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  <xsd:element id="lpi_CapitalizedAssetRetirementCost" name="CapitalizedAssetRetirementCost" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_CashSettlementsOfMaturedDerivativeFinancialInstrumentsNet" name="CashSettlementsOfMaturedDerivativeFinancialInstrumentsNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CauseOfRevisionInProvedAndUnprovedReservesAxis" name="CauseOfRevisionInProvedAndUnprovedReservesAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CauseOfRevisionInProvedAndUnprovedReservesDomain" name="CauseOfRevisionInProvedAndUnprovedReservesDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ChangeInNetPresentValueOfDeferredPremiumsForDerivativeFinancialInstruments" name="ChangeInNetPresentValueOfDeferredPremiumsForDerivativeFinancialInstruments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_ChangeinGasGatheringTransportationMarketingandProcessingCostsRelatedPartyCommitments" name="ChangeinGasGatheringTransportationMarketingandProcessingCostsRelatedPartyCommitments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_ChangesDueToTimingDifferencesAndOther" name="ChangesDueToTimingDifferencesAndOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CharitableContributionCarryforwardMember" name="CharitableContributionCarryforwardMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_Collar2January2014December2014Member" name="Collar2January2014December2014Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_Collar2January2015December2015Member" name="Collar2January2015December2015Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_Collar3January2014December2014Member" name="Collar3January2014December2014Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_Collar3January2015December2015Member" name="Collar3January2015December2015Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_Collar4January2014December2014Member" name="Collar4January2014December2014Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CollarJanuary2014December2014Member" name="CollarJanuary2014December2014Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CollarJanuary2015December2015Member" name="CollarJanuary2015December2015Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CollarJanuary2017December2017Member" name="CollarJanuary2017December2017Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CollarMember" name="CollarMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CollarSeptember2013December2013Member" name="CollarSeptember2013December2013Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ComprehensiveProvisionForIncomeTaxesIncludingDiscontinuedOperationsTableTextBlock" name="ComprehensiveProvisionForIncomeTaxesIncludingDiscontinuedOperationsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_ComputerHardwareAndSoftwareMember" name="ComputerHardwareAndSoftwareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ConcentrationOfCreditRiskAndRelatedPartyDisclosuresTextBlock" name="ConcentrationOfCreditRiskAndRelatedPartyDisclosuresTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ConcentrationRiskNumberOfMajorCustomers" name="ConcentrationRiskNumberOfMajorCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ConcentrationRiskNumberofAdditionalMajorCustomersOverSalesConcentration" name="ConcentrationRiskNumberofAdditionalMajorCustomersOverSalesConcentration" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ConcentrationRiskNumberofJointInterestPartners" name="ConcentrationRiskNumberofJointInterestPartners" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CostAndExpensesDiscontinuedOperationsAbstract" name="CostAndExpensesDiscontinuedOperationsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CustomerFourMember" name="CustomerFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CustomerOneMember" name="CustomerOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CustomerThreeMember" name="CustomerThreeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CustomerTwoMember" name="CustomerTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_CustomerfiveMember" name="CustomerfiveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_DalhartBasinAcreageMember" name="DalhartBasinAcreageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DebtInstrumentCollateralAmountPercentage" name="DebtInstrumentCollateralAmountPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DebtInstrumentCovenantCurrentRatio" name="DebtInstrumentCovenantCurrentRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DebtInstrumentCovenantMinimumConsolidatedInterestCoverageRatio" name="DebtInstrumentCovenantMinimumConsolidatedInterestCoverageRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DebtInstrumentPercentageOfOriginalPrincipalAmountOutstandingAfterRedemptionFromEquityOfferings" name="DebtInstrumentPercentageOfOriginalPrincipalAmountOutstandingAfterRedemptionFromEquityOfferings" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DebtInstrumentRedeemedByEquityOfferingRedemptionPricePercentage" name="DebtInstrumentRedeemedByEquityOfferingRedemptionPricePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DebtInstrumentRedemptionPeriodFollowingClosingDateOfEquityOffering" name="DebtInstrumentRedemptionPeriodFollowingClosingDateOfEquityOffering" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DebtInstrumentRedemptionPricePercentageofAggregatePrincipalAmountThatCanBeRedeemedByEquityOffering" name="DebtInstrumentRedemptionPricePercentageofAggregatePrincipalAmountThatCanBeRedeemedByEquityOffering" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DebtInstrumentRedemptionPrincipalAmountOutstandingThresholdDays" name="DebtInstrumentRedemptionPrincipalAmountOutstandingThresholdDays" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DebtInstrumentRedemptionPrincipalAmountOutstandingThresholdPercentage" name="DebtInstrumentRedemptionPrincipalAmountOutstandingThresholdPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_Decreaseinoilandgaspropertyfullcost" name="Decreaseinoilandgaspropertyfullcost" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lpi_DeferredFinanceCostsAmortizationExpenseAfterYearFive" name="DeferredFinanceCostsAmortizationExpenseAfterYearFive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DeferredFinanceCostsAmortizationExpenseNextTwelveMonths" name="DeferredFinanceCostsAmortizationExpenseNextTwelveMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DeferredFinanceCostsAmortizationExpenseYearFive" name="DeferredFinanceCostsAmortizationExpenseYearFive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DeferredFinanceCostsAmortizationExpenseYearFour" name="DeferredFinanceCostsAmortizationExpenseYearFour" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DeferredFinanceCostsAmortizationExpenseYearThree" name="DeferredFinanceCostsAmortizationExpenseYearThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DeferredFinanceCostsAmortizationExpenseYearTwo" name="DeferredFinanceCostsAmortizationExpenseYearTwo" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lpi_DeferredFinanceCostsFutureAmortizationExpenseAbstract" name="DeferredFinanceCostsFutureAmortizationExpenseAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DeferredIncomeTaxStockBasedCompensationTaxDeficiency" name="DeferredIncomeTaxStockBasedCompensationTaxDeficiency" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_DeferredPremiumAssetLiabilityMember" name="DeferredPremiumAssetLiabilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_DeferredPremiumsMember" name="DeferredPremiumsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DeferredTaxLiabilitiesNetBeforeValuationAllowance" name="DeferredTaxLiabilitiesNetBeforeValuationAllowance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DepreciationDepletionAndAmortizationContinuingAndDiscontinuedOperations" name="DepreciationDepletionAndAmortizationContinuingAndDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemEnergyYear1" name="DerivativeAmountofHedgedItemEnergyYear1" nillable="true" substitutionGroup="xbrli:item" type="num:energyItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemEnergyYear2" name="DerivativeAmountofHedgedItemEnergyYear2" nillable="true" substitutionGroup="xbrli:item" type="num:energyItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemEnergyYear3" name="DerivativeAmountofHedgedItemEnergyYear3" nillable="true" substitutionGroup="xbrli:item" type="num:energyItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemVolumeCeilingYear1" name="DerivativeAmountofHedgedItemVolumeCeilingYear1" nillable="true" substitutionGroup="xbrli:item" type="num:volumeItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemVolumeCeilingYear2" name="DerivativeAmountofHedgedItemVolumeCeilingYear2" nillable="true" substitutionGroup="xbrli:item" type="num:volumeItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemVolumeCeilingYear3" name="DerivativeAmountofHedgedItemVolumeCeilingYear3" nillable="true" substitutionGroup="xbrli:item" type="num:volumeItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemVolumeFloorYear1" name="DerivativeAmountofHedgedItemVolumeFloorYear1" nillable="true" substitutionGroup="xbrli:item" type="num:volumeItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemVolumeFloorYear2" name="DerivativeAmountofHedgedItemVolumeFloorYear2" nillable="true" substitutionGroup="xbrli:item" type="num:volumeItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemVolumeFloorYear3" name="DerivativeAmountofHedgedItemVolumeFloorYear3" nillable="true" substitutionGroup="xbrli:item" type="num:volumeItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemVolumeYear1" name="DerivativeAmountofHedgedItemVolumeYear1" nillable="true" substitutionGroup="xbrli:item" type="num:volumeItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemVolumeYear2" name="DerivativeAmountofHedgedItemVolumeYear2" nillable="true" substitutionGroup="xbrli:item" type="num:volumeItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAmountofHedgedItemVolumeYear3" name="DerivativeAmountofHedgedItemVolumeYear3" nillable="true" substitutionGroup="xbrli:item" type="num:volumeItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAssetFairValueGrossAssetIncludingNotSubjecttoMasterNettingArrangementCurrent" name="DerivativeAssetFairValueGrossAssetIncludingNotSubjecttoMasterNettingArrangementCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAssetFairValueGrossAssetIncludingNotSubjecttoMasterNettingArrangementNoncurrent" name="DerivativeAssetFairValueGrossAssetIncludingNotSubjecttoMasterNettingArrangementNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAssetFairValueGrossLiabilityandObligationtoReturnCashOffsetCurrent" name="DerivativeAssetFairValueGrossLiabilityandObligationtoReturnCashOffsetCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAssetFairValueGrossLiabilityandObligationtoReturnCashOffsetNoncurrent" name="DerivativeAssetFairValueGrossLiabilityandObligationtoReturnCashOffsetNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAverageCapPriceYear1" name="DerivativeAverageCapPriceYear1" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAverageCapPriceYear2" name="DerivativeAverageCapPriceYear2" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAverageCapPriceYear3" name="DerivativeAverageCapPriceYear3" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAverageFloorPriceYear1" name="DerivativeAverageFloorPriceYear1" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAverageFloorPriceYear2" name="DerivativeAverageFloorPriceYear2" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeAverageFloorPriceYear3" name="DerivativeAverageFloorPriceYear3" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeDeferredPremium" name="DerivativeDeferredPremium" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeDeferredPremiumPaidEarlyTermination" name="DerivativeDeferredPremiumPaidEarlyTermination" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lpi_DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDue" name="DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueDueinThreeYears" name="DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueDueinThreeYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueDueinTwoYears" name="DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueDueinTwoYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lpi_DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueFiscalYearMaturityAbstract" name="DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueFiscalYearMaturityAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueNextTwelveMonths" name="DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueNextTwelveMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueinFourYears" name="DerivativeFinancialInstrumentDeferredPremiumFuturePaymentsDueinFourYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeLiabilityFairValueGrossAssetandRighttoReclaimCashOffsetCurrent" name="DerivativeLiabilityFairValueGrossAssetandRighttoReclaimCashOffsetCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeLiabilityFairValueGrossAssetandRighttoReclaimCashOffsetNoncurrent" name="DerivativeLiabilityFairValueGrossAssetandRighttoReclaimCashOffsetNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjecttoMasterNettingArrangementCurrent" name="DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjecttoMasterNettingArrangementCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjecttoMasterNettingArrangementNoncurrent" name="DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjecttoMasterNettingArrangementNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DerivativesTransferredonSaleofAssetsTableTextBlock" name="DerivativesTransferredonSaleofAssetsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DiscountRateFullCostCeiling" name="DiscountRateFullCostCeiling" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DisposalGroupIncludingDiscontinuedOperationDepreciationDepletionAndAmortization" name="DisposalGroupIncludingDiscontinuedOperationDepreciationDepletionAndAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_DisposalGroupIncludingDiscontinuedOperationNonOperatingExpenseIncome" name="DisposalGroupIncludingDiscontinuedOperationNonOperatingExpenseIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_DisposalGroupIncludingDiscontinuedOperationProducingProperty" name="DisposalGroupIncludingDiscontinuedOperationProducingProperty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_DisposalGroupsDiscontinuedOperationsCostsAndExpensesAmount" name="DisposalGroupsDiscontinuedOperationsCostsAndExpensesAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_DisposalGroupsMidstreamServiceCosts" name="DisposalGroupsMidstreamServiceCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_DisposalGroupsMidstreamServiceRevenue" name="DisposalGroupsMidstreamServiceRevenue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_DrillingContractsMember" name="DrillingContractsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_DrillingOfNewWellsMember" name="DrillingOfNewWellsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_DueToRelatedPartiesMinimumVolumeCommitmentPayable" name="DueToRelatedPartiesMinimumVolumeCommitmentPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_DuetoRelatedPartiesCapitalContributionPayable" name="DuetoRelatedPartiesCapitalContributionPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lpi_EmploymentTerminationAxis" name="EmploymentTerminationAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_EmploymentTerminationDomain" name="EmploymentTerminationDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_EnerVestMember" name="EnerVestMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_EquityMethodInvestmentOwnershipPercentageHeldByInvestmentPartner" name="EquityMethodInvestmentOwnershipPercentageHeldByInvestmentPartner" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_ExpectedCashPaymentsRequiredOnDeferredPremiumContractsTableTextBlock" name="ExpectedCashPaymentsRequiredOnDeferredPremiumContractsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_February152013Member" name="February152013Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_February2014AwardsMember" name="February2014AwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_February272014Member" name="February272014Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_February32012Member" name="February32012Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_FebruaryTwoThousandThirteenAwardsMember" name="FebruaryTwoThousandThirteenAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_FebruaryTwoThousandTwelveAwardsMember" name="FebruaryTwoThousandTwelveAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_FinancingCommitmentsMember" name="FinancingCommitmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_FourthAmendedandRestatedCreditAgreementMember" name="FourthAmendedandRestatedCreditAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_FullCostMethodofAccountingforInvestmentsinOilandGasPropertiesUnweightedArithmeticAverageRate" name="FullCostMethodofAccountingforInvestmentsinOilandGasPropertiesUnweightedArithmeticAverageRate" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_GainLossonDispositionofAssetsContinuingandDiscontinuedOperations" name="GainLossonDispositionofAssetsContinuingandDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lpi_GasBalancingAssetLiabilityPeriodIncreaseDecreaseNet" name="GasBalancingAssetLiabilityPeriodIncreaseDecreaseNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_GasGatheringTransportationMarketingandProcessingCostsExcludingCostsofPurchasedOil" name="GasGatheringTransportationMarketingandProcessingCostsExcludingCostsofPurchasedOil" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_GasGatheringTransportationMarketingandProcessingCostsRelatedParty" name="GasGatheringTransportationMarketingandProcessingCostsRelatedParty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_IncomeTaxExpenseBenefit1Abstract" name="IncomeTaxExpenseBenefit1Abstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_IncomeTaxReconciliationStockBasedCompensationTaxDeficiency" name="IncomeTaxReconciliationStockBasedCompensationTaxDeficiency" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_IncreaseDecreaseInFairValueOfPerformanceUnitAwards" name="IncreaseDecreaseInFairValueOfPerformanceUnitAwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_IncreaseDecreaseInStandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAbstract" name="IncreaseDecreaseInStandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_IncreaseDecreaseInUndistributedRevenueAndAccruedRoyalties" name="IncreaseDecreaseInUndistributedRevenueAndAccruedRoyalties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_IncreaseDecreaseinInvestmentswithAffiliates" name="IncreaseDecreaseinInvestmentswithAffiliates" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_JointInterestExpenseReimbursementTableTextBlock" name="JointInterestExpenseReimbursementTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_JointlyOwnedOilAndNaturalGasPropertyFeesReceivedForOperation" name="JointlyOwnedOilAndNaturalGasPropertyFeesReceivedForOperation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lpi_LeaseOperatingExpenseAccrual" name="LeaseOperatingExpenseAccrual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lpi_LinefillMember" name="LinefillMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_LineofCreditFacilityAggregateElectedCommitment" name="LineofCreditFacilityAggregateElectedCommitment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lpi_LongTermIncentivePlanMember" name="LongTermIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_MaterialsandSuppliesMember" name="MaterialsandSuppliesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_MedallionGatheringAndProcessingLlcMember" name="MedallionGatheringAndProcessingLlcMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_MidlandBasinMember" name="MidlandBasinMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_MidstreamServiceAssets" name="MidstreamServiceAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lpi_MidstreamServiceAssetsMember" name="MidstreamServiceAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_MidstreamServiceAssetsPolicyTextBlock" name="MidstreamServiceAssetsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_NaturalGasDeferredPremiumsMember" name="NaturalGasDeferredPremiumsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_NaturalGasDerivativesMember" name="NaturalGasDerivativesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_NumberOfLocationsInNewProvedUndevelopedLocations" name="NumberOfLocationsInNewProvedUndevelopedLocations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_NumberofProvedUndevelopedLocationsRedetermined" name="NumberofProvedUndevelopedLocationsRedetermined" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_NumberofProvedandUndevelopedLocationsRemoved" name="NumberofProvedandUndevelopedLocationsRemoved" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_OilAndGasPropertiesFullCostMethodGrossAbstract" name="OilAndGasPropertiesFullCostMethodGrossAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_OilDeferredPremiumsMember" name="OilDeferredPremiumsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_OilDerivativesMember" name="OilDerivativesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_OtherAssetsCurrentNotSeparatelyDisclosed" name="OtherAssetsCurrentNotSeparatelyDisclosed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_OtherAssetsNoncurrentNotSeparatelyDisclosed" name="OtherAssetsNoncurrentNotSeparatelyDisclosed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lpi_OtherCapitalizedPropertyAndEquipmentExcludingLandMember" name="OtherCapitalizedPropertyAndEquipmentExcludingLandMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_OtherFixedAssetsPolicyTextBlock" name="OtherFixedAssetsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_OtherLiabilitiesCurrentNotSeparatelyDisclosed" name="OtherLiabilitiesCurrentNotSeparatelyDisclosed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lpi_OtherLiabilitiesNoncurrentNotSeparatelyDisclosed" name="OtherLiabilitiesNoncurrentNotSeparatelyDisclosed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lpi_OtherThirdPartiesMember" name="OtherThirdPartiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PartnerFourMember" name="PartnerFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PartnerOneMember" name="PartnerOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PartnerThreeMember" name="PartnerThreeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PartnerTwoMember" name="PartnerTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_PaymentsToAcquirePipelineAndGatheringAssets" name="PaymentsToAcquirePipelineAndGatheringAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lpi_PercentageOfProvedReservesEstimatedByIndependentReserveEngineers" name="PercentageOfProvedReservesEstimatedByIndependentReserveEngineers" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PerformancePricingAndOtherChangesMember" name="PerformancePricingAndOtherChangesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PerformanceUnitAwardsMember" name="PerformanceUnitAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PeriodOfContinuousEmploymentFourFullYearMember" name="PeriodOfContinuousEmploymentFourFullYearMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PeriodOfContinuousEmploymentLessThanOneFullYearMember" name="PeriodOfContinuousEmploymentLessThanOneFullYearMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PeriodOfContinuousEmploymentOneFullYearMember" name="PeriodOfContinuousEmploymentOneFullYearMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PeriodOfContinuousEmploymentThreeFullYearMember" name="PeriodOfContinuousEmploymentThreeFullYearMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PeriodOfContinuousEmploymentTwoFullYearMember" name="PeriodOfContinuousEmploymentTwoFullYearMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PermianBasinAndGraniteWashMember" name="PermianBasinAndGraniteWashMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PermianBasinPlayMember" name="PermianBasinPlayMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_PipelineAndGasGatheringAssets" name="PipelineAndGasGatheringAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_PipelineAndGasGatheringAssetsNet" name="PipelineAndGasGatheringAssetsNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lpi_PremiumsPaidForDerivativeFinancialInstruments" name="PremiumsPaidForDerivativeFinancialInstruments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lpi_ProceedsFromCashSettlementsEarlyTerminationsofDerivativeFinancialInstrumentsNet" name="ProceedsFromCashSettlementsEarlyTerminationsofDerivativeFinancialInstrumentsNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_ProceedsFromSaleofOilandGasPropertyAndEquipmentGross" name="ProceedsFromSaleofOilandGasPropertyAndEquipmentGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_ProvedDevelopedReservesRollForward" name="ProvedDevelopedReservesRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ProvedDevelopedandUndevelopedReserveExtensionsDiscoveriesandAdditionsEnergy" name="ProvedDevelopedandUndevelopedReserveExtensionsDiscoveriesandAdditionsEnergy" nillable="true" substitutionGroup="xbrli:item" type="num:energyItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_ProvedUndevelopedPropertiesMember" name="ProvedUndevelopedPropertiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_ProvedUndevelopedReservesRollForward" name="ProvedUndevelopedReservesRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_ProvedandUnprovedOilandNaturalGasPropertiesinGlasscockCountyTexasMember" name="ProvedandUnprovedOilandNaturalGasPropertiesinGlasscockCountyTexasMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_ProvedandUnprovedOilandNaturalGasPropertiesinReaganCountyTexasMemberMember" name="ProvedandUnprovedOilandNaturalGasPropertiesinReaganCountyTexasMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PurchasedOilSalesMember" name="PurchasedOilSalesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PurchasedOilandOtherProductsSalesMember" name="PurchasedOilandOtherProductsSalesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_PutSeptember2013December2013Member" name="PutSeptember2013December2013Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_RestructuringandRelatedCostExpectedNumberofConsultantPositionsEliminated" name="RestructuringandRelatedCostExpectedNumberofConsultantPositionsEliminated" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_ResultsOfOperationsExpenseFromOilAndGasOtherCostsAbstract" name="ResultsOfOperationsExpenseFromOilAndGasOtherCostsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_RevenuesDiscontinuedOperationsAbstract" name="RevenuesDiscontinuedOperationsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_SaleofStockByExistingShareholdersNumberofShares" name="SaleofStockByExistingShareholdersNumberofShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_SaleofStockPricePerShareNetOfUnderwritingDiscount" name="SaleofStockPricePerShareNetOfUnderwritingDiscount" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ScheduleOfAmountIncurredAndChargedToInterestExpensesTableTextBlock" name="ScheduleOfAmountIncurredAndChargedToInterestExpensesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ScheduleOfDefinedContributionPlansDisclosuresTableTextBlock" name="ScheduleOfDefinedContributionPlansDisclosuresTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ScheduleofDerivativeInstrumentsCashSettlementsAndPaymentsTextBlock" name="ScheduleofDerivativeInstrumentsCashSettlementsAndPaymentsTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ScheduleofDerivativeInstrumentsUnwoundonSaleofAssetsTableTextBlock" name="ScheduleofDerivativeInstrumentsUnwoundonSaleofAssetsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ScheduleofIncomeTaxDeficiencyfromSharebasedCompensationTableTextBlock" name="ScheduleofIncomeTaxDeficiencyfromSharebasedCompensationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ScheduleofSharebasePaymentAwardEquityInstrumentsOtherThanOptionsValuationAssumptionsTableTextBlock" name="ScheduleofSharebasePaymentAwardEquityInstrumentsOtherThanOptionsValuationAssumptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_SeniorNote5.625PercentDue2022Member" name="SeniorNote5.625PercentDue2022Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_SeniorNotes7.375PercentDue2022Member" name="SeniorNotes7.375PercentDue2022Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_SeniorNotes9.5PercentDue2019Member" name="SeniorNotes9.5PercentDue2019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_SeniorNotes9.5PercentIssuedJanuary2011Member" name="SeniorNotes9.5PercentIssuedJanuary2011Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_SeniorNotes9.5PercentIssuedOctober2011Member" name="SeniorNotes9.5PercentIssuedOctober2011Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_SeniorNotesSevenPointThreeSevenFivePercentDueTwoThousandTwentyTwoMember" name="SeniorNotesSevenPointThreeSevenFivePercentDueTwoThousandTwentyTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_SeniorSecuredCreditFacilityMember" name="SeniorSecuredCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedWeightedAverageRemainingContractualTerm" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedWeightedAverageRemainingContractualTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageRemainingContractualTerm" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageRemainingContractualTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ShareBasedCompensationScheduleOfVestingRightsOptionsTableTextBlock" name="ShareBasedCompensationScheduleOfVestingRightsOptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsCumulativePercentage" name="SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsCumulativePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsCashPaidperUnit" name="SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsCashPaidperUnit" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsTaxBasis" name="SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsTaxBasis" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lpi_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsTaxBenefit" name="SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsTaxBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lpi_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm" name="SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_SharebasedCompensationArrangementbySharebasedPaymentAwardPlanModificationNumberofOfficersAffected" name="SharebasedCompensationArrangementbySharebasedPaymentAwardPlanModificationNumberofOfficersAffected" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_SharebasedCompensationArrangementbySharebasedPaymentAwardVestedAwardsExpirationPeriod" name="SharebasedCompensationArrangementbySharebasedPaymentAwardVestedAwardsExpirationPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_SwapAugust2013December2013Member" name="SwapAugust2013December2013Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_SwapJanuary2014December2014Member" name="SwapJanuary2014December2014Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_TaxYear2026Member" name="TaxYear2026Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_TaxYear2027Member" name="TaxYear2027Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_TaxYear2028Member" name="TaxYear2028Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_TaxYear2029Member" name="TaxYear2029Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_TaxYear2030Member" name="TaxYear2030Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_TaxYearThereafterMember" name="TaxYearThereafterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_TerminationCausedByDeathMember" name="TerminationCausedByDeathMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_TerminationWithoutCauseMember" name="TerminationWithoutCauseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ThresholdPeriodPastDueforAccountsReceivable" name="ThresholdPeriodPastDueforAccountsReceivable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_ThresholdPeriodPastDueforReviewofAccountsReceivable" name="ThresholdPeriodPastDueforReviewofAccountsReceivable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_TransferredOnDivestitureMember" name="TransferredOnDivestitureMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_UnderlyingDerivativeVolumeYear1" name="UnderlyingDerivativeVolumeYear1" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_UnderlyingDerivativeVolumeYear2" name="UnderlyingDerivativeVolumeYear2" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_UnderlyingDerivativeVolumeYear3" name="UnderlyingDerivativeVolumeYear3" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element id="lpi_UndistributedRevenueAndAccruedRoyaltiesCurrent" name="UndistributedRevenueAndAccruedRoyaltiesCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lpi_UnwoundonDivestitureMember" name="UnwoundonDivestitureMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VariableInterestEntityAbstract" name="VariableInterestEntityAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_VariableInterestEntitySuperMajorityVotingPercentagRequiredForKeyDecisions" name="VariableInterestEntitySuperMajorityVotingPercentagRequiredForKeyDecisions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="lpi_VariableInterestEntityTextBlock" name="VariableInterestEntityTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VestingAlternativeFive3YearsFromGrantDateMember" name="VestingAlternativeFive3YearsFromGrantDateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VestingAlternativeFourOneYearFromGrantDateMember" name="VestingAlternativeFourOneYearFromGrantDateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VestingAlternativeOneAnnuallyAfterReorganizationGrantDateMember" name="VestingAlternativeOneAnnuallyAfterReorganizationGrantDateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VestingAlternativeOneReorganizationGrantDateMember" name="VestingAlternativeOneReorganizationGrantDateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VestingAlternativeThreeVestingInThreeYearsMember" name="VestingAlternativeThreeVestingInThreeYearsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VestingAlternativeThreeVestingInTwoYearsMember" name="VestingAlternativeThreeVestingInTwoYearsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VestingAlternativeTwoOneYearFromGrantDateMember" name="VestingAlternativeTwoOneYearFromGrantDateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VestingAlternativeTwoThreeYearsFromGrantDateMember" name="VestingAlternativeTwoThreeYearsFromGrantDateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lpi_VestingAlternativeTwoTwoYearsFromGrantDateMember" name="VestingAlternativeTwoTwoYearsFromGrantDateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>


