<?xml version="1.0" encoding="utf-8"?>
<!--XBRL document created with Toppan Merrill Bridge  10.6.2.5 -->
<!--Based on XBRL 2.1-->
<!--Created on: 5/9/2024 2:02:35 PM-->
<!--Modified on: 5/9/2024 2:02:35 PM-->
<xsd:schema xmlns:us-gaap="http://fasb.org/us-gaap/2023" xmlns:sic="http://xbrl.sec.gov/sic/2023" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-types="http://fasb.org/us-types/2023" xmlns:stpr="http://xbrl.sec.gov/stpr/2023" xmlns:naics="http://xbrl.sec.gov/naics/2023" xmlns:country="http://xbrl.sec.gov/country/2023" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:srt="http://fasb.org/srt/2023" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:currency="http://xbrl.sec.gov/currency/2023" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:exch="http://xbrl.sec.gov/exch/2023" targetNamespace="http://www.unitedstates12monthoilfund.com/20240331" elementFormDefault="qualified" xmlns:srt-types="http://fasb.org/srt-types/2023" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:usl="http://www.unitedstates12monthoilfund.com/20240331" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2022-03-31" xmlns:us-roles="http://fasb.org/us-roles/2023" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:srt-roles="http://fasb.org/srt-roles/2023" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:attributeFormDefault="unqualified" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:ecd="http://xbrl.sec.gov/ecd/2023" xmlns:ecd-sub="http://xbrl.sec.gov/ecd-sub/2023">
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureStandardAndCustomAxisDomainDefaults" id="DisclosureStandardAndCustomAxisDomainDefaults">
        <link:definition>99900 - Disclosure - Standard And Custom Axis Domain Defaults</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/StatementCondensedStatementsOfFinancialCondition" id="StatementCondensedStatementsOfFinancialCondition">
        <link:definition>00100 - Statement - Condensed Statements of Financial Condition</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/StatementCondensedStatementsOfOperationsUnaudited" id="StatementCondensedStatementsOfOperationsUnaudited">
        <link:definition>00300 - Statement - Condensed Statements of Operations (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/StatementCondensedStatementsOfCashFlowsUnaudited" id="StatementCondensedStatementsOfCashFlowsUnaudited">
        <link:definition>00500 - Statement - Condensed Statements of Cash Flows (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/StatementCondensedStatementsOfCashFlowsUnauditedParenthetical" id="StatementCondensedStatementsOfCashFlowsUnauditedParenthetical">
        <link:definition>00505 - Statement - Condensed Statements of Cash Flows (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/StatementCondensedScheduleOfInvestmentsUnaudited" id="StatementCondensedScheduleOfInvestmentsUnaudited">
        <link:definition>00200 - Statement - Condensed Schedule of Investments (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/StatementCondensedScheduleOfInvestmentsUnauditedParenthetical" id="StatementCondensedScheduleOfInvestmentsUnauditedParenthetical">
        <link:definition>00205 - Statement - Condensed Schedule of Investments (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/StatementCondensedStatementsOfChangesInPartnersCapitalUnaudited" id="StatementCondensedStatementsOfChangesInPartnersCapitalUnaudited">
        <link:definition>00400 - Statement - Condensed Statements of Changes in Partners' Capital (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/StatementCondensedStatementsOfChangesInPartnersCapitalUnauditedParenthetical" id="StatementCondensedStatementsOfChangesInPartnersCapitalUnauditedParenthetical">
        <link:definition>00405 - Statement - Condensed Statements of Changes in Partners' Capital (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureOrganizationAndBusinessDetails" id="DisclosureOrganizationAndBusinessDetails">
        <link:definition>40101 - Disclosure - ORGANIZATION AND BUSINESS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesDetails">
        <link:definition>40201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFeesPaidByFundAndRelatedPartyTransactionsDetails" id="DisclosureFeesPaidByFundAndRelatedPartyTransactionsDetails">
        <link:definition>40301 - Disclosure - FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureContractsAndAgreementsBrokerageCommissionsDetails" id="DisclosureContractsAndAgreementsBrokerageCommissionsDetails">
        <link:definition>40401 - Disclosure - CONTRACTS AND AGREEMENTS - Brokerage Commissions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureContractsAndAgreementsAdditionalInformationDetails" id="DisclosureContractsAndAgreementsAdditionalInformationDetails">
        <link:definition>40402 - Disclosure - CONTRACTS AND AGREEMENTS - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesDetails" id="DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesDetails">
        <link:definition>40501 - Disclosure - FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFairValueOfFinancialInstrumentsValuationOfSecuritiesUsingFairValueHierarchyDetails" id="DisclosureFairValueOfFinancialInstrumentsValuationOfSecuritiesUsingFairValueHierarchyDetails">
        <link:definition>40701 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Valuation of Securities Using Fair Value Hierarchy (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFairValueOfFinancialInstrumentsFairValueOfDerivativeInstrumentsDetails" id="DisclosureFairValueOfFinancialInstrumentsFairValueOfDerivativeInstrumentsDetails">
        <link:definition>40702 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value of Derivative Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFairValueOfFinancialInstrumentsEffectOfDerivativeInstrumentsDetails" id="DisclosureFairValueOfFinancialInstrumentsEffectOfDerivativeInstrumentsDetails">
        <link:definition>40703 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Effect of Derivative Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DocumentDocumentAndEntityInformation" id="DocumentDocumentAndEntityInformation">
        <link:definition>00090 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/StatementCondensedStatementsOfFinancialConditionParenthetical" id="StatementCondensedStatementsOfFinancialConditionParenthetical">
        <link:definition>00105 - Statement - Condensed Statements of Financial Condition (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureOrganizationAndBusiness" id="DisclosureOrganizationAndBusiness">
        <link:definition>10101 - Disclosure - ORGANIZATION AND BUSINESS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureSummaryOfSignificantAccountingPolicies" id="DisclosureSummaryOfSignificantAccountingPolicies">
        <link:definition>10201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFeesPaidByFundAndRelatedPartyTransactions" id="DisclosureFeesPaidByFundAndRelatedPartyTransactions">
        <link:definition>10301 - Disclosure - FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureContractsAndAgreements" id="DisclosureContractsAndAgreements">
        <link:definition>10401 - Disclosure - CONTRACTS AND AGREEMENTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingencies" id="DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingencies">
        <link:definition>10501 - Disclosure - FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFinancialHighlights" id="DisclosureFinancialHighlights">
        <link:definition>10601 - Disclosure - FINANCIAL HIGHLIGHTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFairValueOfFinancialInstruments" id="DisclosureFairValueOfFinancialInstruments">
        <link:definition>10701 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureSubsequentEvents" id="DisclosureSubsequentEvents">
        <link:definition>10801 - Disclosure - SUBSEQUENT EVENTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" id="DisclosureSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>20202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureContractsAndAgreementsTables" id="DisclosureContractsAndAgreementsTables">
        <link:definition>30403 - Disclosure - CONTRACTS AND AGREEMENTS (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFinancialHighlightsTables" id="DisclosureFinancialHighlightsTables">
        <link:definition>30603 - Disclosure - FINANCIAL HIGHLIGHTS (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFairValueOfFinancialInstrumentsTables" id="DisclosureFairValueOfFinancialInstrumentsTables">
        <link:definition>30703 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/DisclosureFinancialHighlightsDetails" id="DisclosureFinancialHighlightsDetails">
        <link:definition>40601 - Disclosure - FINANCIAL HIGHLIGHTS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:type="simple" xlink:href="usl-20240331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="usl-20240331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="usl-20240331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="usl-20240331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:import namespace="http://xbrl.sec.gov/ecd/2023" schemaLocation="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2023" schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-roles-2023.xsd" />
  <xsd:import namespace="http://fasb.org/srt-types/2023" schemaLocation="https://xbrl.fasb.org/srt/2023/elts/srt-types-2023.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd" />
  <xsd:import namespace="http://fasb.org/srt/2023" schemaLocation="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2023" schemaLocation="https://xbrl.sec.gov/country/2023/country-2023.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/ecd-sub/2023" schemaLocation="https://xbrl.sec.gov/ecd/2023/ecd-sub-2023.xsd" />
  <xsd:element id="usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" name="UnrealizedGainLossOnOpenCommodityFuturesContracts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element name="LicenseFeesPayableCurrentAndNoncurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="usl_LicenseFeesPayableCurrentAndNoncurrent" substitutionGroup="xbrli:item" xbrli:balance="credit" />
  <xsd:element id="usl_NetAssetValuePerUnit" name="NetAssetValuePerUnit" nillable="true" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="MarketValuePerUnit" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="usl_MarketValuePerUnit" substitutionGroup="xbrli:item" />
  <xsd:element name="StatementScheduleOfInvestmentsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_StatementScheduleOfInvestmentsAbstract" substitutionGroup="xbrli:item" />
  <xsd:element name="OpenFuturesContractsLongMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_OpenFuturesContractsLongMember" substitutionGroup="xbrli:item" />
  <xsd:element name="PercentageOfPartnersCapital" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="usl_PercentageOfPartnersCapital" substitutionGroup="xbrli:item" />
  <xsd:element name="MorganStanleyInstitutionalLiquidityFundsGovernmentPortfolioMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_MorganStanleyInstitutionalLiquidityFundsGovernmentPortfolioMember" substitutionGroup="xbrli:item" />
  <xsd:element name="CollateralAmountOnOpenFuturesContracts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="usl_CollateralAmountOnOpenFuturesContracts" substitutionGroup="xbrli:item" xbrli:balance="debit" />
  <xsd:element name="GainLossOnCommodityFuturesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_GainLossOnCommodityFuturesAbstract" substitutionGroup="xbrli:item" />
  <xsd:element name="LicenseFeesAndOtherOfferingExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_LicenseFeesAndOtherOfferingExpenses" substitutionGroup="xbrli:item" xbrli:balance="debit" />
  <xsd:element name="IncreaseDecreaseManagementFeesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_IncreaseDecreaseManagementFeesPayable" substitutionGroup="xbrli:item" xbrli:balance="debit" />
  <xsd:element name="IncreaseDecreaseInProfessionalFeesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_IncreaseDecreaseInProfessionalFeesPayable" substitutionGroup="xbrli:item" xbrli:balance="debit" />
  <xsd:element name="IncreaseDecreaseInLicenseFeesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_IncreaseDecreaseInLicenseFeesPayable" substitutionGroup="xbrli:item" xbrli:balance="debit" />
  <xsd:element name="PaymentsToPartnershipRedemption" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_PaymentsToPartnershipRedemption" substitutionGroup="xbrli:item" xbrli:balance="credit" />
  <xsd:element name="EquityInTradingAccountsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_EquityInTradingAccountsAbstract" substitutionGroup="xbrli:item" />
  <xsd:element id="usl_CashAndCashEquivalentsInEquityInTradingAccounts" name="CashAndCashEquivalentsInEquityInTradingAccounts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element name="FeesPaidAndRelatedPartyTransactionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_FeesPaidAndRelatedPartyTransactionsAbstract" substitutionGroup="xbrli:item" />
  <xsd:element id="usl_FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock" name="FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="FinancialInstrumentsOffBalanceSheetRisksAndContingenciesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_FinancialInstrumentsOffBalanceSheetRisksAndContingenciesAbstract" substitutionGroup="xbrli:item" />
  <xsd:element name="FinancialHighlightsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_FinancialHighlightsAbstract" substitutionGroup="xbrli:item" />
  <xsd:element id="usl_BrokerageCommissionsTableTextBlock" name="BrokerageCommissionsTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" name="PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" substitutionGroup="xbrldt:hypercubeItem" />
  <xsd:element name="OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" substitutionGroup="xbrli:item" />
  <xsd:element name="NumberOfUnitsPerBasket" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="usl_NumberOfUnitsPerBasket" substitutionGroup="xbrli:item" />
  <xsd:element id="usl_FeePaidPerOrder" name="FeePaidPerOrder" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element name="UnitsIssuedDuringPeriodUnitsNewIssues" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_UnitsIssuedDuringPeriodUnitsNewIssues" substitutionGroup="xbrli:item" />
  <xsd:element name="UnitsIssuedDuringPeriodValueNewIssues" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_UnitsIssuedDuringPeriodValueNewIssues" substitutionGroup="xbrli:item" xbrli:balance="credit" />
  <xsd:element id="usl_NumberOfRegisteredUnits" name="NumberOfRegisteredUnits" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="SignificantAccountingPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_SignificantAccountingPoliciesTable" substitutionGroup="xbrldt:hypercubeItem" />
  <xsd:element name="SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_SignificantAccountingPoliciesLineItems" substitutionGroup="xbrli:item" />
  <xsd:element name="FundTrustsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_FundTrustsMember" substitutionGroup="xbrli:item" />
  <xsd:element name="GroupThreeMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_GroupThreeMember" substitutionGroup="xbrli:item" />
  <xsd:element name="FeesPaidAndRelatedPartyTransactionsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_FeesPaidAndRelatedPartyTransactionsLineItems" substitutionGroup="xbrli:item" />
  <xsd:element name="BaseFeePercentage" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_BaseFeePercentage" substitutionGroup="xbrli:item" />
  <xsd:element name="PercentageOfAverageDailyNetAssets" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="usl_PercentageOfAverageDailyNetAssets" substitutionGroup="xbrli:item" />
  <xsd:element name="BasisAmountForFeePercentage" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="usl_BasisAmountForFeePercentage" substitutionGroup="xbrli:item" xbrli:balance="credit" />
  <xsd:element name="CommissionsPaid" type="srt-types:perUnitItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_CommissionsPaid" substitutionGroup="xbrli:item" />
  <xsd:element name="MarketingAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_MarketingAgreementMember" substitutionGroup="xbrli:item" />
  <xsd:element name="GroupFourMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_GroupFourMember" substitutionGroup="xbrli:item" />
  <xsd:element name="GroupFiveMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_GroupFiveMember" substitutionGroup="xbrli:item" />
  <xsd:element name="CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" substitutionGroup="xbrldt:hypercubeItem" />
  <xsd:element name="CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" substitutionGroup="xbrli:item" />
  <xsd:element id="usl_RateOfReturnOnAverageAsset" name="RateOfReturnOnAverageAsset" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AverageNetAssetsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_AverageNetAssetsAbstract" substitutionGroup="xbrli:item" />
  <xsd:element name="PercentageOfTotalRevenue" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_PercentageOfTotalRevenue" substitutionGroup="xbrli:item" />
  <xsd:element name="ManagementIncentiveFeePercentage" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_ManagementIncentiveFeePercentage" substitutionGroup="xbrli:item" />
  <xsd:element id="usl_ExpensesExcludingManagementFeePercentage" name="ExpensesExcludingManagementFeePercentage" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfConsolidatedNetIncomeLoss" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_PercentageOfConsolidatedNetIncomeLoss" substitutionGroup="xbrli:item" />
  <xsd:element name="TotalExpensesPerUnit" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_TotalExpensesPerUnit" substitutionGroup="xbrli:item" />
  <xsd:element name="IncreaseDecreaseInNetAssetValuePerUnit" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_IncreaseDecreaseInNetAssetValuePerUnit" substitutionGroup="xbrli:item" />
  <xsd:element name="TotalIncomeLossPerUnit" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="usl_TotalIncomeLossPerUnit" substitutionGroup="xbrli:item" />
  <xsd:element name="ClosedPositionsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_ClosedPositionsMember" substitutionGroup="xbrli:item" />
  <xsd:element name="OpenPositionMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="usl_OpenPositionMember" substitutionGroup="xbrli:item" />
  <xsd:element id="usl_PercentageOfManagementFeeInAverageDailyTotalNetAssets" name="PercentageOfManagementFeeInAverageDailyTotalNetAssets" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="usl_TotalExpenses" name="TotalExpenses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="usl_CashAndCashEquivalentsInTradingAccounts" name="CashAndCashEquivalentsInTradingAccounts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="usl_CreationBasketsMember" name="CreationBasketsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseInEtfTransactionFeesReceivable" id="usl_IncreaseDecreaseInEtfTransactionFeesReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PrepaidLicenseFees" id="usl_PrepaidLicenseFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CashDepositsAndInvestmentsInTreasuries" id="usl_CashDepositsAndInvestmentsInTreasuries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="UnrealizedGainLossOnOpenCommodityFuturesContractsCurrentAndNoncurrent" id="usl_UnrealizedGainLossOnOpenCommodityFuturesContractsCurrentAndNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="FairValueAssetAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" id="usl_FairValueAssetAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OtherOperatingIncomeExpensePolicyTextBlock" id="usl_OtherOperatingIncomeExpensePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NetAssetValuePolicyTextBlock" id="usl_NetAssetValuePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfTotalNetAssets" id="usl_PercentageOfTotalNetAssets" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DirectorsFeesPayable" id="usl_DirectorsFeesPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ContractsAndAgreementsTable" id="usl_ContractsAndAgreementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContractsAndAgreementsLineItem" id="usl_ContractsAndAgreementsLineItem" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClFebruary2024ContractsExpiringJanuary2024Member" id="usl_NymexWtiCrudeOilFuturesClFebruary2024ContractsExpiringJanuary2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClMarch2024ContractsExpiringFebruary2024Member" id="usl_NymexWtiCrudeOilFuturesClMarch2024ContractsExpiringFebruary2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClApril2024ContractsExpiringMarch2024Member" id="usl_NymexWtiCrudeOilFuturesClApril2024ContractsExpiringMarch2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ComponentsOfCashAndCashEquivalentsAndEquityInTradingAccounts" id="usl_ComponentsOfCashAndCashEquivalentsAndEquityInTradingAccounts" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InvestmentSecondaryCategorization1Axis" id="usl_InvestmentSecondaryCategorization1Axis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InvestmentsBySecondaryCategorization1Domain" id="usl_InvestmentsBySecondaryCategorization1Domain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClMay2024ContractsExpiringApril2024Member" id="usl_NymexWtiCrudeOilFuturesClMay2024ContractsExpiringApril2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClJune2024ContractsExpiringMay2024Member" id="usl_NymexWtiCrudeOilFuturesClJune2024ContractsExpiringMay2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClJuly2024ContractsExpiringJune2024Member" id="usl_NymexWtiCrudeOilFuturesClJuly2024ContractsExpiringJune2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClAugust2024ContractsExpiringJuly2024Member" id="usl_NymexWtiCrudeOilFuturesClAugust2024ContractsExpiringJuly2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClSeptember2024ContractsExpiringAugust2024Member" id="usl_NymexWtiCrudeOilFuturesClSeptember2024ContractsExpiringAugust2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClOctober2024ContractsExpiringSeptember2024Member" id="usl_NymexWtiCrudeOilFuturesClOctober2024ContractsExpiringSeptember2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClNovember2024ContractsExpiringOctober2024Member" id="usl_NymexWtiCrudeOilFuturesClNovember2024ContractsExpiringOctober2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClJanuary2025ContractsExpiringDecember2024Member" id="usl_NymexWtiCrudeOilFuturesClJanuary2025ContractsExpiringDecember2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClDecember2024ContractsExpiringNovember2024Member" id="usl_NymexWtiCrudeOilFuturesClDecember2024ContractsExpiringNovember2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClFebruary2025ContractsExpiringJanuary2025Member" id="usl_NymexWtiCrudeOilFuturesClFebruary2025ContractsExpiringJanuary2025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClMarch2025ContractsExpiringFebruary2025Member" id="usl_NymexWtiCrudeOilFuturesClMarch2025ContractsExpiringFebruary2025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NymexWtiCrudeOilFuturesClApril2025ContractsExpiringMarch2025Member" id="usl_NymexWtiCrudeOilFuturesClApril2025ContractsExpiringMarch2025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
</xsd:schema>
