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  <xs:element id="sm_SharesSettledGrossOfSharesForTaxWithholdings" abstract="false" name="SharesSettledGrossOfSharesForTaxWithholdings" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sm_NumberofSharesRepresentedbyEachRSU" abstract="false" name="NumberofSharesRepresentedbyEachRSU" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsRetirementVestingIncrement" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsRetirementVestingIncrement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sm_ShareBasedCompensationArrangementByShareBasedPaymentAwardRetirementIncrementVestingPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardRetirementIncrementVestingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sm_EmployeeStockPurchasePlanMember" abstract="true" name="EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sm_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscription" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscription" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sm_PeriodofApplicabilityAxis" abstract="true" name="PeriodofApplicabilityAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sm_PeriodofApplicabilityDomain" abstract="true" name="PeriodofApplicabilityDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sm_Priorto2014Member" abstract="true" name="Priorto2014Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sm_After2014Member" abstract="true" name="After2014Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sm_A401KPlanMember" abstract="true" name="A401KPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sm_EPSegmentMember" abstract="true" name="EPSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_LeaseOperatingExpenseMember" abstract="true" name="LeaseOperatingExpenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_TransportationCostsMember" abstract="true" name="TransportationCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_ProductionTaxesMember" abstract="true" name="ProductionTaxesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_AdValoremTaxMember" abstract="true" name="AdValoremTaxMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_OtherSecuritiesMember" abstract="true" name="OtherSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sm_DefinedBenefitPlanPlanAssetsBenefitsPaidExcludingSettlements" abstract="false" name="DefinedBenefitPlanPlanAssetsBenefitsPaidExcludingSettlements" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sm_DefinedBenefitPlanAccumulatedUnfundedBenefitObligation" abstract="false" name="DefinedBenefitPlanAccumulatedUnfundedBenefitObligation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sm_PensionAndOtherPostRetirementBenefitPlansGainLossAmortizationThreshold" abstract="false" name="PensionAndOtherPostRetirementBenefitPlansGainLossAmortizationThreshold" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sm_DefinedBenefitPlanTotalNetBenefitCost" abstract="false" name="DefinedBenefitPlanTotalNetBenefitCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sm_DueFromJointInterestOwnersMember" abstract="true" name="DueFromJointInterestOwnersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sm_OtherReceivablesMember" abstract="true" name="OtherReceivablesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sm_AccruedRevenueAndSeveranceTaxPayable" abstract="false" name="AccruedRevenueAndSeveranceTaxPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sm_UintaBasinAcquisitionMember" abstract="true" name="UintaBasinAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_XCLAcquisitionMember" abstract="true" name="XCLAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_AltamontOptionAssetsMember" abstract="true" name="AltamontOptionAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_Q22023DawsonAndMartinCountyAssetAcquisitionMember" abstract="true" name="Q22023DawsonAndMartinCountyAssetAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_UndividedInterestPercentageAcquiredByOthers" abstract="false" name="UndividedInterestPercentageAcquiredByOthers" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sm_AcquisitionClosingDate" abstract="false" name="AcquisitionClosingDate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:dateItemType"/>
  <xs:element id="sm_UndividedInterestPercentageAcquired" abstract="false" name="UndividedInterestPercentageAcquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sm_NetAcresAcquired" abstract="false" name="NetAcresAcquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:areaItemType"/>
  <xs:element id="sm_AssetAcquisitionAdjustedPurchasePrice" abstract="false" name="AssetAcquisitionAdjustedPurchasePrice" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sm_RevenuesAndRoyaltiesPayableAndOtherLiabilitiesNet" abstract="false" name="RevenuesAndRoyaltiesPayableAndOtherLiabilitiesNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sm_A2023UptonCountryNonMonetaryTradeMember" abstract="true" name="A2023UptonCountryNonMonetaryTradeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
