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<!--Modified on: 11/5/2010 2:52:05 PM-->
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        <link:definition>0211 - Disclosure - Comprehensive Income (Loss)</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/StatementsOfChangesInStockholdersEquity" id="StatementsOfChangesInStockholdersEquity">
        <link:definition>0130 - Statement - Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited)</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/LongTermDebt" id="LongTermDebt">
        <link:definition>0203 - Disclosure - Long-Term Debt</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/DerivativeFinancialInstrumentsAndHedgingActivities" id="DerivativeFinancialInstrumentsAndHedgingActivities">
        <link:definition>0208 - Disclosure - Derivative Financial Instruments and Hedging Activities</link:definition>
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        <link:definition>0214 - Disclosure - Supplemental Guarantor Information</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/SegmentInformation" id="SegmentInformation">
        <link:definition>0213 - Disclosure - Segment Information</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/FairValueMeasurement" id="FairValueMeasurement">
        <link:definition>0212 - Disclosure - Fair Value Measurement</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/EarningsPerShare" id="EarningsPerShare">
        <link:definition>0210 - Disclosure - Earnings per Share</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/CommitmentsAndContingencies" id="CommitmentsAndContingencies">
        <link:definition>0209 - Disclosure - Commitments and Contingencies</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/ShareBasedCompensation" id="ShareBasedCompensation">
        <link:definition>0207 - Disclosure - Share-Based Compensation</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/AccrualForFutureAbandonmentLiabilities" id="AccrualForFutureAbandonmentLiabilities">
        <link:definition>0206 - Disclosure - Accrual for Future Abandonment Liabilities</link:definition>
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        <link:definition>0205 - Disclosure - Oil and Gas Properties</link:definition>
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        <link:definition>0204 - Disclosure - Stockholders Equity</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/AcquisitionsAndDispositions" id="AcquisitionsAndDispositions">
        <link:definition>0202 - Disclosure - Acquisitions and Dispositions</link:definition>
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        <link:definition>0140 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/StatementsOfOperations" id="StatementsOfOperations">
        <link:definition>0120 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</link:definition>
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        <link:definition>0111 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)</link:definition>
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      <link:roleType roleURI="http://mariner-energy.com/role/BalanceSheets" id="BalanceSheets">
        <link:definition>0110 - Statement - Condensed Consolidated Balance Sheets (Unaudited)</link:definition>
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