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  <xs:element name="OtherSellingGeneralAndAdministrativeExpenseWithAircraftImpairment" id="useg_OtherSellingGeneralAndAdministrativeExpenseWithAircraftImpairment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
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  <xs:element name="ComponentsOfPropertyPlantAndEquipmentTableTextBlock" id="useg_ComponentsOfPropertyPlantAndEquipmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="TotalIncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" id="useg_TotalIncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
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  <xs:element name="PortionOfFutureOilAndGasProductionBeingHedgedPerDay" id="useg_PortionOfFutureOilAndGasProductionBeingHedgedPerDay" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="CurrentLiabilityMember" id="useg_CurrentLiabilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="CurrentAssetMember" id="useg_CurrentAssetMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
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  <xs:element name="CrudeOilCostlessCollarSettlementDateThreeMember" id="useg_CrudeOilCostlessCollarSettlementDateThreeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="CrudeOilCostlessCollarSettlementDateFiveMember" id="useg_CrudeOilCostlessCollarSettlementDateFiveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="CrudeOilCostlessCollarSettlementDateSevenMember" id="useg_CrudeOilCostlessCollarSettlementDateSevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="CrudeOilCostlessCollarSettlementDateSixMember" id="useg_CrudeOilCostlessCollarSettlementDateSixMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ScheduleOfUnrealizedAndRealizedDerivativeGainLossTableTextBlock" id="useg_ScheduleOfUnrealizedAndRealizedDerivativeGainLossTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="WorkingInterest" id="useg_WorkingInterest" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="WellsInProgress" id="useg_WellsInProgress" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" />
  <xs:element name="PeriodForCalculatingUnescalatedAveragePricesPriorToEndOfReportingPeriod" id="useg_PeriodForCalculatingUnescalatedAveragePricesPriorToEndOfReportingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PricePerBarrelForOilAtCeilingTest" id="useg_PricePerBarrelForOilAtCeilingTest" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="NumberOfCostCentersForQuarterlyCeilingTestForOilAndGas" id="useg_NumberOfCostCentersForQuarterlyCeilingTestForOilAndGas" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PercentageOfDiscountUsedForFutureNetRevenue" id="useg_PercentageOfDiscountUsedForFutureNetRevenue" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="CapitalizedCostsOfUnevaluatedPropertyIncludedInAmortizationBase" id="useg_CapitalizedCostsOfUnevaluatedPropertyIncludedInAmortizationBase" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" />
  <xs:element name="PricePerBarrelForNaturalGasAtCeilingTest" id="useg_PricePerBarrelForNaturalGasAtCeilingTest" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
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  <xs:element name="SouthTexasBasedOilAndGasCompanyMember" id="useg_SouthTexasBasedOilAndGasCompanyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="FarmorMember" id="useg_FarmorMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="InitialWellCommitment" id="useg_InitialWellCommitment" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PrimaryLeaseholdAcreageMember" id="useg_PrimaryLeaseholdAcreageMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="FarmInAcreageMember" id="useg_FarmInAcreageMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="DimmitWoodPropertiesLtdMember" id="useg_DimmitWoodPropertiesLtdMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="WilliamsAndMckenzieCountiesMember" id="useg_WilliamsAndMckenzieCountiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="MinimumPercentageOfNetRevenueInterestInLeasesOwned" id="useg_MinimumPercentageOfNetRevenueInterestInLeasesOwned" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PercentagePayoutOfAllCosts" id="useg_PercentagePayoutOfAllCosts" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PercentageOfWorkingInterestRetained" id="useg_PercentageOfWorkingInterestRetained" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="ExpectedNetRevenueInterestsInNewWellsAfterSale" id="useg_ExpectedNetRevenueInterestsInNewWellsAfterSale" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="NetProceedsOnTransaction" id="useg_NetProceedsOnTransaction" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="AdjustmentRelatedToRevenue" id="useg_AdjustmentRelatedToRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="NetSalesOfAcres" id="useg_NetSalesOfAcres" type="num:areaItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
</xs:schema>


