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  <xsd:element name="AdValoremtaxesPayableNonCurrent" id="epsn_AdValoremtaxesPayableNonCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="TransactionCosts" id="epsn_TransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NumberOfGrossWellsHeld" id="epsn_NumberOfGrossWellsHeld" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="NumberOfNetWellsHeld" id="epsn_NumberOfNetWellsHeld" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="PercentageOfHedgingAnticipatedProductionFromPdpReservesUponDropInFacilityUtilizationBelowThreshold" id="epsn_PercentageOfHedgingAnticipatedProductionFromPdpReservesUponDropInFacilityUtilizationBelowThreshold" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="HedgingTermUponDropInFacilityUtilizationBelowThreshold" id="epsn_HedgingTermUponDropInFacilityUtilizationBelowThreshold" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NormalCourseIssuerBidRepurchaseProgramFebruary182026ToFebruary182027Member" id="epsn_NormalCourseIssuerBidRepurchaseProgramFebruary182026ToFebruary182027Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ArmEnergyMember" id="epsn_ArmEnergyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AresEnergyMember" id="epsn_AresEnergyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WilliamsMember" id="epsn_WilliamsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="O2026Q1DividendsMember" id="epsn_O2026Q1DividendsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NYMEXHenryHubLDOptionsCallMember" id="epsn_NYMEXHenryHubLDOptionsCallMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NYMEXHenryHubLDOptionsPutMember" id="epsn_NYMEXHenryHubLDOptionsPutMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NYMEXHenryHubLDSwapsMember" id="epsn_NYMEXHenryHubLDSwapsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NYMEXWTICMaOptionsPutMember" id="epsn_NYMEXWTICMaOptionsPutMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NYMEXWTICMaSwapsMember" id="epsn_NYMEXWTICMaSwapsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NYMEXWTICMaOptionsCallMember" id="epsn_NYMEXWTICMaOptionsCallMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NumberOfWellsDrilledDeemedNonCommercial" id="epsn_NumberOfWellsDrilledDeemedNonCommercial" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OtherReceivablesMember" id="epsn_OtherReceivablesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="HFSinclairMember" id="epsn_HFSinclairMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SusquehannaCountyMember" id="epsn_SusquehannaCountyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NYMEXHHSwapsMember" id="epsn_NYMEXHHSwapsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NYMEXHHOptionsMember" id="epsn_NYMEXHHOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NYMEXWTICMaOptionsMember" id="epsn_NYMEXWTICMaOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
</xsd:schema>
