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  <xs:element id="oxy_ScheduleOfFairValueAssumptionsForSharedBasedCompensationPerformanceBasedAwardsTableTextBlock" abstract="false" name="ScheduleOfFairValueAssumptionsForSharedBasedCompensationPerformanceBasedAwardsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="oxy_EquityMethodInvestmentSummarizedFinancialInformationAssetsandLiabilitiesandEquityAbstract" abstract="true" name="EquityMethodInvestmentSummarizedFinancialInformationAssetsandLiabilitiesandEquityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="oxy_OperatingandFinanceLeaseLiabilitiesPaymentsDueAbstract" abstract="true" name="OperatingandFinanceLeaseLiabilitiesPaymentsDueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="oxy_ScheduleOfOwnershipInterestsInEquityInvestmentsTableTextBlock" abstract="false" name="ScheduleOfOwnershipInterestsInEquityInvestmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="oxy_NPLSitesMember" abstract="true" name="NPLSitesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="oxy_SeniorDebentures8.450PercentDue2029Member" abstract="true" name="SeniorDebentures8.450PercentDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="oxy_TransportationAndGatheringExpense" abstract="false" name="TransportationAndGatheringExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oxy_EnvironmentalRemediationContingencyNumberOfSiteCategories" abstract="false" name="EnvironmentalRemediationContingencyNumberOfSiteCategories" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="oxy_DefinedBenefitPlanPlanAssetsAmountNetOfPayables" abstract="false" name="DefinedBenefitPlanPlanAssetsAmountNetOfPayables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oxy_AccruedEnvironmentalLossContingenciesNoncurrentMember" abstract="true" name="AccruedEnvironmentalLossContingenciesNoncurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="oxy_SummaryOfSignificantAccountingPoliciesTable" abstract="true" name="SummaryOfSignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="oxy_OutsideOfNorthAmericaMember" abstract="true" name="OutsideOfNorthAmericaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="oxy_SeniorNotesDue20464400NoteOneMember" abstract="true" name="SeniorNotesDue20464400NoteOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="oxy_RiverStretchWhichRequireRemedialActions" abstract="false" name="RiverStretchWhichRequireRemedialActions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:lengthItemType"/>
  <xs:element id="oxy_ReconciliationOfRevenueFromCustomersAndOtherRevenueToTotalRevenueTableTextBlock" abstract="false" name="ReconciliationOfRevenueFromCustomersAndOtherRevenueToTotalRevenueTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="oxy_PercentageOfEnvironmentalReservesAccountedByAssociatedSites" abstract="false" name="PercentageOfEnvironmentalReservesAccountedByAssociatedSites" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="oxy_EnvironmentalRemediationSitesNumber" abstract="false" name="EnvironmentalRemediationSitesNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="oxy_SeniorNotes5550PercentDue2026Member" abstract="true" name="SeniorNotes5550PercentDue2026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="oxy_GulfOfMexicoMember" abstract="true" name="GulfOfMexicoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
