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  <xsd:element name="NumberOfPurchasesOfPropertiesWithNonoperatedWells" id="rgec_NumberOfPurchasesOfPropertiesWithNonoperatedWells" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransactionDrillingCompensationReimbursedAmount" id="rgec_RelatedPartyTransactionDrillingCompensationReimbursedAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesPerMonthFromTransactionsWithRelatedParty" id="rgec_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesPerMonthFromTransactionsWithRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransactionTotalReimbursementsForDirectCosts" id="rgec_RelatedPartyTransactionTotalReimbursementsForDirectCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransactionOtherDocumentedOutOfPocketExpensesReimbursed" id="rgec_RelatedPartyTransactionOtherDocumentedOutOfPocketExpensesReimbursed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransactionNormalCollectionPeriodOnRevenuesProcessedByAffiliate" id="rgec_RelatedPartyTransactionNormalCollectionPeriodOnRevenuesProcessedByAffiliate" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AssetRetirementObligationsTable" id="rgec_AssetRetirementObligationsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OilAndGasPropertiesDomain" id="rgec_OilAndGasPropertiesDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SlaughterDeanField145WellsMember" id="rgec_SlaughterDeanField145WellsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NewPropertiesMember" id="rgec_NewPropertiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PropertySalesMember" id="rgec_PropertySalesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PropertyAbandonmentAndRestorationMember" id="rgec_PropertyAbandonmentAndRestorationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SlaughterDeanField7WellsMember" id="rgec_SlaughterDeanField7WellsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SlaughterDeanField3WellsMember" id="rgec_SlaughterDeanField3WellsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AssetRetirementObligationLineItems" id="rgec_AssetRetirementObligationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommencementOfPluggingOperationsNumberOfWells" id="rgec_CommencementOfPluggingOperationsNumberOfWells" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransactionProceedsFromSaleOfOilAndGasPropertyAndEquipment" id="rgec_RelatedPartyTransactionProceedsFromSaleOfOilAndGasPropertyAndEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CreditFacilityPeriodOfChangeAxis" id="rgec_CreditFacilityPeriodOfChangeAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CreditFacilityPeriodOfChangeDomain" id="rgec_CreditFacilityPeriodOfChangeDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="June2011ThroughJuly2011Member" id="rgec_June2011ThroughJuly2011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="August2011AndThereafterMember" id="rgec_August2011AndThereafterMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LineOfCreditFacilityFee" id="rgec_LineOfCreditFacilityFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="EstimatedDrillingCosts" id="rgec_EstimatedDrillingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransaction12PercentAnnualDiscountForEstimatedTimingOfCashFlows" id="rgec_RelatedPartyTransaction12PercentAnnualDiscountForEstimatedTimingOfCashFlows" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransactionAnnualDiscountRateOnFirstDrilledWell" id="rgec_RelatedPartyTransactionAnnualDiscountRateOnFirstDrilledWell" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PropertySalesIncludedInAccountsReceivableFromAffiliates" id="rgec_PropertySalesIncludedInAccountsReceivableFromAffiliates" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
</xsd:schema>
