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  <xsd:element abstract="true" id="nbl_DalitIsraelMember" name="DalitIsraelMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="nbl_DebtIssuanceProceedsUsedToExtinguishOutstandingDebt" name="DebtIssuanceProceedsUsedToExtinguishOutstandingDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
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  <xsd:element id="nbl_DeepwaterGulfOfMexicoMoratoriumExpense" name="DeepwaterGulfOfMexicoMoratoriumExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element id="nbl_DeferredCompensationArrangementMostSharesHeldByIndividualPercentage" name="DeferredCompensationArrangementMostSharesHeldByIndividualPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="nbl_DeferredCompensationArrangementMutualFundInvestments" name="DeferredCompensationArrangementMutualFundInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="nbl_DeferredCompensationArrangementPlanDistributionAmount" name="DeferredCompensationArrangementPlanDistributionAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
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  <xsd:element id="nbl_DeferredTaxAssetAndLiabilityBalanceSheetClassificationTableTextBlock" name="DeferredTaxAssetAndLiabilityBalanceSheetClassificationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_DeferredTaxAssetsAbstract" name="DeferredTaxAssetsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element id="nbl_DepreciationDepletionAndAmortizationIncludingDiscontinuedOperations" name="DepreciationDepletionAndAmortizationIncludingDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_DerivativeInstrumentsAndHedgingActivitiesAbstract" name="DerivativeInstrumentsAndHedgingActivitiesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_DerivativeInstrumentsInCashFlowHedingRelationshipsAbstract" name="DerivativeInstrumentsInCashFlowHedingRelationshipsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_DerivativeProductionPeriod" name="DerivativeProductionPeriod" nillable="true" substitutionGroup="xbrli:item" type="us-types:dateStringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_DiegaOffshoreEquatorialGuineaMember" name="DiegaOffshoreEquatorialGuineaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_DisposalGroupIncludingDiscontinuedOperationNetBookValue" name="DisposalGroupIncludingDiscontinuedOperationNetBookValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_DrillingEquipmentAndPurchaseCommitmentsMember" name="DrillingEquipmentAndPurchaseCommitmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_DurationOfDividends" name="DurationOfDividends" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_EffectiveTaxRateReconcilingItemsAbstract" name="EffectiveTaxRateReconcilingItemsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_EquityMethodInvestmentSummarizedFinancialInformationAssetsAndLiabilitiesAbstract" name="EquityMethodInvestmentSummarizedFinancialInformationAssetsAndLiabilitiesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element id="nbl_ExpectedIncreaseInConsolidatedEffectiveIncomeTaxRateDueToChangesInTaxLawsInIsraeli" name="ExpectedIncreaseInConsolidatedEffectiveIncomeTaxRateDueToChangesInTaxLawsInIsraeli" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_ExplorationExpenseAndOtherMember" name="ExplorationExpenseAndOtherMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis" name="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element id="nbl_FairValueLiabilitiesMeasuredOnRecurringBasisCommodityDerivativeFinancialInstrumentsLiabilities" name="FairValueLiabilitiesMeasuredOnRecurringBasisCommodityDerivativeFinancialInstrumentsLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="nbl_FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability" name="FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
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  <xsd:element abstract="true" id="nbl_FinancialAssetsAbstract" name="FinancialAssetsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_FpsoLeaseCommitmentsMember" name="FpsoLeaseCommitmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_FundingOfJointVenturesFutureDrillingAndCompletionCosts" name="FundingOfJointVenturesFutureDrillingAndCompletionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_GeneralAndAdministrativeMember" name="GeneralAndAdministrativeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_GunflintDeepwaterGulfOfMexicoMember" name="GunflintDeepwaterGulfOfMexicoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_ImpairmentsAbstract" name="ImpairmentsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_IncomeTaxBenefitRecognized" name="IncomeTaxBenefitRecognized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
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  <xsd:element id="nbl_InstallmentPaymentAmountForJointVenturePartnership" name="InstallmentPaymentAmountForJointVenturePartnership" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_InstallmentPaymentsDueForConsolAcquisitionMember" name="InstallmentPaymentsDueForConsolAcquisitionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_InterestInDumbartonAndLochranzaFields" name="InterestInDumbartonAndLochranzaFields" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="nbl_InterestIncomeOnRoyaltiesRefunds" name="InterestIncomeOnRoyaltiesRefunds" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_IronHorseMember" name="IronHorseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_IsraelMember" name="IsraelMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_Leviathan1DeepOffshoreIsraelMember" name="Leviathan1DeepOffshoreIsraelMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_LeviathanMember" name="LeviathanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_MainpassMember" name="MainpassMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_MarcellusShaleJointVentureAbstract" name="MarcellusShaleJointVentureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_MaribnoapinnaclesMember" name="MaribnoapinnaclesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_MaximumAmountToBePaidEachCalendarYearForFundingOfFutureDrillingAndCompletionCosts" name="MaximumAmountToBePaidEachCalendarYearForFundingOfFutureDrillingAndCompletionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_NaturalGasCommodityContractMember" name="NaturalGasCommodityContractMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_NaturalGasPriceAgreedUponBenchmarkAverage" name="NaturalGasPriceAgreedUponBenchmarkAverage" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_NetBookValueMember" name="NetBookValueMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_NetLiabilityPositionOfSettledInterestRateSwap" name="NetLiabilityPositionOfSettledInterestRateSwap" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="nbl_NewAlbanyShaleMember" name="NewAlbanyShaleMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_NoanoasouthMember" name="NoanoasouthMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_NonqualifiedStockOptionPlanForNonemployeeDirectors1988Member" name="NonqualifiedStockOptionPlanForNonemployeeDirectors1988Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_NorthSeaAssetsSoldMember" name="NorthSeaAssetsSoldMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_NorthSeaDivestitureAbstract" name="NorthSeaDivestitureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_OilAndGasCashFlowHedgesAbstract" name="OilAndGasCashFlowHedgesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_OilProfitsTaxIsrael" name="OilProfitsTaxIsrael" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_OperatingLeaseCommitmentsMember" name="OperatingLeaseCommitmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_OtherInvesteesMember" name="OtherInvesteesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_OtherNetIncreaseDecreaseComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease" name="OtherNetIncreaseDecreaseComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_OtherOnshoreUsMember" name="OtherOnshoreUsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_OtherOperatingExpenseNetAbstract" name="OtherOperatingExpenseNetAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_OtherProjectsMember" name="OtherProjectsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_OtherRevenuesAbstract" name="OtherRevenuesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_PayableWithImputedInterestDiscount" name="PayableWithImputedInterestDiscount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="nbl_PercentageOfWorkingInterestTerminated" name="PercentageOfWorkingInterestTerminated" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="nbl_PiceanceOnshoreUsMember" name="PiceanceOnshoreUsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_ProductonExpenseAbstract" name="ProductonExpenseAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_PropertyPlantAndEquipmentOtherPropertyUsefulLife" name="PropertyPlantAndEquipmentOtherPropertyUsefulLife" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_RabbiTrustAssetsAbstract" name="RabbiTrustAssetsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_RatioOfFundingOnShareOfFutureDrillingAndCompletionCosts" name="RatioOfFundingOnShareOfFutureDrillingAndCompletionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_RatonMember" name="RatonMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_RetainedEarningsEquityMethodUndistributed" name="RetainedEarningsEquityMethodUndistributed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="nbl_ScheduleOfActivityInSharesOfCommonAndTreasuryStockTableTextBlock" name="ScheduleOfActivityInSharesOfCommonAndTreasuryStockTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_ScheduleOfAllowanceForDoubtfulAccountsTableTextBlock" name="ScheduleOfAllowanceForDoubtfulAccountsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_ScheduleOfDerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceTableTextBlock" name="ScheduleOfDerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_ScheduleOfDisposalGroupsGainOnAssetSaleMidConIllinoisBasinTableTextBlock" name="ScheduleOfDisposalGroupsGainOnAssetSaleMidConIllinoisBasinTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
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  <xsd:element id="nbl_ScheduleOfOtherOperationsInformationTableTextBlock" name="ScheduleOfOtherOperationsInformationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
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  <xsd:element id="nbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAverageStockPricePeriodUsed" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAverageStockPricePeriodUsed" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
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  <xsd:element id="nbl_ShareBasedCompensationArrangementByShareBasedPaymentPlanMaximumNumberOfSharesAuthorized" name="ShareBasedCompensationArrangementByShareBasedPaymentPlanMaximumNumberOfSharesAuthorized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
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  <xsd:element id="nbl_ShareBasedCompensationArrangementByShareBasedPaymentPlanRestrictedStockAwardsAuthorizedForAnnualAndDiscretionaryGrantsPerDirector" name="ShareBasedCompensationArrangementByShareBasedPaymentPlanRestrictedStockAwardsAuthorizedForAnnualAndDiscretionaryGrantsPerDirector" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
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  <xsd:element id="nbl_ShareBasedCompensationArrangementByShareBasedPaymentPlanRestrictedStockAwardsVestingRightsYearTwo" name="ShareBasedCompensationArrangementByShareBasedPaymentPlanRestrictedStockAwardsVestingRightsYearTwo" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_ShareBasedCompensationArrangementByShareBasedPaymentPlanStockOptionsAuthorizedForAnnualAndDiscretionaryGrantsPerDirector" name="ShareBasedCompensationArrangementByShareBasedPaymentPlanStockOptionsAuthorizedForAnnualAndDiscretionaryGrantsPerDirector" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
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  <xsd:element id="nbl_SharesOfCommonStockHeldByRabbiTrust" name="SharesOfCommonStockHeldByRabbiTrust" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="nbl_SharesReceivedFromEmployeesInPaymentOfTaxOnVestedRestrictedStock" name="SharesReceivedFromEmployeesInPaymentOfTaxOnVestedRestrictedStock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_SignificantPurchaseAndSupplyCommitmentsTable" name="SignificantPurchaseAndSupplyCommitmentsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_SouthRatonDeepwaterGulfOfMexicoMember" name="SouthRatonDeepwaterGulfOfMexicoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_StockOptionAndRestrictedStockPlan1992Member" name="StockOptionAndRestrictedStockPlan1992Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_StockPlanForNonemployeeDirectors2005Member" name="StockPlanForNonemployeeDirectors2005Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_SummaryOfSignificantAccountingPoliciesAbstract" name="SummaryOfSignificantAccountingPoliciesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element id="nbl_TotalRabbiTrustPlanAssets" name="TotalRabbiTrustPlanAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
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  <xsd:element id="nbl_TreasuryStockPolicyTextBlock" name="TreasuryStockPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_TreasuryStockSharesRollForward" name="TreasuryStockSharesRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_TristateMember" name="TristateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_TwoWayCollar1Member" name="TwoWayCollar1Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="nbl_UnitedStatesMember" name="UnitedStatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_UnrecognizedTaxBenefitsAbstract" name="UnrecognizedTaxBenefitsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_UsOnshoreAssetsSoldMember" name="UsOnshoreAssetsSoldMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="nbl_WeightedAverageExercisePriceOfAntidilutiveOptions" name="WeightedAverageExercisePriceOfAntidilutiveOptions" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="nbl_YearsRemainingOpenToExaminationAbstract" name="YearsRemainingOpenToExaminationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_YolandaOffshoreEquatorialGuineaMember" name="YolandaOffshoreEquatorialGuineaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="nbl_YoyoOffshoreCameronMember" name="YoyoOffshoreCameronMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
</XBRL>