1,377,427  
 
               
Commitments and Contingencies (see Note 8)
               
 
               
Minority Interest
    189       1  
 
               
Stockholders’ Equity:
               
Preferred stock, $.0001 par value; 20,000,000 shares authorized, no shares issued and outstanding at June 30, 2008 and December 31, 2007
           
Common stock, $.0001 par value; 180,000,000 shares authorized, 88,820,553 shares issued and outstanding at June 30, 2008; 180,000,000 shares authorized, 87,229,312 shares issued and outstanding at December 31, 2007
    9       9  
Additional paid-in capital
    1,057,787       1,054,089  
Accumulated other comprehensive loss
    (278,144 )     (22,576 )
Accumulated retained earnings
    555,012       359,496  
 
           
Total stockholders’ equity
    1,334,664       1,391,018  
 
           
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY
  $ 3,831,229     $ 3,083,635  
 
           
The accompanying notes are an integral part of these consolidated financial statements

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MARINER ENERGY, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except share data)
(Unaudited)
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2008     2007     2008     2007  
Revenues:
                               
Natural gas
  $ 250,278     $ 134,082     $ 429,901     $ 274,614  
Oil
    144,556       66,678       258,170       127,129  
Natural gas liquids
    33,057       11,413       54,038       20,562  
Other revenues
    1,561       908       3,240       2,381  
 
                       
Total revenues
    429,452       213,081       745,349       424,686  
 
                       
 
                               
Costs and Expenses:
                               
Lease operating expense
    55,315       38,601       100,147       72,072  
Severance and ad valorem taxes
    5,263       2,888       9,873       5,878  
Transportation expense
    4,197       1,403       7,216       3,305  
General and administrative expense
    14,360       12,878       26,286       24,054  
Depreciation, depletion and amortization
    141,454       93,799       260,772       192,655  
Other miscellaneous expense
    677       294       1,214       462  
 
                       
Total costs and expenses
    221,266       149,863       405,508       298,426  
 
                       
OPERATING INCOME
    208,186       63,218       339,841       126,260  
Other Income (Expense):
                               
Interest income
    281       231       607       522  
Interest expense, net of amounts capitalized
    (17,563 )     (13,873 )     (36,134 )     (26,220 )
Other income (expense)
          (373 )           5,058  
 
                       
Income Before Taxes and Minority Interest
    190,904       49,203       304,314       105,620  
Provision for Income Taxes
    (67,416 )     (16,245 )     (108,610 )     (34,455 )
Minority Interest Expense
    (98 )           (188 )      
 
                       
NET INCOME
  $ 123,390     $ 32,958     $ 195,516     $ 71,165  
 
                       
 
                               
Earnings per share:
                               
Net income per share—basic
  $ 1.40     $ 0.38     $ 2.23     $ 0.83  
Net income per share—diluted
  $ 1.39     $ 0.38     $ 2.21     $ 0.83  
Weighted average shares outstanding—basic
    87,983,902       85,627,433       87,638,816       85,585,072  
Weighted average shares outstanding—diluted
    88,828,904       85,905,296       88,430,344       85,767,175  
The accompanying notes are an integral part of these consolidated financial statements

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MARINER ENERGY, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)
(Unaudited)
                 
    Six Months  
    Ended June 30,  
    2008     2007  
Operating Activities:
               
Net income
  $ 195,516     $ 71,165  
Adjustments to reconcile net income to net cash provided by operating activities:
               
Allowance for doubtful receivables
    188       (840 )
Deferred income tax
    105,075       34,205  
Depreciation, depletion and amortization
    260,772       192,655  
Amortization of deferred financing costs
    1,466       1,272  
Ineffectiveness of derivative instruments
    6,474       2,047  
Share-based compensation
    7,172       3,414  
Minority interest
    188        
Changes in operating assets and liabilities:
               
Receivables
    (131,078 )     (15,087 )
Insurance receivables
    57,083       (20,125 )
Prepaid expenses and other
    (62 )     (2,172 )
Accounts payable and accrued liabilities
    48,686       17,363  
 
           
Net cash provided by operating activities
    551,480       283,897  
 
           
Investing Activities:
               
Acquisitions and additions to oil and gas properties
    (652,910 )     (256,494 )
Additions to other property and equipment
    (48,605 )     (906 )
Property conveyances
          1,103  
Restricted cash designated for investment
    5,000       31,830  
 
           
Net cash used in investing activities
    (696,515 )     (224,467 )
 
           
Financing Activities:
               
Credit facility borrowings
    630,000       142,000  
Credit facility repayments
    (459,000 )     (496,000 )
Proceeds from note offering
          300,000  
Deferred offering costs
          (6,491 )
Repurchase of stock
    (4,014 )      
Proceeds from exercise of stock options
    729       629  
 
           
Net cash provided by (used in) financing activities
    167,715       (59,862 )
 
           
Increase (Decrease) in Cash and Cash Equivalents
    22,680       (432 )
Cash and Cash Equivalents at Beginning of Period
    18,589       9,579  
 
           
Cash and Cash Equivalents at End of Period
  $ 41,269     $ 9,147  
 
           
 
               
Supplemental Disclosure of Cash Flow Information:
               
Cash paid during the year for:
               
Interest, net of amount capitalized
  $ 31,101     $ 20,808  
Income taxes, net of refunds
  $ 1,100     $ 250  
The accompanying notes are an integral part of these consolidated financial statements

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MARINER ENERGY, INC. AND SUBSIDIARIES
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS
(Unaudited)
1. Summary of Significant Accounting Policies
     Operations — Mariner Energy, Inc. (“Mariner” or “the Company”) is an independent oil and gas exploration, development and production company with principal operations in West Texas and in the Gulf of Mexico, both shelf and deepwater. Unless otherwise indicated, references to “Mariner”, “the Company”, “we”, “our”, “ours” and “us” refer to Mariner Energy, Inc. and its subsidiaries collectively.
     Interim Financial Statements — The accompanying unaudited consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in conformity with generally accepted accounting principles in the United States of America (“GAAP”) have been condensed or omitted pursuant to SEC rules and regulations. In the opinion of management, all adjustments (consisting of a normal and recurring nature) considered necessary for a fair presentation have been included. Operating results for interim periods are not necessarily indicative of the results that may be expected for the entire year. The unaudited consolidated financial statements included herein should be read in conjunction with the Financial Statements and Notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007.
     Use of Estimates — The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Our most significant financial estimates are based on remaining proved natural gas and oil reserves. Estimates of proved reserves are key components of our depletion rate for natural gas and oil properties, our unevaluated properties and our full cost ceiling test. In addition, estimates are used in computing taxes, preparing accruals of operating costs and production revenues, asset retirement obligations, fair value and effectiveness of derivative instruments and fair value of stock options and the related compensation expense. Because of the inherent nature of the estimation process, actual results could differ materially from these estimates.
     Principles of Consolidation — Our consolidated financial statements as of June 30, 2008 and December 31, 2007 include our accounts and the accounts of our subsidiaries. All inter-company balances and transactions have been eliminated.
     Reclassifications — Certain prior year amounts have been reclassified to conform to current year presentation. These reclassifications had no effect on total operating income or net income. Amounts for producing overhead recovery were presented as General and administrative expense in the Company’s Consolidated Statements of Operations for the three and six months ended June 30, 2007. These amounts are presented herein as Lease operating expense for comparability to 2008 presentation.
     Income Taxes — Our provision for taxes includes both federal and state taxes. The Company records its federal income taxes using an asset and liability approach which results in the recognition of deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the book carrying amounts and the tax bases of assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences and carryforwards are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are established when necessary to reduce deferred tax assets to the amount more likely than not to be recovered.
     There were no uncertain tax positions during the six months ended June 30, 2008. For a detail of the Company’s uncertain positions, please refer to Note 9, “Income Taxes” to the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007.

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     Recent Accounting Pronouncements — In May 2008, the Financial Accounting Standards Board (“FASB”) issued Statement of Financial Accounting Standards (“SFAS”) No. 162, “The Hierarchy of Generally Accepted Accounting Principles” (“SFAS No. 162”). SFAS No. 162 is intended to improve financial reporting by identifying a consistent framework, or hierarchy, for selecting accounting principles to be used in preparing financial statements that are presented in conformity with GAAP for nongovernmental entities. The FASB believes that the GAAP hierarchy should be directed to entities because it is the entity (not its auditor) that is responsible for selecting accounting principles for financial statements that are presented in conformity with GAAP. The Company does not expect the adoption of SFAS No. 162 to have a material effect on its results of operations or financial position.
     In April 2008, the FASB issued Staff Position (“FSP”) No. 142-3, “Determination of the Useful Life of Intangible Assets” (“FSP 142-3”). FSP 142-3 amends the factors that should be considered in developing renewal or extension assumptions used to determine the useful life of a recognized intangible asset under FASB Statement No. 142, “Goodwill and Other Intangible Assets.” FSP 142-3 is effective for financial statements issued after December 15, 2008. The Company does not expect the adoption of FSP 142-3 to have a material effect on its results of operations or financial position.
     In March 2008, the FASB issued SFAS No. 161, “Disclosures about Derivative Instruments and Hedging Activities—an amendment of FASB Statement No. 133” (“SFAS 161”). SFAS 161 is intended to improve financial reporting about derivative instruments and hedging activities by requiring enhanced disclosures to enable investors to better understand their effects on an entity’s financial position, financial performance, and cash flows. SFAS 161 is effective for financial statements issued for fiscal years and interim periods beginning after November 15, 2008, with early application encouraged. SFAS 161 also improves transparency about the location and amounts of derivative instruments in an entity’s financial statements; how derivative instruments and related hedged items are accounted for under SFAS No. 133, “Accounting for Derivative Instruments and Hedging Activities” (“SFAS 133”); and how derivative instruments and related hedged items affect its financial position, financial performance, and cash flows. SFAS 161 achieves these improvements by requiring disclosure of the fair values of derivative instruments and their gains and losses in a tabular format. It also provides more information about an entity’s liquidity by requiring disclosure of derivative features that are credit-risk related. Finally, it requires cross-referencing within footnotes to enable financial statement users to locate important information about derivative instruments. The Company is currently evaluating the provisions of SFAS 161.
     In December 2007, the FASB issued SFAS No. 141(R), “Business Combinations” (“SFAS 141(R)”), which replaces SFAS 141. SFAS 141(R) establishes principles and requirements for how an acquirer recognizes and measures in its financial statements the identifiable assets acquired, the liabilities assumed, any non-controlling interest in the acquiree and the goodwill acquired. The Statement also establishes disclosure requirements which will enable users to evaluate the nature and financial effects of the business combination. SFAS 141(R) is effective for fiscal years beginning after December 15, 2008. The adoption of SFAS 141(R) will have an impact on accounting for business combinations with the effect dependent upon acquisitions at that time.
     In December 2007, the FASB issued SFAS No. 160, “Noncontrolling Interests in Consolidated Financial Statements — an amendment of Accounting Research Bulletin No. 51” (“SFAS 160”), which establishes accounting and reporting standards for ownership interests in subsidiaries held by parties other than the parent, the amount of consolidated net income attributable to the parent and to the noncontrolling interest, changes in a parent’s ownership interest and the valuation of retained non-controlling equity investments when a subsidiary is deconsolidated. The Statement also establishes reporting requirements that provide sufficient disclosures that clearly identify and distinguish between the interests of the parent and the interests of the non-controlling owners. SFAS 160 is effective for fiscal years beginning after December 15, 2008. The Company has not determined the effect that the application of SFAS 160 will have on its consolidated financial statements.
     In April 2007, the FASB issued FASB Interpretation No. 39-1, “Amendment of FASB Interpretation No. 39” (“FIN 39-1”), which addresses certain modifications to FASB Interpretation No. 39, “Offsetting of Amounts Related to Certain Contracts,” and whether a reporting entity that is party to a master netting arrangement can offset fair value amounts recognized for the right to reclaim or obligation to return cash collateral against fair value amounts recognized for derivative instruments that have been offset under the same master netting arrangement in accordance with Interpretation 39. FIN 39-1 is effective for fiscal years beginning after November 15, 2007. The provisions of FIN 39-1 were consistent with the Company’s accounting practice. The adoption of FIN 39-1 did not impact the consolidated financial statements of the Company.

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     During February 2007, the FASB issued SFAS No 159, “The Fair Value Option for Financial Assets and Financial Liabilities” (“SFAS 159”). SFAS 159 permits entities to choose to measure many financial instruments and certain other items at fair value that are not currently required to be measured at fair value, and thereby mitigate volatility in reported earnings caused by measuring related assets and liabilities differently without having to apply complex hedge accounting provisions. This Statement also establishes presentation and disclosure requirements designed to facilitate comparisons between entities that choose different measurement attributes for similar types of assets and liabilities. SFAS 159 is effective for the Company as of January 1, 2008. SFAS 159 did not have an impact on the Company’s Consolidated Financial Statements as the Company elected not to measure at fair value additional financial assets and liabilities not already required to be measured at fair value.
     In September 2006, the FASB issued SFAS No. 157, “Fair Value Measurements” (“SFAS 157”), which establishes guidelines for measuring fair value and expands disclosures regarding fair value measurements. SFAS 157 does not require any new fair value measurements but rather it eliminates inconsistencies in the guidance found in various prior accounting pronouncements. SFAS 157 was effective for fiscal years beginning after November 15, 2007. In February 2008, the FASB issued FSP No. FAS 157-2, “Effective Date of FASB Statement No. 157,” which delayed the effective date of SFAS 157 for nonfinancial assets and nonfinancial liabilities, except for items that are recognized or disclosed at fair value in the financial statements on a recurring basis (at least annually). This FSP is effective for financial statements issued during fiscal years beginning after November 15, 2008, and interim periods within those fiscal years for items within the scope of this FSP. Accordingly, our adoption of SFAS 157 was limited to financial assets and liabilities, which primarily affects the valuation of the Company’s derivative contracts. The adoption of SFAS 157 with respect to financial assets and liabilities did not have a material impact on our net asset values (see Note 11). The Company is still in the process of evaluating SFAS 157 with respect to its effect on nonfinancial assets and liabilities and therefore has not yet determined the impact that it will have on its financial statements upon full adoption in 2009. Nonfinancial assets and liabilities for which the Company has not applied the provisions of SFAS 157 include its asset retirement obligations and assets held for future sale.
2. Acquisitions and Dispositions
     Gulf of Mexico Shelf Acquisition. On January 31, 2008, Mariner acquired 100% of the equity in a subsidiary of Hydro Gulf of Mexico, Inc. pursuant to a Membership Interest Purchase Agreement executed on December 23, 2007. The acquired subsidiary, now known as Mariner Gulf of Mexico LLC (“MGOM”), was an indirect subsidiary of StatoilHydro ASA and owns substantially all of its former Gulf of Mexico shelf operations. Mariner paid approximately $243.0 million, subject to customary purchase price adjustments, including $8.0 million for reimbursement of drilling costs attributable to the High Island 166 #5 well. The acquisition was financed by borrowing under Mariner’s bank credit facility.
     Pro Forma Financial Information — The pro forma information set forth below gives effect to the acquisition of MGOM as if it had been consummated as of the beginning of the applicable period. The pro forma information has been derived from the historical Consolidated Financial Statements of the Company and the statements of revenues and direct operating expenses of MGOM. The pro forma information is for illustrative purposes only. The financial results may have been different had MGOM been an independent company and had the companies always been combined. You should not rely on the pro forma financial information as being indicative of the historical results that would have been achieved had the acquisition occurred in the past or the future financial results that the Company will achieve after the acquisition.
                                 
    For the Three Months Ended   For the Six Months Ended
    June 30,   June 30,
    2008   2007   2008   2007
    (In thousands, except per share amounts)
Pro Forma:
                               
Revenue
  $ 429,168     $ 276,539     $ 760,042     $ 542,860  
Net income available to common stockholders
  $ 123,443     $ 47,151     $ 199,071     $ 95,132  
Basic earnings per share
  $ 1.40     $ 0.55     $ 2.27     $ 1.11  
Diluted earnings per share
  $ 1.39     $ 0.55     $ 2.25     $ 1.11  
     West Texas Acquisitions. On December 31, 2007 and February 29, 2008, Mariner acquired additional working interests in certain of its existing properties in the Spraberry field in the Permian Basin. Mariner operates

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substantially all of the assets. The purchase price, subject to customary purchase price adjustments, for the December 2007 acquisition was approximately $122.5 million, which Mariner financed under its bank credit facility, and for the February 2008 acquisition was approximately $21.7 million which Mariner funded with cash flow from operations.
     Interest in Cottonwood — On December 1, 2006, Mariner completed the sale of its 20% interest in Garden Banks 244 (Cottonwood) to Petrobras America, Inc., for $31.8 million. The sale was effective November 1, 2006. Proceeds from the sale were deposited in trust with a qualified intermediary to preserve Mariner’s ability to reinvest them in a tax-deferred, like-kind exchange transaction for federal income tax purposes. Inasmuch as Mariner elected not to identify replacement like-kind property to facilitate the exchange, proceeds and related interest totaling $32.0 million were disbursed to Mariner on January 19, 2007 and used to repay borrowings under its bank credit facility. No gain was recorded for book purposes on this disposition.
3. Long-Term Debt
     Bank Credit Facility — On June 2, 2008, the Company’s secured bank credit facility was amended to increase the borrowing base to $850.0 million. On January 31, 2008, the credit facility was amended to:
    increase the facility’s maximum credit availability to $1.0 billion, including up to $50.0 million in letters of credit,
 
    fix the borrowing base at $750.0 million as of January 31, 2008,
 
    extend the facility’s term to January 31, 2012,
 
    terminate a dedicated $40.0 million letter of credit facility due to Mariner’s satisfaction of its obligations under a drill-to-earn program, and
 
    add as a permitted use of loan proceeds the funding of Mariner’s purchase of MGOM.
     The Company’s payment and performance of its obligations under the bank credit facility (including any obligations under commodity and interest rate hedges entered into with facility lenders) are secured by liens upon substantially all of the assets of the Company and its subsidiaries. Borrowings under the bank credit facility bear interest at either a LIBOR-based rate or a prime-based rate, at the Company’s option, plus a specified margin.
     As of June 30, 2008 and December 31, 2007, $350.0 million and $179.0 million, respectively, was outstanding under the bank credit facility and the interest rate was 3.70% and 7.25%, respectively. In addition, as of June 30, 2008, four letters of credit totaling $4.7 million were outstanding, of which $4.2 million was required for plugging and abandonment obligations at certain of the Company’s offshore fields.
     The bank credit facility contains various restrictive covenants and other usual and customary terms and conditions, including limitations on the payment of cash dividends and other restricted payments, the incurrence of additional debt, the sale of assets, and speculative hedging. The Company was in compliance with the financial covenants under the bank credit facility as of June 30, 2008.
     The Company must pay a commitment fee of 0.250% to 0.375% per year on the unused availability under the bank credit facility. As of June 30, 2008, the Company had $495.3 million of borrowings available under the credit facility.
     Senior Notes — In 2007, the Company sold and issued $300.0 million aggregate principal amount of its 8% Senior Notes due 2017 (the “8% Notes”). In 2006, the Company sold and issued $300.0 million aggregate principal amount of its 71/2% Senior Notes due 2013 (the “71/2% Notes” and together with the 8% Notes, the “Notes”). The Notes are senior unsecured obligations of the Company. The 8% Notes mature on May 15, 2017 with interest payable on May 15 and November 15 of each year. The 71/2% Notes mature on April 15, 2013 with interest payable on April 15 and October 15 of each year. There is no sinking fund for the Notes. The Company and its restricted subsidiaries are subject to certain financial and non-financial covenants under each of the indentures governing the Notes.

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     Capitalized Interest — For the three-month periods ended June 30, 2008 and 2007, capitalized interest totaled $0.7 million and $0.1 million, respectively. For the six-month periods ended June 30, 2008 and 2007, capitalized interest totaled $0.9 million and $0.3 million, respectively.
4. Oil and Gas Properties
     Mariner’s oil and gas properties are accounted for using the full-cost method of accounting. All direct costs and certain indirect costs associated with the acquisition, exploration and development of oil and gas properties are capitalized, including certain general and administrative expenses (“G&A”). For the three-month periods ended June 30, 2008 and 2007, capitalized G&A totaled $5.1 million and $2.3 million, respectively. For the six-month periods ended June 30, 2008 and 2007, capitalized G&A totaled $9.7 million and $4.5 million, respectively. Amortization of oil and gas properties is calculated using the unit-of-production method based on estimated proved oil and gas reserves.
     GAAP requires that a quarterly full-cost ceiling limitation calculation be performed whereby net capitalized costs related to proved and unproved properties, less related deferred income taxes, may not exceed a ceiling limitation. The ceiling limitation is the amount equal to the present value discounted at 10% of estimated future net revenues from estimated proved reserves plus the lower of cost or fair value of unproved properties less estimated future production and development costs, all net of related income tax effect. The full-cost ceiling limitation is calculated using natural gas and oil prices in effect as of the balance sheet date and is adjusted for “basis” or location differential. Price is held constant over the life of the reserves. The Company uses derivative financial instruments that qualify for cash flow hedge accounting under SFAS 133 to hedge against the volatility of oil and natural gas prices and, in accordance with SEC guidelines, the Company includes estimated future cash flows from its hedging program in its ceiling test calculation. If net capitalized costs, less related deferred income taxes, were to exceed the ceiling limitation, the excess would be impaired and a permanent write-down would be recorded in the Consolidated Statements of Operations.
Additional guidance was provided in Staff Accounting Bulletin No. 47, Topic 12(D)(c)(3), primarily regarding the use of cash flow hedges, asset retirement obligations, and the effect of subsequent events on the ceiling test calculation. Mariner had no write downs due to the ceiling test for the current quarter.
5. Accrual for Future Abandonment Liabilities
     SFAS No. 143, “Accounting for Asset Retirement Obligations” (“SFAS 143”), addresses accounting and reporting for obligations associated with the retirement of tangible long-lived assets and the associated asset retirement costs. The Company adopted SFAS No. 143 on January 1, 2003. SFAS No. 143 requires that the fair value of a liability for an asset’s retirement obligation be recorded in the period in which it is incurred and the corresponding cost capitalized by increasing the carrying amount of the related long-lived asset. The liability is accreted to its then present value each period, and the capitalized cost is depreciated over the useful life of the related asset.
     To estimate the fair value of an asset retirement obligation, the Company employs a present value technique, which reflects certain assumptions, including the Company’s credit-adjusted risk-free interest rate, the estimated settlement date of the liability and the estimated current cost to settle the liability. Changes in timing or to the original estimate of cash flows will result in changes to the carrying amount of the liability.
     The following roll forward is provided as a reconciliation of the beginning and ending aggregate carrying amounts of the asset retirement obligation.
         
    (In thousands)  
Abandonment liability as of December 31, 2007 (1)
  $ 222,006  
Liabilities Incurred
    6,364  
Liabilities Settled
    (25,179 )
Accretion Expense
    10,359  
Revisions to previous estimates
    2,881  
Liabilities from assets acquired
    44,420  
 
     
Abandonment liability as of June 30, 2008 (2)
  $ 260,851  
 
     
 
(1)   Includes $31.0 million classified as a current liability at December 31, 2007.

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(2)   Includes $52.4 million classified as a current liability at June 30, 2008.
6. Stockholders’ Equity
     Mariner recorded compensation expense related to restricted stock and stock options of $4.6 million and $1.8 million for the three-month periods ended June 30, 2008 and 2007, respectively, and $7.2 million and $3.4 million for the six-month periods ended June 30, 2008 and 2007, respectively. Unrecognized compensation expense at June 30, 2008 was $74.5 million for the unvested portion of restricted stock granted under its Stock Incentive Plan, as amended and restated from time to time (the “Stock Incentive Plan”), and $151,000 for unvested options, of which $4,000 was attributable to unvested options granted under the Stock Incentive Plan and $148,000 was attributable to unvested rollover options granted in connection with a March 2006 merger transaction.
     The following table presents a summary of stock option activity under the Stock Incentive Plan and under rollover options granted for the six months ended June 30, 2008.
                         
            Weighted        
            Average        
            Exercise     Aggregate  
    Shares     Price     IntrinsicValue (1)  
                    (In thousands)  
Outstanding at beginning of year
    720,488     $ 13.82     $ 16,679  
Granted
                 
Exercised (2)
    (55,160 )     13.21       (1,311 )
Forfeited
    (18,000 )     14.00       (413 )
 
                   
Outstanding at June 30, 2008
    647,328       13.87     $ 14,955  
 
                   
 
(1)   Based upon the difference between the closing price of the common stock on the last trading date of the quarter ($36.97) and the option exercise price of in-the-money options.
 
(2)   Options were exercised for cash proceeds of approximately $729,000.
     A summary of the activity for unvested restricted stock awards under the Stock Incentive Plan as of June 30, 2008 and 2007, respectively, and changes during the six-month periods is as follows:
                 
    Restricted Shares under  
    Stock Incentive Plan  
    June 30,  
    2008     2007  
Total unvested shares at beginning of period: January 1
    1,484,552       875,380  
Shares granted (1)
    1,683,316       799,694  
Shares vested
    (432,606 )     (207,053 )
Shares forfeited
    (17,214 )     (24,266 )
 
           
Total unvested shares at end of period: June 30
    2,718,048       1,443,755  
 
           
Available for future grant as options or restricted stock
    2,554,720       4,146,100  
 
(1)   Current year activity includes 1,083,493 shares granted in June 2008 under the Stock Incentive Plan’s 2008 Long-Term Performance-Based Restricted Stock Program. Vesting of these shares is contingent and begins upon satisfaction of specified thresholds for the market price of Mariner’s common stock, assuming, in most instances, continued employment by Mariner.
7. Derivative Financial Instruments and Hedging Activities
     The energy markets historically have been very volatile, and Mariner can reasonably expect that oil and gas prices will be subject to wide fluctuations in the future. In an effort to reduce the effects of the volatility of the price of oil and natural gas on the Company’s operations, management has elected to hedge oil and natural gas prices from time to time through the use of commodity price swap agreements and costless collars. While the use of these hedging arrangements limits the downside risk of adverse price movements, it also limits future gains from favorable movements. In addition, forward price curves and estimates of future volatility are used to assess and measure the ineffectiveness of Mariner’s open contracts at the end of each period. If open contracts cease to qualify for hedge accounting, the mark-to-market change in fair value is recognized in oil and natural gas revenue. Loss of hedge accounting and cash flow designation will cause volatility in earnings. The fair values Mariner reports in its

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financial statements change as estimates are revised to reflect actual results, changes in market conditions or other factors, many of which are beyond Mariner’s control.
     The effects on Mariner’s oil and natural gas revenues from its hedging activities were as follows:
                                 
    Three Months Ended June 30,     Six Months Ended June 30,  
    2008     2007     2008     2007  
            (In thousands)          
Cash (Loss) Gain on Settlements
  $ (64,607 )   $ 6,868     $ (74,914 )   $ 30,490  
(Loss) Gain on Hedge Ineffectiveness (1)
    (2,550 )     101       (6,474 )     (2,047 )
 
                       
Total
  $ (67,157 )   $ 6,969     $ (81,388 )   $ 28,443  
 
                       
 
(1)   Unrealized (loss) gain recognized in natural gas revenue related to the ineffective portion of open contracts that are not eligible for deferral under SFAS 133 due primarily to the basis differentials between the contract price and the indexed price at the point of sale.
     As of June 30, 2008, the Company had the following hedge contracts outstanding:
                         
                    June 30,  
            Weighted Average     2008 Fair Value  
Fixed Price Swaps   Quantity     Fixed Price     Liability  
    (In thousands)   
Natural Gas (MMbtus)
                       
July 1—December 31, 2008
    17,542,192     $ 8.41     $ (88,138 )
January 1—December 31, 2009
    31,642,084     $ 8.48       (121,670 )
Crude Oil (Bbls)
                       
July 1—December 31, 2008
    1,023,040     $ 78.80       (62,517 )
January 1—December 31, 2009
    2,172,210     $ 76.15       (131,664 )
 
                     
Total
                  $ (403,989 )
 
                     
                                 
                            June 30,  
            Weighted Average     Weighted Average     2008 Fair Value  
Costless Collars   Quantity     Floor     Cap     Liability  
    (In thousands)   
Natural Gas (MMbtus)
                               
July 1—December 31, 2008
    5,704,000     $ 7.83     $ 14.60     $ (4,045 )
Crude Oil (Bbls)
                               
July 1—December 31, 2008
    521,640     $ 61.65     $ 86.80       (27,841 )
 
                             
Total
                          $ (31,886 )
 
                             
     As of June 30, 2008, the Company expects $333.4 million in accumulated other comprehensive income to be reclassified as a decrease to natural gas and oil revenues within the next 12 months. As of August 5, 2008, the Company had not entered into any hedge transactions subsequent to June 30, 2008.
8. Commitments and Contingencies
     Minimum Future Lease Payments — The Company leases certain office facilities and other equipment under long-term operating lease arrangements. Minimum future lease obligations under the Company’s operating leases in effect at June 30, 2008 are as follows:
         
    (In thousands)  
2009
  $ 2,217  
2010
    2,489  
2011
    2,499  
2012
    2,414  
2013 and thereafter
    11,961  
     Other Commitments — In the ordinary course of business, the Company enters into long-term commitments to purchase seismic data. At June 30, 2008 and December 31, 2007, the Company’s seismic obligations totaled $5.4 million and $14.6 million, respectively. At June 30, 2008, the Company also has a long-term commitment for

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contracted drilling services of $136.8 million, of which $85.6 million and $51.2 million is due in 2008 and 2009, respectively.
     MMS Proceedings — Mariner and its subsidiary, Mariner Energy Resources, Inc. (“MERI”), own numerous properties in the Gulf of Mexico. Certain of such properties were leased from the Minerals Management Service of the United States Department of the Interior (“MMS”) subject to The Outer Continental Shelf Deep Water Royalty Relief Act (“RRA”), signed into law on November 28, 1995. The RRA relieved lessees of the obligation to pay royalties on certain leases until a designated volume was produced. Four of these leases held by the Company and one held by MERI that are producing or have produced contain language that limits royalty relief if commodity prices exceed predetermined levels. Since 2000, commodity prices have exceeded some of the predetermined levels, except in 2002. The Company and MERI believe the MMS did not have the authority to include commodity price threshold language in these leases and have withheld payment of royalties on the leases while disputing the MMS’ authority in pending proceedings on those leases that the MMS has issued orders to pay. The Company has recorded a liability for its estimated exposure on these leases, which at June 30, 2008 was $47.3 million, including interest. The potential liability of MERI under its lease relates to production from the lease commencing July 1, 2005, the effective date of Mariner’s acquisition of MERI.
     In May 2006, the MMS issued an order asserting price thresholds were exceeded in calendar years 2000, 2001, 2003 and 2004 and, accordingly, that royalties were due under such leases on oil and gas produced in those years. Mariner has filed and is pursuing an administrative appeal of that order. The MMS has not yet made demand for non-payment of royalties alleged to be due for calendar years subsequent to 2004 on the basis of price thresholds being exceeded.
     The enforceability of the price threshold provisions of leases granted pursuant to the RRA currently is being litigated in several administrative appeals filed by other companies in addition to Mariner.
  Insurance Matters
  Hurricanes Katrina and Rita (2005)
     In 2005, the Company’s operations were adversely affected by Hurricanes Katrina and Rita, resulting in substantial shut-in and delayed production, as well as necessitating extensive facility repairs and hurricane-related abandonment operations. Since 2005 through June 30, 2008, Mariner incurred approximately $157.5 million in hurricane expenditures resulting from Hurricanes Katrina and Rita. As of June 30, 2008, insurance recoveries totaled approximately $59.6 million, of which $2.5 million was received in 2007, $8.6 million was received in April 2008 and $48.5 million was received in May 2008 as discussed below.
     Insurance through which Mariner could make claims pertaining to Hurricanes Katrina and Rita includes policies provided by OIL Insurance Limited (“OIL”), an energy industry insurance cooperative, and separate commercial difference-in-coverage or excess insurance policies.  As to those hurricanes, OIL applies to properties Mariner acquired from Forest Oil Corporation (“Forest”) in 2006 and is subject to a deductible of $5.0 million per occurrence and a $1.0 billion industry-wide loss limit per occurrence. OIL has advised that the aggregate claims resulting from each of Hurricanes Katrina and Rita are expected to exceed the $1.0 billion per-occurrence loss limit and accordingly, Mariner’s insurance recovery is expected to be reduced pro-rata with all other competing claims from the storms.
     At June 30, 2008, the OIL insurance receivable balance for Mariner’s Hurricane Katrina and Rita claims was approximately $34.8 million, of which $28.1 million is classified as a long-term asset. Due to the magnitude of the storms and the complexity of the insurance claims being processed, the timing of Mariner’s ultimate insurance recovery from OIL cannot be ascertained. Mariner expects to maintain a potentially significant insurance receivable for the indefinite future while it actively pursues settlement of OIL claims to minimize the impact to working capital and liquidity. Any differences between Mariner’s insurance recoveries and insurance receivables will be recorded as adjustments to oil and natural gas properties.
     Mariner also had excess insurance applicable to damage from Hurricanes Katrina and Rita under separate policies for assets acquired from Forest in 2006 and legacy properties. In May 2008, Mariner agreed to a settlement

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with its insurers and underwriters for certain excess coverage claims related to property damage caused by Hurricanes Katrina and Rita to assets acquired from Forest. Net proceeds to Mariner were approximately $48.5 million. The settled excess coverage claims encompass assets on the continental shelf acquired from Forest, including properties located in the South Pass, Grand Isle, Garden Banks, Main Pass, South Timbalier, and Eugene Island lease areas. Settled claims include those for costs associated with physical impairment, debris removal, seepage and pollution clean up, and well control, as well as increased costs associated with plugging and abandonment of wells and facilities at those fields. The settled excess coverage claims are independent of the Company’s pending claims made through OIL. Mariner does not anticipate recovery of excess insurance applicable to its legacy properties as the associated $3.8 million deductible has not been satisfied.
  Hurricane Ivan (2004)
     In September 2004, Mariner incurred damage from Hurricane Ivan that affected the Mississippi Canyon 66, known as Ochre (“Ochre”) and Mississippi Canyon 357 fields. Ochre production was shut-in until September 2006, when production recommenced at approximately the same net rate. Mississippi Canyon 357 production was shut-in until March 2005, when necessary repairs were completed and production recommenced; however, production was subsequently shut-in due to Hurricane Katrina and recommenced in the first quarter of 2007. Since 2004 through June 30, 2008, Mariner incurred approximately $9.4 million of property damage related to Hurricane Ivan. As of June 30, 2008, approximately $2.4 million has been recovered through insurance, with the balance of $4.1 million, net of deductible, recorded as insurance receivable.
     Litigation — The Company, in the ordinary course of business, is a claimant and/or a defendant in various legal proceedings, including proceedings as to which the Company has insurance coverage and those that may involve the filing of liens against the Company or its assets. The Company does not consider its exposure in these proceedings, individually or in the aggregate, to be material. See “MMS Proceedings” above.
     Letters of Credit — On March 2, 2006, Mariner obtained an additional dedicated $40.0 million letter of credit under its bank credit facility that was not included as a use of the borrowing base. The balance of this letter of credit as of December 31, 2007 was $3.2 million. In January 2008, the letter of credit was reduced to zero and was cancelled.
     Mariner’s bank credit facility also has a letter of credit facility for up to $50.0 million that is included as a use of the borrowing base. As of June 30, 2008, four such letters of credit totaling $4.7 million were outstanding.
     Please refer to Note 3, “Long-Term Debt” for further discussion of these letters of credit.
9. Earnings per Share
     Basic earnings per share does not include dilution and is computed by dividing net income or loss attributed to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted earnings per share reflect the potential dilution that could occur upon vesting of restricted common stock or exercise of options to purchase common stock.
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2008     2007     2008     2007  
    (In thousands, except per share data)  
Numerator:
                               
Net Income
  $ 123,390     $ 32,958     $ 195,516     $ 71,165  
Denominator:
                               
Weighted average shares outstanding
    87,984       85,627       87,639       85,585  
Add dilutive securities
    845       278       791       182  
 
                       
Total weighted average shares outstanding and dilutive securities
  $ 88,829     $ 85,905     $ 88,430     $ 85,767  
 
                       
Earnings per share—basic
  $ 1.40     $ 0.38     $ 2.23     $ 0.83  
Earnings per share—diluted
  $ 1.39     $ 0.38     $ 2.21     $ 0.83  

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     Those shares issuable upon exercise of options to purchase common stock that would have been anti-dilutive are excluded from the computation of diluted earnings per share. Approximately 367,000 and 376,000 shares issuable upon exercise of stock options were excluded from the computation for the three months and six months ended June 30, 2008, respectively. Approximately 547,000 and 578,000 shares issuable upon exercise of stock options were excluded from the computation for the three months and six months ended June 30, 2007, respectively.
     Please refer to Note 6, “Stockholders’ Equity” for option and restricted stock activity for the six months ended June 30, 2008 and 2007.
10. Comprehensive Income
     Comprehensive income includes net income and certain items recorded directly to stockholders’ equity and classified as other comprehensive income. The table below summarizes comprehensive income and provides the components of the change in accumulated other comprehensive income for the three-month and six-month periods ended June 30, 2008 and 2007.
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2008     2007     2008     2007  
    (in thousands)     (in thousands)  
Net Income
  $ 123,390     $ 32,958     $ 195,516     $ 71,165  
Other comprehensive (loss) income:
                               
Derivative contracts settled and reclassified, net of income taxes of ($23,910), $2,445, ($28,977) and $9,979
    (43,247 )     4,523       (52,411 )     18,464  
Change in unrealized mark-to-market losses arising during period, net of income taxes of ($67,487), ($2,235), ($124,800) and ($29,358)
    (122,068 )     (4,134 )     (203,157 )     (52,329 )
 
                       
Change in accumulated other comprehensive (loss) gain
    (165,315 )     389       (255,568 )     (33,865 )
 
                       
Comprehensive (loss) income
  $ (41,925 )   $ 33,347     $ (60,052 )   $ 37,300  
 
                       
11. Fair Value Measurement
     Certain of Mariner’s assets and liabilities are reported at fair value in the accompanying Consolidated Balance Sheets. Such assets and liabilities include amounts for both financial and nonfinancial instruments. The carrying values of cash and cash equivalents, accounts receivable and accounts payable (including income taxes payable and accrued expenses) approximated fair value at June 30, 2008 and December 31, 2007. These assets and liabilities are not included in the following tables.
     SFAS 157 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. As presented in the table below, the hierarchy consists of three broad levels. Level 1 inputs on the hierarchy consist of unadjusted quoted prices in active markets for identical assets and liabilities and have the highest priority. Level 3 inputs are unobservable (meaning they reflect Mariner’s own assumptions regarding how market participants would price the asset or liability based on the best available information) and therefore have the lowest priority. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Mariner believes it uses appropriate valuation techniques based on the available inputs to measure the fair values of its assets and liabilities.
     SFAS 157 requires a credit adjustment for non-performance in calculating the fair value of financial instruments. The credit adjustment for derivatives in an asset position is determined based on the credit rating of the counterparty and the credit adjustment for derivatives in a liability position is determined based on Mariner’s credit rating.

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     The following table provides fair value measurement information for the Company’s derivative financial instruments as of June 30, 2008.
                                         
    As of June 30, 2008  
                    Fair Value Measurements Using:  
                            Significant        
                    Quoted Prices     other     Significant  
                    in Active     Observable     Unobservable  
    Carrying     Total Fair     Markets     Inputs     Inputs  
    Amount     Value     (Level 1)     (Level 2)     (Level 3)  
Derivative Financial Instruments                   (In thousands)                  
Crude oil and natural gas fixed price swaps and costless collars – Short Term
  $ (333,416 )   $ (333,416 )   $     $ (301,530 )   $ (31,886 )
 
                                       
Crude oil and natural gas fixed price swaps and costless collars – Long Term
    (102,459 )     (102,459 )           (102,459 )      
 
                             
Total
  $ (435,875 )   $ (435,875 )   $     $ (403,989 )   $ (31,886 )
 
                             
     The following methods and assumptions were used to estimate the fair values of Mariner’s derivative financial instruments in the table above.
Level 2 Fair Value Measurements
     The fair values of the crude oil and natural gas fixed price swaps are estimated using internal discounted cash flow calculations based upon forward commodity price curves, terms of each contract, and a credit adjustment based on Mariner’s credit rating as of June 30, 2008.
Level 3 Fair Value Measurements
     The fair values of the crude oil and natural gas costless collars are estimated valuations using the Black-Scholes valuation model based upon the forward commodity price curves, implied volatilities of commodities, and a credit adjustment based on Mariner’s credit rating as of June 30, 2008. The following table provides fair value measurement information for the Company’s Level 3 financial instruments as of June 30, 2008.
Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
                 
    For the Three     For the Six  
    Months Ended     Months Ended  
    June 30, 2008     June 30, 2008  
    (In thousands)  
Fair value of costless collars, beginning of period
  $ (13,536 )   $ (4,058 )
Total gains/(losses):
               
Included in natural gas and oil revenues (realized/unrealized)
    (11,697 )     (15,703 )
Included in other comprehensive loss (realized/unrealized)
    (18,350 )     (27,828 )
Purchases, issuances, and settlements, net
    11,697       15,703  
Transfers in and/or out of Level 3
           
 
           
Fair value of costless collars, end of period
  $ (31,886 )   $ (31,886 )
 
           
The amount of net losses for the period included in earnings attributable to the change in net unrealized losses relating to costless collars still held at the reporting date
  $     $  
 
           
12. Segment Information
     The FASB issued SFAS No. 131 “Disclosures about Segments of an Enterprise and Related Information” (“SFAS 131”), which establishes standards for reporting information about operating segments. Operating segments are defined as components of an enterprise that engage in activities from which they may earn revenues and incur expenses. Separate financial information is available and this information is regularly evaluated by the chief decision maker for the purpose of allocating resources and assessing performance.
     Mariner measures financial performance as a single enterprise, allocating capital resources on a project-by-project basis across its entire asset base to maximize profitability. Mariner utilizes a company-wide management

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team that administers all enterprise operations encompassing the exploration, development and production of oil and natural gas. All operations are located in the United States. Mariner tracks basic operational data by area, but inasmuch as it is one enterprise, it does not maintain comprehensive financial statement information by area.
13. Supplemental Guarantor Information
     On April 30, 2007, the Company sold and issued $300.0 million aggregate principal amount of its 8% Notes. On April 24, 2006, the Company sold and issued to eligible purchasers $300.0 million aggregate principal amount of its 71/2% Notes. The Notes are jointly and severally guaranteed on a senior unsecured basis by the Company’s existing and future domestic subsidiaries (“Subsidiary Guarantors”).
     The following information sets forth Mariner’s Consolidating Balance Sheets as of June 30, 2008 and December 31, 2007, Condensed Consolidating Statements of Operations for the three months and six months ended June 30, 2008 and 2007, and Condensed Consolidating Statements of Cash Flows for the six months ended June 30, 2008 and 2007.
     Mariner accounts for investments in its subsidiaries on the consolidation method; accordingly, entries necessary to consolidate Mariner, the parent company, and its Subsidiary Guarantors are reflected in the eliminations column. In the opinion of management, separate complete financial statements of the Subsidiary Guarantors would not provide additional material information that would be useful in assessing their financial composition.

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MARINER ENERGY, INC. AND SUBSIDIARIES
CONSOLIDATING BALANCE SHEET
June 30, 2008
(In thousands except share data)
(Unaudited)
                                 
                            Consolidated  
    Parent     Subsidiary             Mariner  
    Company     Guarantors     Eliminations     Energy, Inc.  
Current Assets:
                               
Cash and cash equivalents
  $ 38,127     $ 3,142     $     $ 41,269  
Receivables, net of allowances
    134,849       154,365             289,214  
Insurance receivables
    3,950       6,850             10,800  
Intangible assets
    5,422                   5,422  
Prepaid expenses and other
    12,527       2,379             14,906  
Deferred tax asset
    119,669                   119,669  
 
                       
Total current assets
    314,544       166,736             481,280  
Property and Equipment:
                               
Proved oil and gas properties, full-cost method
    1,773,717       2,001,704             3,775,421  
Unproved properties, not subject to amortization
    113,010       13,843             126,853  
 
                       
Total oil and gas properties
    1,886,727       2,015,547             3,902,274  
Other property and equipment
    33,050       33,208             66,258  
Accumulated depreciation, depletion and amortization
    (537,309 )     (467,183 )           (1,004,492 )
 
                       
Total property and equipment, net
    1,382,468       1,581,572             2,964,040  
Investment in Subsidiaries
    1,171,614             (1,171,614 )      
Intercompany Receivables / (Payables)
    292,088       (292,088 )            
Goodwill
          295,598             295,598  
Insurance Receivables
          28,145             28,145  
Other Assets, net of amortization
    61,154       1,012             62,166  
 
                       
TOTAL ASSETS
  $ 3,221,868     $ 1,780,975     $ (1,171,614 )   $ 3,831,229  
 
                       
 
                               
Current Liabilities:
                               
Accounts payable
  $ 18,090     $     $     $ 18,090  
Accrued liabilities
    99,710       35,951             135,661  
Accrued capital costs
    151,841       58,669             210,510  
Abandonment liability
    4,222       48,199             52,421  
Accrued interest
    9,848                   9,848  
Derivative financial instruments
    333,416                   333,416  
 
                       
Total current liabilities
    617,127       142,819             759,946  
 
                               
Long-Term Liabilities:
                               
Abandonment liability
    53,710       154,720             208,430  
Deferred income tax
    113,874       307,011             420,885  
Derivative financial instruments
    102,459                   102,459  
Long-term debt, bank credit facility
    350,000                   350,000  
Long-term debt, senior unsecured notes
    600,000                   600,000  
Other long-term liabilities
    50,034       4,622             54,656  
 
                       
Total long-term liabilities
    1,270,077       466,353             1,736,430  
 
                               
Commitments and Contingencies (see Note 8)
                               
 
                               
Minority Interest
          189             189  
 
                               
Stockholders’ Equity:
                               
Preferred stock, $.0001 par value; 20,000,000 shares authorized, no shares issued and outstanding at June 30, 2008
                       
Common stock, $.0001 par value; 180,000,000 shares authorized, 88,820,553 shares issued and outstanding at June 30, 2008
    9       5       (5 )     9  
Additional paid-in capital
    1,057,787       886,142       (886,142 )     1,057,787  
Partner capital
          29,192       (29,192 )      
Accumulated other comprehensive loss
    (278,144 )                 (278,144 )
Accumulated retained earnings
    555,012       256,275       (256,275 )     555,012  
 
                       
Total stockholders’ equity
    1,334,664       1,171,614       (1,171,614 )     1,334,664  
 
                       
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY
  $ 3,221,868     $ 1,780,975     $ (1,171,614 )   $ 3,831,229  
 
                       

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MARINER ENERGY, INC. AND SUBSIDIARIES
CONSOLIDATING BALANCE SHEET
December 31, 2007
(In thousands except share data)
(Unaudited)
                                 
                            Consolidated  
    Parent     Subsidiary             Mariner  
    Company     Guarantors     Eliminations     Energy, Inc.  
Current Assets:
                               
Cash and cash equivalents
  $ 18,589     $     $     $ 18,589  
Receivables, net of allowances
    64,727       93,047             157,774  
Insurance receivables
    3,950       22,733             26,683  
Derivative financial instruments
    11,863                   11,863  
Intangible assets
    16,209       1,000             17,209  
Prepaid expenses and other
    9,092       1,538             10,630  
Deferred tax asset
    6,232                   6,232  
 
                       
Total current assets
    130,662       118,318             248,980  
 
                       
Property and Equipment:
                               
Proved oil and gas properties, full-cost method
    1,469,989       1,648,284             3,118,273  
Unproved properties, not subject to amortization
    40,025       430             40,455  
 
                       
Total oil and gas properties
    1,510,014       1,648,714             3,158,728  
Other property and equipment
    15,495       50             15,545  
Accumulated depreciation, depletion and amortization
    (403,159 )     (350,920 )           (754,079 )
 
                       
Total property and equipment, net
    1,122,350       1,297,844             2,420,194  
Investment in Subsidiaries
    1,014,548             (1,014,548 )      
Intercompany Receivables / (Payables)
    222,215       (222,215 )            
Restricted Cash
          5,000             5,000  
Goodwill
          295,598             295,598  
Insurance Receivables
    2,663       54,261             56,924  
Derivative Financial Instruments
    691                   691  
Other Assets, net of amortization
    55,607       641             56,248  
 
                       
TOTAL ASSETS
  $ 2,548,736     $ 1,549,447     $ (1,014,548 )   $ 3,083,635  
 
                       
Current Liabilities:
                               
Accounts payable
  $ 1,064     $     $     $ 1,064  
Accrued liabilities
    70,467       26,469             96,936  
Accrued capital costs
    85,839       73,171             159,010  
Abandonment liability
    4,383       26,602             30,985  
Accrued interest
    7,726                   7,726  
Derivative financial instruments
    19,468                   19,468  
 
                       
Total current liabilities
    188,947       126,242             315,189  
 
                               
Long-Term Liabilities:
                               
Abandonment liability
    49,827       141,194             191,021  
Deferred income tax
    80,095       263,853             343,948  
Derivative financial instruments
    25,343                   25,343  
Long-term debt, bank credit facility
    179,000                   179,000  
Long-term debt, senior unsecured notes
    600,000                   600,000  
Other long-term liabilities
    34,506       3,609             38,115  
 
                       
Total long-term liabilities
    968,771       408,656             1,377,427  
 
                               
Commitments and Contingencies (see Note 8)
                               
 
                               
Minority Interest
          1             1  
 
                               
Stockholders’ Equity:
                               
Preferred stock, $.0001 par value; 20,000,000 shares authorized, no shares issued and outstanding at December 31, 2007
                       
Common stock, $.0001 par value; 180,000,000 shares authorized, 87,229,312 shares issued and outstanding at December 31, 2007
    9       5       (5 )     9  
Additional paid-in capital
    1,054,089       886,142       (886,142 )     1,054,089  
Partner capital
          6,000       (6,000 )      
Accumulated other comprehensive loss
    (22,576 )                 (22,576 )
Accumulated retained earnings
    359,496       122,401       (122,401 )     359,496  
 
                       
Total stockholders’ equity
    1,391,018       1,014,548       (1,014,548 )     1,391,018  
 
                       
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY
  $ 2,548,736     $ 1,549,447     $ (1,014,548 )   $ 3,083,635  
 
                       

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MARINER ENERGY, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Three Months Ended June 30, 2008
(In thousands)
(Unaudited)
                                 
                            Consolidated  
    Parent     Subsidiary             Mariner  
    Company     Guarantors     Eliminations     Energy, Inc.  
Revenues:
                               
Natural gas
  $ 110,905     $ 139,373     $     $ 250,278  
Oil
    76,215       68,341             144,556  
Natural gas liquids
    25,541       7,516             33,057  
Other revenues
    41       1,520             1,561  
 
                       
Total revenues
    212,702       216,750             429,452  
 
                       
 
                               
Costs and Expenses:
                               
Operating expenses
    31,769       33,006             64,775  
General and administrative expense
    14,189       171             14,360  
Depreciation, depletion and amortization
    76,425       65,029             141,454  
Other miscellaneous expense
    640       37             677  
 
                       
Total costs and expenses
    123,023       98,243             221,266  
 
                       
OPERATING INCOME
    89,679       118,507             208,186  
Earnings of Affiliates
    88,686             (88,686 )      
Other Income (Expense):
                               
Interest income
    2,491       15       (2,225 )     281  
Interest expense, net of amounts capitalized
    (17,433 )     (2,355 )     2,225       (17,563 )
 
                       
Income Before Taxes and Minority Interest
    163,423       116,167       (88,686 )     190,904  
Provision for Income Taxes
    (40,033 )     (27,383 )           (67,416 )
Minority Interest Expense
          (98 )           (98 )
 
                       
NET INCOME
  $ 123,390     $ 88,686     $ (88,686 )   $ 123,390  
 
                       

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MARINER ENERGY, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Three Months Ended June 30, 2007
(In thousands)
(Unaudited)
                                 
                            Consolidated  
    Parent     Subsidiary             Mariner  
    Company     Guarantors     Eliminations     Energy, Inc.  
Revenues:
                               
Natural gas
  $ 60,368     $ 73,714     $     $ 134,082  
Oil
    32,129       34,549             66,678  
Natural gas liquids
    7,284       4,129             11,413  
Other revenues
    908                   908  
 
                       
Total revenues
    100,689       112,392             213,081  
 
                       
 
                               
Costs and Expenses:
                               
Operating expenses
    10,201       32,691             42,892  
General and administrative expense
    12,072       806             12,878  
Depreciation, depletion and amortization
    45,392       48,407             93,799  
Other miscellaneous expense
    70       224             294  
 
                       
Total costs and expenses
    67,735       82,128             149,863  
 
                       
OPERATING INCOME
    32,954       30,264             63,218  
Earnings of Affiliates
    17,183             (17,183 )      
Other Income (Expense):
                               
Interest income
    3,872       1       (3,642 )     231  
Interest expense, net of amounts capitalized
    (13,818 )     (3,697 )     3,642       (13,873 )
Other income
          (373 )           (373 )
 
                       
Income Before Taxes and Minority Interest
    40,191       26,195       (17,183 )     49,203  
Provision for Income Taxes
    (7,233 )     (9,012 )           (16,245 )
 
                       
NET INCOME
  $ 32,958     $ 17,183     $ (17,183 )   $ 32,958  
 
                       

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MARINER ENERGY, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Six Months Ended June 30, 2008
(In thousands)
(Unaudited)
                                 
                            Consolidated  
    Parent     Subsidiary             Mariner  
    Company     Guarantors     Eliminations     Energy, Inc.  
Revenues:
                               
Natural gas
  $ 196,438     $ 233,463     $     $ 429,901  
Oil
    138,146       120,024             258,170  
Natural gas liquids
    37,284       16,754             54,038  
Other revenues
    375       2,865             3,240  
 
                       
Total revenues
    372,243       373,106             745,349  
 
                       
 
                               
Costs and Expenses:
                               
Operating expenses
    52,875       64,361             117,236  
General and administrative expense
    25,416       870             26,286  
Depreciation, depletion and amortization
    136,580       124,192             260,772  
Other miscellaneous expense
    1,161       53             1,214  
 
                       
Total costs and expenses
    216,032       189,476             405,508  
 
                       
OPERATING INCOME
    156,211       183,630             339,841  
Earnings of Affiliates
    133,874             (133,874 )      
Other Income (Expense):
                               
Interest income
    5,534       22       (4,949 )     607  
Interest expense, net of amounts capitalized
    (35,807 )     (5,276 )     4,949       (36,134 )
 
                       
Income Before Taxes and Minority Interest
    259,812       178,376       (133,874 )     304,314  
Provision for Income Taxes
    (64,296 )     (44,314 )           (108,610 )
Minority Interest Expense
          (188 )           (188 )
 
                       
NET INCOME
  $ 195,516     $ 133,874     $ (133,874 )   $ 195,516  
 
                       

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MARINER ENERGY, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
Six Months Ended June 30, 2007
(In thousands)
(Unaudited)
                                 
                            Consolidated  
    Parent     Subsidiary             Mariner  
    Company     Guarantors     Eliminations     Energy, Inc.  
Revenues:
                               
Natural gas
  $ 135,916     $ 138,698     $     $ 274,614  
Oil
    64,232       62,897             127,129  
Natural gas liquids
    12,083       8,479             20,562  
Other revenues
    2,241       140             2,381  
 
                       
Total revenues
    214,472       210,214             424,686  
 
                       
 
                               
Costs and Expenses:
                               
Operating expenses
    27,003       54,252             81,255  
General and administrative expense
    21,405       2,649             24,054  
Depreciation, depletion and amortization
    85,490       107,165             192,655  
Other miscellaneous expense
    1,038       (576 )           462  
 
                       
Total costs and expenses
    134,936       163,490             298,426  
 
                       
OPERATING INCOME
    79,536       46,724             126,260  
Earnings of Affiliates
    29,557             (29,557 )      
Other Income (Expense):
                               
Interest income
    7,769       1       (7,248 )     522  
Interest expense, net of amounts capitalized
    (26,032 )     (7,436 )     7,248       (26,220 )
Other income
          5,058             5,058  
 
                       
Income Before Taxes and Minority Interest
    90,830       44,347       (29,557 )     105,620  
Provision for Income Taxes
    (19,665 )     (14,790 )           (34,455 )
 
                       
NET INCOME
  $ 71,165     $ 29,557     $ (29,557 )   $ 71,165  
 
                       

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MARINER ENERGY, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Six Months Ended June 30, 2008
(In thousands)
(Unaudited)
                                 
                            Consolidated  
    Parent     Subsidiary             Mariner  
    Company     Guarantors     Eliminations     Energy, Inc.  
Net cash provided by (used in) operating activities
  $ 322,194     $ 363,160     $ (133,874 )   $ 551,480  
 
                       
Cash flow from investing activities:
                               
Acquisitions and additions to oil and gas properties
    (297,858 )     (355,052 )           (652,910 )
Additions to other property and equipment
    (15,447 )     (33,158 )           (48,605 )
Restricted cash designated for investment
          5,000             5,000  
 
                       
Net cash used in investing activities
    (313,305 )     (383,210 )           (696,515 )
 
                       
Cash flow from financing activities:
                               
Credit facility borrowings
    630,000                   630,000  
Credit facility repayments
    (459,000 )                 (459,000 )
Other financing activities
    (26,477 )     23,192             (3,285 )
Net activity in investment from subsidiaries
    (133,874 )           133,874        
 
                       
Net cash provided by financing activities
    10,649       23,192       133,874       167,715  
 
                       
Increase in Cash and Cash Equivalents
    19,538       3,142             22,680  
Cash and Cash Equivalents at Beginning of Period
    18,589                   18,589  
 
                       
Cash and Cash Equivalents at End of Period
  $ 38,127     $ 3,142     $     $ 41,269  
 
                       
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Six Months Ended June 30, 2007
(In thousands)
(Unaudited)
                                 
                            Consolidated  
    Parent     Subsidiary             Mariner  
    Company     Guarantors     Eliminations     Energy, Inc.  
Net cash provided by (used in) operating activities
  $ 196,520     $ 116,934     $ (29,557 )   $ 283,897  
Cash flow from investing activities:
                               
Acquisitions and additions to oil and gas properties
    (192,552 )     (63,942 )           (256,494 )
Additions to other property and equipment
    (913 )     7             (906 )
Restricted cash designated for investment
    31,830                   31,830  
Other investing activities
    18       1,085             1,103  
 
                       
Net cash used in investing activities
    (161,617 )     (62,850 )           (224,467 )
 
                       
Cash flow from financing activities:
                               
Credit facility borrowings
    142,000                   142,000  
Credit facility repayments
    (496,000 )                 (496,000 )
Proceeds from note offering
    300,000                   300,000  
Other financing activities
    (5,862 )                 (5,862 )
Net activity in investment from subsidiaries
    24,527       (54,084 )     29,557        
 
                       
Net cash (used in) provided by financing activities
    (35,335 )     (54,084 )     29,557       (59,862 )
 
                       
Decrease in Cash and Cash Equivalents
    (432 )                 (432 )
Cash and Cash Equivalents at Beginning of Period
    9,579                   9,579  
 
                       
Cash and Cash Equivalents at End of Period
  $ 9,147     $     $     $ 9,147  
 
                       

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations
     The following discussion is intended to assist you in understanding our business and the results of operations together with our present financial condition. This section should be read in conjunction with our Consolidated Financial Statements and the accompanying notes included in this Quarterly Report, as well as our Annual Report on Form 10-K for the fiscal year ended December 31, 2007. For meanings of oil and natural gas terms used in this Quarterly Report, please refer to “Glossary of Oil and Natural Gas Terms” under “Business” in Part I, Item 1 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2007.
     Statements in our discussion may be forward-looking. These forward-looking statements involve risks and uncertainties. We caution that a number of factors could cause future production, revenues and expenses to differ materially from our expectations. Please see “Risk Factors” in Item 1A of Part II of this Quarterly Report regarding certain risk factors relating to the Company.
Overview
     We are an independent oil and natural gas exploration, development and production company with principal operations in West Texas and the Gulf of Mexico. As of December 31, 2007, approximately 67% of our total estimated proved reserves were classified as proved developed, with approximately 46% of the total estimated proved reserves located in West Texas, 15% in the Gulf of Mexico deepwater and 39% on the Gulf of Mexico shelf.
     Our revenues, profitability and future growth depend substantially on prevailing prices for oil and natural gas and our ability to find, develop and acquire oil and gas reserves that are economically recoverable and to control operating costs. The energy markets have historically been very volatile. Commodity prices currently are at high levels relative to prior periods and can be expected to fluctuate significantly in the future. Although we attempt to mitigate the impact of price declines and provide for more predictable cash flows through our hedging strategy, a substantial or extended decline in oil and natural gas prices or poor drilling results could have a material adverse effect on our financial position, results of operations, cash flows, quantities of natural gas and oil reserves that we can economically produce and our access to capital. Conversely, the use of derivative instruments also can prevent us from realizing the full benefit of upward price movements.
     On January 31, 2008, we acquired 100% of the equity in a subsidiary of Hydro Gulf of Mexico, Inc. pursuant to a Membership Interest Purchase Agreement executed on December 23, 2007. The acquired subsidiary, now known as Mariner Gulf of Mexico LLC (“MGOM”), was an indirect subsidiary of StatoilHydro ASA and owns substantially all of its former Gulf of Mexico shelf operations. A summary of these assets and operations as of January 1, 2008 includes:
    Ryder Scott Company, L.P. estimated proved oil and gas reserves of 49.7 Bcfe, 93% of which are developed;
 
    interests in 36 (16 net) producing wells producing approximately 53 MMcfe per day net to MGOM’s interest, 76% of which Mariner now operates;
 
    gas gathering systems comprised of 31 miles of 10-inch, 12-inch and 16-inch pipelines; and
 
    approximately 106,000 net acres of developed leasehold and 256,000 net acres of undeveloped leasehold.
     We paid approximately $243.0 million, subject to customary purchase price adjustments, including $8.0 million for reimbursement of drilling costs attributable to the High Island 166 #5 well. The acquisition of MGOM was financed by borrowing under our bank credit facility.
     On December 31, 2007 and February 29, 2008, we acquired additional working interests in certain of our existing properties in the Spraberry field in the Permian Basin. We internally estimated net proved oil and gas reserves attributable to the December 2007 acquisition of approximately 94.9 Bcfe (75% oil and natural gas liquids) and to the February 2008 acquisition of approximately 14.0 Bcfe (65% oil and natural gas liquids). We operate substantially all of the assets. The purchase price, subject to customary purchase price adjustments, for the December 2007 acquisition was approximately $122.5 million, which we financed under our bank credit facility, and for the February 2008 acquisition was approximately $21.7 million paid for with cash flow from operations.

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Second Quarter 2008 Highlights
     Mariner achieved record quarterly revenues, earnings and production for second quarter 2008. Net income for second quarter 2008 was $123.4 million, an increase of 274% compared with second quarter 2007. Fully-diluted earnings per share (EPS) were $1.39, up 266% from $0.38 fully-diluted EPS reported for second quarter 2007. Other financial and operational highlights include:
    Estimated average daily production for second quarter 2008 increased to 390 million cubic feet of natural gas equivalent per day. Actualized prior period adjustments brought our reported average daily production to 400 million cubic feet of natural gas equivalent per day.
 
    Total revenues for second quarter 2008 increased 102% to $429.5 million, up from the $213.1 million reported for second quarter 2007.
 
    Net cash provided by operations for the first six months of 2008 increased 94% to $551.5 million, up from $283.9 million for 2007.
 
    During second quarter 2008, we announced a deepwater discovery at Garden Banks 462 #1, known as Geauxpher, in which Mariner holds a 60% working interest. In July 2008, Garden Banks 462 #2, a delineation well, was successful. Development is underway with initial combined gross production rates estimated from 125 to 150 million cubic feet of natural gas equivalent per day expected by year-end 2008.
 
    During second quarter 2008, we settled certain excess coverage insurance claims related to property damage caused by Hurricanes Katrina and Rita for net proceeds of approximately $48.5 million, which were in addition to an interim payment by our primary insurer of $8.6 million in April 2008. In July 2008, we settled insurance claims related to property damage caused by Hurricane Ivan for agreed net proceeds of approximately $3.9 million.
Operational Update
     Offshore— Mariner drilled seven offshore wells in the second quarter of 2008 of which six were successful. Information regarding the six successful wells is shown below.
                         
Well Name   Operator   Working Interest   Water Depth (Ft)   Location
Eugene Island 342 C17
  Mariner     50 %     287     Conventional Shelf
West Cameron 110 #19
  Mariner     100 %     41     Conventional Shelf
Vermilion 380 A15ST4
  Mariner     100 %     340     Conventional Shelf
South Marsh 76 F-2
  Mariner     100 %     138     Conventional Shelf
Viosca Knoll 821 #1
  Mariner     30 %     1,028     Deepwater (1)
Garden Banks 462 #1
  Mariner     60 %     2,700     Deepwater
 
(1)   As defined in Mariner’s Form 10-K for the fiscal year ended December 31, 2007, “deepwater” means depths greater than 1,300 feet.  Operationally, Mariner characterizes this well as located in the deepwater because its development and infrastructure requirements, such as a subsea tieback, are more typical of Mariner’s deepwater wells.  Mariner reports financial results for wells consistent with the definitional scheme set forth in its Form 10-K.
     Mariner has been successful in 10 of 13 offshore wells drilled from January 1, 2008 through June 30, 2008. As of June 30, 2008, four offshore wells were drilling.
     In addition, as of July 2008, the Minerals Management Service of the United States Department of the Interior (“MMS”) had awarded Mariner 19 blocks on which it was the apparent high bidder at the Central Gulf of Mexico Lease Sale 206 held by the MMS on March 19, 2008. The awarded blocks involve seven deepwater subsalt prospects (both Miocene and Lower Tertiary), four deepwater prospects, four deep shelf prospects, and one

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conventional shelf prospect. Mariner’s net exposure on the awarded bids was $79.1 million and our working interest ranges from 33% to 100%.
     Mariner had submitted bids on 30 blocks, most of which were joint bids with one or more industry partners, and exposed a net total of $109.9 million. Several of Mariner’s identified prospects were among the most active in the sale, with 26 of Mariner’s 30 bids receiving one or more competing bids and one receiving 10 bids.
     Onshore In the second quarter of 2008, Mariner drilled 34 development wells in West Texas, all of which were successful. As of June 30, 2008, four rigs were operating on our West Texas properties.
Results of Operations
Three Months Ended June 30, 2008 Compared to Three Months Ended June 30, 2007
     The following table sets forth summary information with respect to our oil and natural gas operations. Certain prior year amounts have been reclassified to conform to current year presentation.
                                 
    Three Months Ended              
    June 30,     Increase        
Summary Operating Information:   2008     2007     (Decrease)     % Change  
    (In thousands, except net production, average sales prices, average unit  
    costs per Mcfe and % change)  
Net Production:
                               
Natural gas (MMcf)
    24,359       16,391       7,968       49 %
Oil (MBbls)
    1,502       1,081       421       39 %
Natural gas liquids (MBbls)
    511       282       229       81 %
Total natural gas equivalent (MMcfe)
    36,434       24,567       11,867       48 %
Average daily production (MMcfe/d)
    400       270       130       48 %
Hedging Activities:
                               
Natural gas revenue (loss) gain
  $ (28,839 )   $ 8,186     $ (37,025 )     (452 )%
Oil revenue loss
    (38,318 )     (1,217 )     (37,101 )     3,049 %
 
                       
Total hedging revenue (loss) gain
  $ (67,157 )   $ 6,969     $ (74,126 )     (1,064 )%
Average Sales Prices:
                               
Natural gas (per Mcf) realized(1)
  $ 10.27     $ 8.18     $ 2.09       26 %
Natural gas (per Mcf) unhedged
    11.46       7.68       3.78       49 %
Oil (per Bbl) realized(1)
    96.24       61.69       34.55       56 %
Oil (per Bbl) unhedged
    121.75       62.82       58.93       94 %
Natural gas liquids (per Bbl) realized(1)
    64.69       40.51       24.18       60 %
Natural gas liquids (per Bbl) unhedged
    64.69       40.51       24.18       60 %
Total natural gas equivalent ($/Mcfe) realized(1)
    11.74       8.64       3.10       36 %
Total natural gas equivalent ($/Mcfe) unhedged
    13.59       8.35       5.24       63 %
Summary of Financial Information:
                               
Natural gas revenue
  $ 250,278     $ 134,082     $ 116,196       87 %
Oil revenue
    144,556       66,678       77,878       117 %
Natural gas liquids revenue
    33,057       11,413       21,644       190 %
Other revenues
    1,561       908       653       72 %
Lease operating expense
    55,315       38,601       16,714       43 %
Severance and ad valorem taxes
    5,263       2,888       2,375       82 %
Transportation expense
    4,197       1,403       2,794       199 %
General and administrative expense
    14,360       12,878       1,482       12 %
Depreciation, depletion and amortization
    141,454       93,799       47,655       51 %
Other miscellaneous expense
    677       294       383       130 %
Net interest expense
    17,282       13,642       3,640       27 %
Other income (expense)
          (373 )     (373 )     (100 )%
Income before taxes and minority interest
    190,904       49,203       141,701       288 %
Provision for income taxes
    67,416       16,245       51,171       315 %
Net Income
    123,390       32,958       90,432       274 %

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    Three Months Ended              
    June 30,     Increase        
Summary Operating Information:   2008     2007     (Decrease)     % Change  
    (In thousands, except net production, average sales prices, average unit  
    costs per Mcfe and % change)  
Average Unit Costs per Mcfe:
                               
Lease operating expense
  $ 1.52     $ 1.57     $ (0.05 )     (3 )%
Severance and ad valorem taxes
    0.14       0.12       0.02       17 %
Transportation expense
    0.12       0.06       0.06       100 %
General and administrative expense
    0.39       0.52       (0.13 )     (25 )%
Depreciation, depletion and amortization
    3.88       3.82       0.06       2 %
 
(1)   Average sales prices include the effects of hedging
     Net Income for second quarter 2008 was $123.4 million compared to $33.0 million for the comparable period in 2007. Basic and fully-diluted earnings per share for second quarter 2008 were $1.40 and $1.39, respectively, compared to $0.38 for each measure in second quarter 2007.
     Net Production for second quarter 2008 increased 48% compared to second quarter 2007 as a result of increased production from our Gulf of Mexico and onshore properties. Net production in the Gulf of Mexico for second quarter 2008 increased 49% to 32.7 Bcfe from 22.0 Bcfe for second quarter 2007 primarily reflecting the start up of production from several new projects, most notably Northwest Nansen located in East Breaks 602 (which contributed 4.5 Bcfe during the quarter) and Bass Lite located in Atwater 426 (which contributed 1.7 Bcfe during the quarter), and the impact of our acquisition of MGOM (which contributed 4.7 Bcfe during the quarter). Onshore production for second quarter 2008 increased 46% to 3.8 Bcfe from 2.6 Bcfe for second quarter 2007 primarily as a result of the drilling and completion of additional wells and our acquisition of additional interests in West Texas (which contributed 0.7 Bcfe during the quarter). Natural gas production comprised approximately 67% of total net production for each of the second quarters in 2008 and 2007.
     Natural gas, oil and NGL revenues for second quarter 2008 increased 102% to $427.9 million compared to $212.2 million for second quarter 2007 as a result of increased pricing (approximately $113.2 million, net of the effect of hedging), and increased production (approximately $102.5 million).
     During second quarter 2008, our revenues reflect a net recognized hedging loss of $67.2 million comprised of $64.6 million in unfavorable cash settlements and an unrealized loss of $2.6 million related to the ineffective portion of open contracts that are not eligible for deferral under Statement of Financial Accounting Standards (“SFAS”) No. 133, “Accounting for Derivative Instruments and Hedging Activities” (“SFAS 133”), due primarily to the basis differentials between the contract price and the indexed price at the point of sale. This compares to a net recognized hedging gain of $7.0 million for the same quarter in 2007, comprised of $6.9 million of favorable cash settlements and a $0.1 million unrealized gain related to the ineffective portion not eligible for deferral under SFAS 133.
     The effects of hedging activities on our average sales prices were as follows:
                                 
                    Hedging    
    Realized   Unhedged   (Loss) Gain   % Change
Second quarter 2008:
                               
Natural gas (per Mcf)
  $ 10.27     $ 11.46     $ (1.19 )     (10.4 )%
Oil (per Bbl)
    96.24       121.75       (25.51 )     (21.0 )%
 
                               
Second quarter 2007:
                               
Natural gas (per Mcf)
  $ 8.18     $ 7.68     $ 0.50       6.5 %
Oil (per Bbl)
    61.69       62.82       (1.13 )     (1.8 )%
     Other revenues for second quarter 2008 increased approximately $0.7 million to $1.6 million from $0.9 million for second quarter 2007 as a result of imputed rental income from the lease of office property acquired by the Company in January 2008, offset by decreased transportation income from our gathering system in West Texas.
     Lease operating expense (“LOE”) for second quarter 2008 increased approximately $16.7 million to $55.3 million from $38.6 million for second quarter 2007, primarily as a result of start-up production in February 2008 from Bass Lite and Northwest Nansen, the acquisition of MGOM and a $7.1 million multiple-year retrospective premium adjustment payable to OIL Insurance Limited (“OIL”), an energy industry insurance cooperative.

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     Severance and ad valorem tax for second quarter 2008 increased approximately $2.4 million to $5.3 million from $2.9 million for second quarter 2007 due primarily to increased severance as a result of higher oil and natural gas prices and increased production resulting from the drilling and completion of additional wells and our acquisition of additional interests in West Texas.
     Transportation expense for second quarter 2008 increased approximately $2.8 million to $4.2 million from $1.4 million for second quarter 2007 due primarily to commencement of production at Bass Lite, Northwest Nansen, Galveston 352 and High Island A467. Increased production at Mississippi Canyon 674, known as Pluto, also contributed to the increase.
     General and administrative (“G&A”) expense for second quarter 2008 increased approximately $1.5 million to $14.4 million from $12.9 million for second quarter 2007. Excluding stock compensation expense, G&A for second quarter 2008 decreased approximately $1.3 million to $9.8 million from $11.1 million for second quarter 2007. Beginning in 2008, that portion of Lafayette and Midland office expense that is directly related to production activity is classified as LOE, and stock compensation expense attributable to those non-officer employees directly engaged in exploration, development and acquisition activities is capitalized.
     Depreciation, depletion, and amortization expense for second quarter 2008 increased approximately $47.7 million to $141.5 million from $93.8 million for second quarter 2007, primarily as a result of increased production from our acquisitions of MGOM and additional interests in West Texas properties, start-up production from Bass Lite and Northwest Nansen and higher costs.
     Other miscellaneous expense for second quarter 2008 increased approximately $0.4 million to $0.7 million from $0.3 million for second quarter 2007.
     Net interest expense for second quarter 2008 increased approximately $3.7 million to $17.3 million from $13.6 million for second quarter 2007 due primarily to an increase in average debt levels to $1.0 billion for second quarter 2008 as compared to $605.3 million for second quarter 2007.
     Other income (expense) for second quarter 2007 reflected expenses attributable to our 2006 acquisition of the Gulf of Mexico operations of Forest Oil Corporation (“Forest”).
     Income before taxes and minority interest for second quarter 2008 increased approximately $141.7 million to $190.9 million from $49.2 million for second quarter 2007 due to increased operating income partially offset by increased net interest expense discussed above.
     Provision for income taxes for second quarter 2008 reflected an effective tax rate of 35.3% as compared to 33.0% for second quarter 2007. The increase in our effective tax rate is due primarily to a permanent book-tax difference attributable to post-allocation period activity in 2007 related to our acquisition of Forest’s Gulf of Mexico operations.
Six Months Ended June 30, 2008 Compared to Six Months Ended June 30, 2007
     The following table sets forth summary information with respect to our oil and natural gas operations. Certain prior year amounts have been reclassified to conform to current year presentation.
                                 
    Six Months Ended              
    June 30,     Increase        
Summary Operating Information:   2008     2007     (Decrease)     % Change  
    (In thousands, except net production, average sales prices, average unit costs per Mcfe and % change)  
Net Production:
                               
Natural gas (MMcf)
    45,315       33,869       11,446       34 %
Oil (MBbls)
    2,851       2,127       724       34 %
Natural gas liquids (MBbls)
    888       559       329       59 %
Total natural gas equivalent (MMcfe)
    67,749       49,985       17,764       35 %
Average daily production (MMcfe/d)
    372       276       96       35 %

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    Six Months Ended              
    June 30,     Increase        
Summary Operating Information:   2008     2007     (Decrease)     % Change  
    (In thousands, except net production, average sales prices, average unit costs per Mcfe and % change)  
Hedging Activities:
                               
Natural gas revenue (loss) gain
  $ (26,902 )   $ 27,973     $ (54,875 )     (196 )%
Oil revenue (loss) gain
    (54,486 )     470       (54,956 )     (11,693 )%
 
                         
Total hedging revenue (loss) gain
  $ (81,388 )   $ 28,443     $ (109,831 )     (386 )%
Average Sales Prices:
                               
Natural gas (per Mcf) realized(1)
  $ 9.49     $ 8.11     $ 1.38       17 %
Natural gas (per Mcf) unhedged
    10.08       7.28       2.80       38 %
Oil (per Bbl) realized(1)
    90.55       59.76       30.79       52 %
Oil (per Bbl) unhedged
    109.67       59.54       50.13       84 %
Natural gas liquids (per Bbl) realized(1)
    60.85       36.81       24.04       65 %
Natural gas liquids (per Bbl) unhedged
    60.85       36.81       24.04       65 %
Total natural gas equivalent ($/Mcfe) realized(1)
    10.95       8.45       2.50       30 %
Total natural gas equivalent ($/Mcfe) unhedged
    12.16       7.88       4.28       54 %
Summary of Financial Information:
                               
Natural gas revenue
  $ 429,901     $ 274,614     $ 155,287       57 %
Oil revenue
    258,170       127,129       131,041       103 %
Natural gas liquids revenue
    54,038       20,562       33,476       163 %
Other revenues
    3,240       2,381       859       36 %
Lease operating expense
    100,147       72,072       28,075       39 %
Severance and ad valorem taxes
    9,873       5,878       3,995       68 %
Transportation expense
    7,216       3,305       3,911       118 %
General and administrative expense
    26,286       24,054       2,232       9 %
Depreciation, depletion and amortization
    260,772       192,655       68,117       35 %
Other miscellaneous expense
    1,214       462       752       163 %
Net interest expense
    35,527       25,698       9,829       38 %
Other income (expense)
          5,058       (5,058 )     (100 )%
Income before taxes and minority interest
    304,314       105,620       198,694       188 %
Provision for income taxes
    108,610       34,455       74,155       215 %
Net Income
    195,516       71,165       124,351       175 %
Average Unit Costs per Mcfe:
                               
Lease operating expense
  $ 1.48     $ 1.44     $ 0.04       3 %
Severance and ad valorem taxes
    0.15       0.12       0.03       25 %
Transportation expense
    0.11       0.07       0.04       57 %
General and administrative expense
    0.39       0.48       (0.09 )     (19 )%
Depreciation, depletion and amortization
    3.85       3.85       0.00       N/A  
 
(1)   Average sales prices include the effects of hedging
     Net Income for the first six months of 2008 was $195.5 million compared to $71.2 million for the comparable period in 2007. Basic and fully-diluted earnings per share for the first six months of 2008 were $2.23 and $2.21, respectively, compared to $0.83 for each measure for the first six months of 2007.
     Net Production for the first six months of 2008 increased 35% compared to the first six months of 2007 as a result of increased production from our Gulf of Mexico and onshore properties. Net production in the Gulf of Mexico for the first six months of 2008 increased 35% to 60.3 Bcfe from 44.7 Bcfe for the first six months of 2007 primarily reflecting the start up of production from several new projects, most notably, Northwest Nansen (which contributed 6.1 Bcfe for the first six months) and Bass Lite (which contributed 2.4 Bcfe for the first six months), and the impact of our acquisition of MGOM (which contributed 7.7 Bcfe for the first six months). Onshore production for the first six months of 2008 increased 40% to 7.4 Bcfe from 5.3 Bcfe for the first six months of 2007 primarily as a result of our acquisition of additional interests in West Texas (which contributed 1.5 Bcfe for the first six months). Natural gas production for the first six months of 2008 comprised approximately 67% of total net production compared to approximately 68% for the first six months of 2007.
     Natural gas, oil and NGL revenues for the first six months of 2008 increased 76% to $742.1 million compared to $422.3 million for the first six months of 2007 as a result of increased pricing (approximately $169.7 million, net of the effect of hedging), and increased production (approximately $150.1 million).

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     During the first six months of 2008, our revenues reflect a net recognized hedging loss of $81.4 million comprised of $74.9 million in unfavorable cash settlements and an unrealized loss of $6.5 million related to the ineffective portion under SFAS 133. This compares to a net recognized hedging gain of approximately $28.5 million for the first six months of 2007, comprised of $30.5 million in favorable cash settlements and a $2.0 million unrealized loss related to the ineffective portion not eligible for deferral under SFAS 133.
     The effects of hedging activities on our average sales prices were as follows:
                                 
                    Hedging    
    Realized   Unhedged   (Loss) Gain   % Change
Six months ended June 30, 2008:
                               
Natural gas (per Mcf)
  $ 9.49     $ 10.08     $ (0.59 )     (5.9 )%
Oil (per Bbl)
    90.55       109.67       (19.12 )     (17.4 )%
 
                               
Six months ended June 30, 2007:
                               
Natural gas (per Mcf)
  $ 8.11     $ 7.28     $ 0.83       11.4 %
Oil (per Bbl)
    59.76       59.54       0.22       0.4 %
     Other revenues for the first six months of 2008 increased approximately $0.8 million to $3.2 million from $2.4 million for the first six months of 2007 as a result of imputed rental income from the lease of office property acquired by the Company in January 2008, offset by decreased transportation income from our gathering system in West Texas.
     Lease operating expense for the first six months of 2008 increased approximately $28.0 million to $100.1 million from $72.1 million for the first six months of 2007, primarily as a result of start-up production in February 2008 from Bass Lite and Northwest Nansen, the acquisition of MGOM, and the impact of the additional West Texas assets acquired at year-end 2007, which are long-lived and typically carry a higher per-unit LOE. LOE was also impacted by increased property insurance premiums (particularly for windstorm coverage) and a $7.1 million multiple-year retrospective premium adjustment payable to OIL.
     Severance and ad valorem tax for the first six months of 2008 increased approximately $4.0 million to $9.9 million from $5.9 million for the first six months of 2007 due to increased severance as a result of higher oil prices and increased production resulting from the drilling and completion of additional wells and our acquisition of additional interests in West Texas.
     Transportation expense for the first six months of 2008 increased approximately $3.9 million to $7.2 million from $3.3 million for the first six months of 2007 due primarily to commencement of production at Bass Lite, Northwest Nansen, Galveston 352 and High Island A467. Increased production at Pluto also contributed to the increase.
     General and administrative expense for the first six months of 2008 increased approximately $2.2 million to $26.3 million from $24.1 million for the first six months of 2007. Excluding stock compensation expense, G&A for the first six months of 2008 decreased approximately $1.6 million to $19.1 million from $20.7 million for the first six months of 2007. Beginning in 2008, that portion of Lafayette and Midland office expense that is directly related to production activity is classified as LOE, and stock compensation expense attributable to those non-officer employees directly engaged in exploration, development and acquisition activities is capitalized.
     Depreciation, depletion, and amortization expense for the first six months of 2008 increased approximately $68.1 million to $260.8 million from $192.7 million for the first six months of 2007, primarily as a result of increased production from our acquisitions of MGOM and additional interests in West Texas properties and start-up production from Bass Lite and Northwest Nansen.
     Other miscellaneous expense for the first six months of 2008 increased approximately $0.7 million to $1.2 million from $0.5 million for the first six months of 2007.

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     Net interest expense for the first six months of 2008 increased approximately $9.8 million to $35.5 million from $25.7 million for the first six months of 2007 due primarily to an increase in average debt levels to $1.0 billion for the first six months of 2008 as compared to $601.5 million for the first six months of 2007.
     Other income (expense) for the first six months of 2007 reflected a partial cash settlement of $5.4 million received in January 2007 related to our 2006 acquisition of Forest’s Gulf of Mexico operations, net of acquisition-related expenses.
     Income before taxes and minority interest for the first six months of 2008 increased approximately $198.7 million to $304.3 million from $105.6 million for the first six months of 2007 due to increased operating income partially offset by increased net interest expense as discussed above.
     Provision for income taxes for the first six months of 2008 reflected an effective tax rate of 35.7% as compared to 32.6% for the first six months 2007. The increase in our effective tax rate is due primarily to a permanent book-tax difference attributable to post-allocation period activity in 2007 related to our acquisition of Forest’s Gulf of Mexico operations.
Liquidity and Capital Resources
     Net cash provided by operating activities increased by $267.6 million to $551.5 million from $283.9 million for the six months ended June 30, 2008 and 2007, respectively. The increase was a function of higher production, contributing $150.1 million of additional revenue (partially offset by higher lease operating expense), an increase in realized price, contributing $169.7 million of additional revenue and $57.1 million of hurricane-related insurance recoveries.
     As of June 30, 2008, the Company had a working capital deficit of $278.7 million, including current derivative liabilities of $333.4 million and deferred tax assets of $119.7 million. In addition, working capital was negatively impacted by accrued capital expenditures of $210.5 million. We expect that this deficit will be funded by cash flow from operating activities and borrowings under our bank credit facility, as needed.
     Net cash flows used in investing activities increased by $472.0 million to $696.5 million from $224.5 million for the six months ended June 30, 2008 and 2007, respectively. The increase was due primarily to the acquisition of MGOM (including approximately $15.0 million of mid-stream assets reflected in other property), increased capital expenditures attributable to increased activity in our drilling programs and an increase in other property reflecting an investment of approximately $27.4 million in office property. This increase was partially offset by $31.8 million of restricted cash received in January 2007 from the sale of our interest in Garden Banks 422 (Cottonwood).
     Net cash flows provided by financing activities increased by $227.6 million to $167.7 million for the six months ended June 30, 2008 as compared to net cash flows used by financing activities of $59.9 million for the comparable period in 2007. This increase was due primarily to $223.5 million borrowed in January 2008 under our bank credit facility to finance the purchase of MGOM and net increased borrowings of $301.5 million for working capital requirements. This increase was partially offset by proceeds from our issuance in April 2007 of $300.0 million aggregate principal amount of 8% senior notes.
     Capital Expenditures — The following table presents major components of our capital expenditures during the six months ended June 30, 2008.
                 
    In thousands     Percentage  
Capital Expenditures:
               
Acquisitions
  $ 253,680       33 %
Offshore oil and natural gas development
    186,341       24 %
Oil and natural gas exploration
    140,725       18 %
Leasehold Acquisitions
    90,110       12 %
Onshore oil and natural gas development
    49,905       7 %
Other items (primarily capitalized overhead)
    45,011       6 %
 
           
Total capital expenditures
  $ 765,772       100 %
 
           

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     The above table reflects non-cash capital accruals of $51.5 million which are a component of working capital changes in the statement of cash flows.
     Bank Credit Facility — Mariner is party to a revolving line of secured credit with a syndicate of banks led by Union Bank of California, N.A. and BNP Paribas. On June 2, 2008, the bank credit facility was amended to increase the borrowing base to $850.0 million. On January 31, 2008, the bank credit facility was amended to increase the facility’s maximum credit availability to $1.0 billion, including up to $50.0 million in letters of credit, subject to an increased borrowing base of $750.0 million subject to periodic redetermination. The amendment also extended the facility’s term to January 31, 2012; terminated a dedicated $40.0 million letter of credit facility; and added as a permitted use of loan proceeds the funding of Mariner’s purchase of MGOM.
     The bank credit facility is secured by substantially all of our assets. The borrowing base remained at $850.0 million as of June 30, 2008, and is subject to periodic redetermination by the lenders of the Company’s oil and gas reserves and other factors. Any increase in the borrowing base requires the consent of all lenders. As of August 5, 2008, we had $396.0 million in advances outstanding under our bank credit facility and five outstanding letters of credit totaling $7.2 million, of which $4.2 million is required for plugging and abandonment obligations at certain of its offshore fields. As of August 5, 2008, after accounting for the $7.2 million of letters of credit, we had $446.8 million of borrowings available under the credit facility.
     Future Uses of Capital. Our identified needs for liquidity in the future are as follows:
    funding future capital expenditures;
 
    funding hurricane repairs and hurricane-related abandonment operations;
 
    financing any future acquisitions that we may identify;
 
    paying routine operating and administrative expenses; and
 
    paying other commitments comprised largely of cash settlement of hedging obligations and debt service.
     2008 Capital Expenditures. We anticipate that our base operating capital expenditures for 2008 will be approximately $1.0 billion (excluding acquisitions and hurricane-related expenditures), an increase of $250.0 million from budget due to drilling success and cash flow experience during the year. Approximately 53% of the base operating capital program is planned to be allocated to development activities, 44% to exploration activities, and the remainder to other items (primarily capitalized overhead and interest). In addition, we expect to incur additional hurricane-related abandonment costs during 2008 related to Hurricanes Katrina and Rita of approximately $42.0 million, a portion of which may be covered under applicable insurance, although final recovery or settlement is not expected to occur during the next 12 months.
     Future Capital Resources. Our anticipated sources of liquidity in the future are as follows:
    cash flow from operations in future periods,
 
    proceeds under our bank credit facility,
 
    proceeds from insurance policies relating to hurricane repairs, and
 
    proceeds from future capital markets transactions as needed.
     We generally attempt to tailor our operating capital program (excluding acquisitions and hurricane-related expenditures) within our projected operating cash flow during the year so that our operating capital requirements are largely self-sustaining under management’s commodity price assumptions. We anticipate using proceeds under our bank credit facility only for working capital needs or acquisitions, and not generally to fund our capital program. We

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expect to fund future acquisitions on a case by case basis through a combination of bank debt and capital markets activities.
     Based on our current operating plan and assumed price case, we believe that our expected cash flow from operations and continued access to our bank credit facility allow us ample liquidity to conduct our operations as planned for the foreseeable future. However, the timing of expenditures (especially regarding deepwater projects) is unpredictable, and our cash flows are heavily dependent on the oil and natural gas commodity markets. If either oil or natural gas commodity prices decrease materially below management’s assumptions, our ability to finance our planned capital expenditures could be affected negatively. Moreover, amounts available for borrowing under our bank credit facility are largely dependent on our level of estimated proved reserves and our lenders’ outlook for oil and natural gas prices. If either our estimated proved reserves or lenders’ price outlook decreases, amounts available to borrow under our bank credit facility could be reduced. If our cash flows are less than anticipated or amounts available for borrowing are reduced, we may be forced to defer planned capital expenditures.
Off-Balance Sheet Arrangements
     Letters of Credit —Our bank credit facility has a letter of credit facility for up to $50.0 million that is included as a use of the borrowing base. As of August 5, 2008, five such letters of credit totaling $7.2 million were outstanding.
     Please refer to “—Liquidity and Capital Resources—Bank Credit Facility” for further discussion of these letters of credit.
Fair Value Measurement
     We determine fair value for our natural gas and crude oil costless collars using fair value measurements based on the Black-Scholes valuation model, adjusted for credit risk. The credit risk adjustment for collar liabilities is based on our credit quality and the credit risk adjustment for collar assets is based on the credit quality of our counterparty. Such valuations have historically approximated our exit price for such derivatives. We validate the fair value measurements of our collars using a Black-Scholes pricing model using observable market data, to the extent available, and unobservable or adjusted data, if observable data is not available or is not representative of fair value. As of June 30, 2008, our internal calculations of fair value were determined using market data.
     We determine the fair value of our natural gas and crude oil fixed price swaps by reference to forward pricing curves for natural gas and oil futures contracts. The difference between the forward price curve and the contractual fixed price is discounted to the measurement date using a credit-risk adjusted discount rate. The credit risk adjustment for swap liabilities is based on our credit quality and the credit risk adjustment for swap assets is based on the credit quality of our counterparty. Our fair value determinations of our swaps have historically approximated our exit price for such derivatives.
     Due to unavailability of observable volatility data input or use of adjusted implied volatility for our collars, we have determined that fair value measurements of all of our collars are categorized as level 3 in accordance with SFAS No. 157, “Fair Value Measurements” (“SFAS 157”) (see note 11, “Fair Value Measurements”). We have determined that the fair value methodology described above for our swaps is consistent with observable market inputs and have categorized our swaps as level 2 in accordance with SFAS 157.
     During the six-month period ended June 30, 2008, we recorded a decrease in the fair value of our derivative financial instruments of $403.6 million, principally due to the increase in oil and natural gas commodity prices above our swap prices and ceiling prices in our collars. The decrease was comprised of approximately $74.9 million of unfavorable cash hedging settlements during the period reflected in natural gas and oil revenues, an unrealized, non cash, loss due to hedging ineffectiveness under FAS 133 of approximately $6.5 million reflected in natural gas revenues, and a decrease in accumulated other comprehensive loss of approximately $203.2 million, net of income taxes of $124.8 million.
     The continued volatility of oil and natural gas commodity prices will have a material impact on the fair value of our derivatives positions. It is our intent to hold all of our derivatives positions to maturity such that realized gains or losses are generally recognized in income when the hedged natural gas or oil is produced and sold. While the derivatives settlements may decrease (or increase) our effective price realized, the ultimate settlement of our derivatives positions is not expected to materially adversely affect our liquidity, results of operations or cash flows.

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Item 3. Quantitative and Qualitative Disclosures about Market Risk
Commodity Prices and Related Hedging Activities
     Our major market risk exposure continues to be the prices applicable to our oil and natural gas production. The sales price of our production is primarily driven by the prevailing market price. The energy markets historically have been very volatile, and we can reasonably expect that oil and gas prices will be subject to wide fluctuations in the future. In an effort to reduce the effects of the volatility of the price of oil and natural gas on our operations, management has adopted a policy of hedging oil and natural gas prices from time to time primarily through the use of commodity price swap agreements and costless collar arrangements. While the use of these hedging arrangements limits the downside risk of adverse price movements, it also limits future gains from favorable movements. In addition, forward price curves and estimates of future volatility are used to assess and measure the ineffectiveness of our open contracts at the end of each period. If open contracts cease to qualify for hedge accounting, the mark-to-market change in fair value is recognized in oil and natural gas revenue. Loss of hedge accounting and cash flow designation will cause volatility in earnings. The fair values we report in our financial statements change as estimates are revised to reflect actual results, changes in market conditions or other factors, many of which are beyond our control.
     The effects on our oil and natural gas revenues from our hedging activities were as follows:
                                 
    Three Months Ended June 30,     Six Months Ended June 30,  
    2008     2007     2008     2007  
            (In thousands)          
Cash (Loss) Gain on Settlements
  $ (64,607 )   $ 6,868     $ (74,914 )   $ 30,490  
(Loss) Gain on Hedge Ineffectiveness (1)
    (2,550 )     101       (6,474 )     (2,047 )
 
                       
Total
  $ (67,157 )   $ 6,969     $ (81,388 )   $ 28,443  
 
                       
 
(1)   Unrealized (loss) gain recognized in natural gas revenue related to the ineffective portion of open contracts that are not eligible for deferral under SFAS 133 due primarily to the basis differentials between the contract price and the indexed price at the point of sale.
     As of June 30, 2008, we had the following hedge contracts outstanding:
                         
                    June 30,  
            Weighted Average     2008 Fair Value  
Fixed Price Swaps   Quantity     Fixed Price     Liability  
                    (In thousands)  
Natural Gas (MMbtus)
                       
July 1—December 31, 2008
    17,542,192     $ 8.41     $ (88,138 )
January 1—December 31, 2009
    31,642,084     $ 8.48       (121,670 )
Crude Oil (Bbls)
                       
July 1—December 31, 2008
    1,023,040     $ 78.80       (62,517 )
January 1—December 31, 2009
    2,172,210     $ 76.15       (131,664 )
 
                     
Total
                  $ (403,989 )
 
                     
                                 
                            June 30,  
            Weighted Average     Weighted Average     2008 Fair Value  
Costless Collars   Quantity     Floor     Cap     Liability  
                            (In thousands)  
Natural Gas (MMbtus)
                               
July 1—December 31, 2008
    5,704,000     $ 7.83     $ 14.60     $ (4,045 )
Crude Oil (Bbls)
                               
July 1—December 31, 2008
    521,640     $ 61.65     $ 86.80       (27,841 )
 
                             
Total
                          $ (31,886 )
 
                             
     As of June 30, 2008, the Company expects $333.4 million in accumulated other comprehensive income to be reclassified as a decrease to natural gas and oil revenues within the next 12 months. As of August 5, 2008, the Company had not entered into any hedge transactions subsequent to June 30, 2008.

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     Interest Rate Market Risk — Borrowings under our bank credit facility, as discussed under the caption “Liquidity and Capital Resources”, mature on January 31, 2012, and bear interest at either a LIBOR-based rate or a prime-based rate, at our option, plus a specified margin. Both options expose us to risk of earnings loss due to changes in market rates. We have not entered into interest rate hedges that would mitigate such risk. As of June 30, 2008, the interest rate on our outstanding bank debt was 3.70%. If the balance of our bank debt at June 30, 2008 were to remain constant, a 10% change in market interest rates would impact our cash flow by approximately $324,000 per quarter.
Item 4. Controls and Procedures
   Evaluation of Disclosure Controls and Procedures
     Mariner, under the supervision and with the participation of its management, including Mariner’s principal executive officer and principal financial officer, evaluated the effectiveness of its “disclosure controls and procedures,” as such term is defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as of the end of the period covered by this Quarterly Report. Based on that evaluation, our principal executive officer and principal financial officer concluded that Mariner’s disclosure controls and procedures are effective as of June 30, 2008 to ensure that information required to be disclosed by Mariner in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms, and include controls and procedures designed to ensure that information required to be disclosed by us in such reports is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.
     Changes in Internal Controls Over Financial Reporting
     There were no changes that occurred during the quarter ended June 30, 2008 covered by this Quarterly Report on Form 10-Q that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
PART II — OTHER INFORMATION
Item 1A. Risk Factors.
     Please refer to Item 1A of our Annual Report on Form 10-K for the fiscal year ended December 31, 2007.
     Various statements in this Quarterly Report on Form 10-Q (“Quarterly Report”), including those that express a belief, expectation, or intention, as well as those that are not statements of historical fact, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The forward-looking statements may include projections and estimates concerning the timing and success of specific projects and our future production, revenues, income and capital spending. Our forward-looking statements are generally accompanied by words such as “may,” “estimate,” “project,” “predict,” “believe,” “expect,” “anticipate,” “potential,” “plan,” “goal” or other words that convey the uncertainty of future events or outcomes. The forward-looking statements in this Quarterly Report speak only as of the date of this Quarterly Report; we disclaim any obligation to update these statements unless required by law, and we caution you not to rely on them unduly. We have based these forward-looking statements on our current expectations and assumptions about future events. While our management considers these expectations and assumptions to be reasonable, they are inherently subject to significant business, economic, competitive, regulatory and other risks, contingencies and uncertainties, most of which are difficult to predict and many of which are beyond our control. We disclose important factors that could cause our actual results to differ materially from our expectations described in Item 2 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of Part I and elsewhere in this Quarterly Report. These risks, contingencies and uncertainties relate to, among other matters, the following:
    the volatility of oil and natural gas prices;
 
    discovery, estimation, development and replacement of oil and natural gas reserves;
 
    cash flow, liquidity and financial position;

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    business strategy;
 
    amount, nature and timing of capital expenditures, including future development costs;
 
    availability and terms of capital;
 
    timing and amount of future production of oil and natural gas;
 
    availability of drilling and production equipment;
 
    operating costs and other expenses;
 
    prospect development and property acquisitions;
 
    risks arising out of our hedging transactions;
 
    marketing of oil and natural gas;
 
    competition in the oil and natural gas industry;
 
    the impact of weather and the occurrence of natural events and natural disasters such as loop currents, hurricanes, fires, floods and other natural events, catastrophic events and natural disasters;
 
    governmental regulation of the oil and natural gas industry;
 
    environmental liabilities;
 
    developments in oil-producing and natural gas-producing countries;
 
    uninsured or underinsured losses in our oil and natural gas operations;
 
    risks related to our level of indebtedness; and
 
    risks related to significant acquisitions or other strategic transactions, such as failure to realize expected benefits or objectives for future operations.
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.
Issuer Purchases of Equity Securities
                                    
                            Maximum Number (or
                    Total Number of   Approximate Dollar
                    Shares   Value) of
    Total           (or Units)   Shares (or Units)
    Number of   Average   Purchased as   that May Yet Be
    Shares (or   Price Paid   Part of Publicly   Purchased Under the
    Units)   per Share   Announced Plans or   Plans or
Period   Purchased   (or Unit)   Programs   Programs
April 1, 2008 to April 30, 2008 (1)
    33,639     $ 29.60              
May 1, 2008 to May 31, 2008 (1)
    78,648     $ 31.78              
June 1, 2008 to June 30, 2008 (1)
    4,401     $ 34.86              
 
                               
Total
    116,688     $ 31.27              
 
                               
 
(1)   These shares were withheld upon the vesting of employee restricted stock grants in connection with payment of required withholding taxes.

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Item 4. Submission of Matters to a Vote of Security Holders
     On April 30, 2008, we held our annual meeting of stockholders. At the meeting, the following proposals were voted upon and approved:
  1.   Election of directors:
                 
    For   Withhold
Jonathan Ginns (term expires in 2011)
    76,183,083       358,011  
Scott D. Josey (term expires in 2011)
    75,960,988       580,106  
  2.   Ratification of the selection of Deloitte & Touche LLP as independent auditors for the fiscal year ending December 31, 2008:
         
For   Against   Abstain
75,351,519
  1,181,519   8,056
Mariner’s Board of Directors is composed of six directors. Directors in addition to Messrs. Ginns and Josey are Bernard Aronson (term expires 2009), Alan R. Crain, Jr. (term expires 2010), John F. Greene (term expires 2010) and H. Clayton Peterson (term expires 2009); these four directors were not up for reelection at the annual meeting held on April 30, 2008.
Item 6. Exhibits
     
Number   Description
2.1*
  Agreement and Plan of Merger dated as of September 9, 2005 among Forest Oil Corporation, SML Wellhead Corporation, Mariner Energy, Inc. and MEI Sub, Inc. (incorporated by reference to Exhibit 2.1 to Mariner’s Registration Statement on Form S-4 (File No. 333-137441) filed on September 19, 2006).
 
   
2.2*
  Letter Agreement dated as of February 3, 2006 among Forest Oil Corporation, Forest Energy Resources, Inc., Mariner Energy, Inc. and MEI Sub, Inc. amending the transaction agreements (incorporated by reference to Exhibit 2.2 to Mariner’s Registration Statement on Form S-4 (File No. 333-137441) filed on September 19, 2006).
 
   
2.3*
  Letter Agreement, dated as of February 28, 2006, among Forest Oil Corporation, Forest Energy Resources, Inc., Mariner Energy, Inc. and MEI Sub, Inc. amended the transaction agreements (incorporated by reference to Exhibit 2.1 to Mariner’s Form 8-K filed on March 3, 2006).
 
   
2.4*
  Letter Agreement, dated April 12, 2006, among Forest Oil Corporation, Mariner Energy Resources, Inc. and Mariner Energy, Inc. amended the transaction agreements (incorporated by reference to Exhibit 2.1 to Mariner’s Form 8-K filed on April 13, 2006).
 
   
2.5*
  Membership Interest Purchase Agreement by and between Hydro Gulf of Mexico, Inc. and Mariner Energy, Inc., executed December 23, 2007 (incorporated by reference to Exhibit 2.1 to Mariner’s Form 8-K filed on February 5, 2008).
 
   
3.1*
  Second Amended and Restated Certificate of Incorporation of Mariner Energy, Inc., as amended (incorporated by reference to Exhibit 3.1 to Mariner’s Registration Statement on Form S-8 (File No. 333-132800) filed on March 29, 2006).
 
   
3.2*
  Fourth Amended and Restated Bylaws of Mariner Energy, Inc. (incorporated by reference to Exhibit 3.2 to Mariner’s Registration Statement on Form S-4 (File No. 333-129096) filed on October 18, 2005).
 
   
4.1*
  Indenture, dated as of April 30, 2007, among Mariner Energy, Inc., the guarantors party thereto and Wells Fargo Bank, N.A., as trustee (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on May 1, 2007).
 
   
4.2*
  Indenture, dated as of April 24, 2006, among Mariner Energy, Inc., the guarantors party thereto and Wells Fargo Bank, N.A., as trustee (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on April 25, 2006).
4.3*
  Exchange and Registration Rights Agreement, dated as of April 24, 2006, among Mariner Energy, Inc.,

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Number   Description
 
  the guarantors party thereto and the initial purchasers party thereto (incorporated by reference to Exhibit 4.2 to Mariner’s Form 8-K filed on April 25, 2006).
 
   
4.4*
  Amended and Restated Credit Agreement, dated as of March 2, 2006, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto from time to time, as Lenders, and Union Bank of California, N.A., as Administrative Agent and as Issuing Lender (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on March 3, 2006).
 
   
4.5*
  Amendment No. 1 and Consent, dated as of April 7, 2006, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on April 13, 2006).
 
   
4.6*
  Amendment No. 2, dated as of October 13, 2006, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on October 18, 2006).
 
   
4.7*
  Amendment No. 3 and Consent, dated as of April 23, 2007, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on April 24, 2007).
 
   
4.8*
  Amendment No. 4, dated as of August 24, 2007, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on August 27, 2007).
 
   
4.9*
  Amendment No. 5 and Agreement, dated as of January 31, 2008, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on February 5, 2008).
 
   
4.10*
  Master Assignment, Agreement and Amendment No. 6, dated as of June 2, 2008, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on June 3, 2008).
 
   
10.1*
  Underwriting Agreement, dated April 25, 2007, among J.P. Morgan Securities Inc., as Representative of the several Underwriters listed in Schedule 1 thereto, Mariner Energy, Inc., Mariner Energy Resources, Inc., Mariner LP LLC, and Mariner Energy Texas LP (incorporated by reference to Exhibit 1.1 to Mariner’s Form 8-K filed on April 26, 2007).
 
   
10.2*
  Purchase Agreement, dated as of April 19, 2006, among Mariner Energy, Inc., Mariner LP LLC, Mariner Energy Resources, Inc., Mariner Energy Texas LP and the initial purchasers party thereto (incorporated by reference to Exhibit 10.1 to Mariner’s Form 8-K filed on April 25, 2006).
 
   
10.3*+
  Form of Restricted Stock Agreement (2008 Long-Term Performance-Based Restricted Stock Program) under Mariner Energy, Inc. Second Amended and Restated Stock Incentive Plan (incorporated by reference to Exhibit 10.2 to Mariner’s Form 8-K filed on June 19, 2008).
 
   
23.1
  Consent of Ryder Scott Company, L.P.
 
   
31.1
  Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
 
   
31.2
  Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
 
   
32.1
  Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
 
   
32.2
  Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
 
*   Incorporated by reference as indicated.
 
+   Management contract, plan or arrangement.
     In accordance with SEC Release 33-8238, Exhibits 32.1 and 32.2 are being furnished and not filed.

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SIGNATURES
     Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, Mariner Energy, Inc. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on
August 8, 2008.
                       Mariner Energy, Inc.
         
     
  By:   /s/ Scott D. Josey    
    Scott D. Josey,   
    Chairman of the Board, Chief Executive Officer and President   
 
     
  By:   /s/ John H. Karnes    
    John H. Karnes,   
    Senior Vice President, Chief Financial Officer and Treasurer   

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EXHIBIT INDEX
     
Number   Description
2.1*
  Agreement and Plan of Merger dated as of September 9, 2005 among Forest Oil Corporation, SML Wellhead Corporation, Mariner Energy, Inc. and MEI Sub, Inc. (incorporated by reference to Exhibit 2.1 to Mariner’s Registration Statement on Form S-4 (File No. 333-137441) filed on September 19, 2006).
 
   
2.2*
  Letter Agreement dated as of February 3, 2006 among Forest Oil Corporation, Forest Energy Resources, Inc., Mariner Energy, Inc. and MEI Sub, Inc. amending the transaction agreements (incorporated by reference to Exhibit 2.2 to Mariner’s Registration Statement on Form S-4 (File No. 333-137441) filed on September 19, 2006).
 
   
2.3*
  Letter Agreement, dated as of February 28, 2006, among Forest Oil Corporation, Forest Energy Resources, Inc., Mariner Energy, Inc. and MEI Sub, Inc. amended the transaction agreements (incorporated by reference to Exhibit 2.1 to Mariner’s Form 8-K filed on March 3, 2006).
 
   
2.4*
  Letter Agreement, dated April 12, 2006, among Forest Oil Corporation, Mariner Energy Resources, Inc. and Mariner Energy, Inc. amended the transaction agreements (incorporated by reference to Exhibit 2.1 to Mariner’s Form 8-K filed on April 13, 2006).
 
   
2.5*
  Membership Interest Purchase Agreement by and between Hydro Gulf of Mexico, Inc. and Mariner Energy, Inc., executed December 23, 2007 (incorporated by reference to Exhibit 2.1 to Mariner’s Form 8-K filed on February 5, 2008).
 
   
3.1*
  Second Amended and Restated Certificate of Incorporation of Mariner Energy, Inc., as amended (incorporated by reference to Exhibit 3.1 to Mariner’s Registration Statement on Form S-8 (File No. 333-132800) filed on March 29, 2006).
 
   
3.2*
  Fourth Amended and Restated Bylaws of Mariner Energy, Inc. (incorporated by reference to Exhibit 3.2 to Mariner’s Registration Statement on Form S-4 (File No. 333-129096) filed on October 18, 2005).
 
   
4.1*
  Indenture, dated as of April 30, 2007, among Mariner Energy, Inc., the guarantors party thereto and Wells Fargo Bank, N.A., as trustee (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on May 1, 2007).
 
   
4.2*
  Indenture, dated as of April 24, 2006, among Mariner Energy, Inc., the guarantors party thereto and Wells Fargo Bank, N.A., as trustee (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on April 25, 2006).
 
   
4.3*
  Exchange and Registration Rights Agreement, dated as of April 24, 2006, among Mariner Energy, Inc., the guarantors party thereto and the initial purchasers party thereto (incorporated by reference to Exhibit 4.2 to Mariner’s Form 8-K filed on April 25, 2006).
 
   
4.4*
  Amended and Restated Credit Agreement, dated as of March 2, 2006, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto from time to time, as Lenders, and Union Bank of California, N.A., as Administrative Agent and as Issuing Lender (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on March 3, 2006).
 
   
4.5*
  Amendment No. 1 and Consent, dated as of April 7, 2006, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on April 13, 2006).
 
   
4.6*
  Amendment No. 2, dated as of October 13, 2006, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on October 18, 2006).
 
   
4.7*
  Amendment No. 3 and Consent, dated as of April 23, 2007, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on April 24, 2007).
 
   
4.8*
  Amendment No. 4, dated as of August 24, 2007, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on August 27, 2007).

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Number   Description
4.9*
  Amendment No. 5 and Agreement, dated as of January 31, 2008, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on February 5, 2008).
 
   
4.10*
  Master Assignment, Agreement and Amendment No. 6, dated as of June 2, 2008, among Mariner Energy, Inc. and Mariner Energy Resources, Inc., as Borrowers, the Lenders party thereto, and Union Bank of California, N.A., as Administrative Agent for such Lenders and as Issuing Lender for such Lenders (incorporated by reference to Exhibit 4.1 to Mariner’s Form 8-K filed on June 3, 2008).
 
   
10.1*
  Underwriting Agreement, dated April 25, 2007, among J.P. Morgan Securities Inc., as Representative of the several Underwriters listed in Schedule 1 thereto, Mariner Energy, Inc., Mariner Energy Resources, Inc., Mariner LP LLC, and Mariner Energy Texas LP (incorporated by reference to Exhibit 1.1 to Mariner’s Form 8-K filed on April 26, 2007).
 
   
10.2*
  Purchase Agreement, dated as of April 19, 2006, among Mariner Energy, Inc., Mariner LP LLC, Mariner Energy Resources, Inc., Mariner Energy Texas LP and the initial purchasers party thereto (incorporated by reference to Exhibit 10.1 to Mariner’s Form 8-K filed on April 25, 2006).
 
   
10.3*+
  Form of Restricted Stock Agreement (2008 Long-Term Performance-Based Restricted Stock Program) under Mariner Energy, Inc. Second Amended and Restated Stock Incentive Plan (incorporated by reference to Exhibit 10.2 to Mariner’s Form 8-K filed on June 19, 2008).
 
   
23.1
  Consent of Ryder Scott Company, L.P.
 
   
31.1
  Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
 
   
31.2
  Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
 
   
32.1
  Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
 
   
32.2
  Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
 
*   Incorporated by reference as indicated.
 
+   Management contract, plan or arrangement.
     In accordance with SEC Release 33-8238, Exhibits 32.1 and 32.2 are being furnished and not filed.

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