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  <xs:element id="sm_DerivativeOilBasisSwapTypeWeightedAverageContractPrice" abstract="false" name="DerivativeOilBasisSwapTypeWeightedAverageContractPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="srt-types:perUnitItemType"/>
  <xs:element id="sm_DerivativeCalendarMonthAverageRollDifferentialSwapTypeWeightedAverageContractPrice" abstract="false" name="DerivativeCalendarMonthAverageRollDifferentialSwapTypeWeightedAverageContractPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="srt-types:perUnitItemType"/>
  <xs:element id="sm_DerivativeGasBasisSwapTypeWeightedAverageContractPrice" abstract="false" name="DerivativeGasBasisSwapTypeWeightedAverageContractPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="srt-types:perUnitItemType"/>
  <xs:element id="sm_OilContractsMember" abstract="true" name="OilContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_GasContractsMember" abstract="true" name="GasContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_NGLContractsMember" abstract="true" name="NGLContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_DerivativeSettlementGainOrLoss" abstract="false" name="DerivativeSettlementGainOrLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sm_PercentageofProvedPropertySecuredforCreditFacilityBorrowing" abstract="false" name="PercentageofProvedPropertySecuredforCreditFacilityBorrowing" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <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_A2025SMEquityIncentiveCompensationPlanMember" abstract="true" name="A2025SMEquityIncentiveCompensationPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_A2024CivitasLongTermIncentivePlanMember" abstract="true" name="A2024CivitasLongTermIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
