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浅析套管井中剩余油饱和度测井技术与应用.docx

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浅析套管井中剩余油饱和度测井技术与应用 Title:ABriefAnalysisofCasedHoleSaturationMeasurementLoggingTechniquesandApplications Introduction: Intheoilandgasindustry,understandingtheremainingoilsaturationincasedholewellsiscrucialforefficientproductionandreservoirevaluation.Casedholesaturationmeasurementloggingtechniquesprovidevaluableinformationaboutthereservoir'sfluiddistributionandhelpsoptimizewellproductionandinterventionstrategies.Thispaperaimstoprovideacomprehensiveanalysisofcasedholesaturationmeasurementloggingtechniquesandtheirapplicationsintheindustry. 1.OverviewofCasedHoleSaturationMeasurementLogging: Casedholesaturationmeasurementloggingreferstothedeploymentofvarioustoolsinthewellbore,mainlythroughtheproductiontubing,toassessthefluidsaturationintheformationsurroundingthecompletedwell.Themeasurementtechniquescommonlyemployedincludepulsedneutroncapture(PNC),carbon-oxygen(C/O),andspectralgammaray(SGR)logging. 2.PulsedNeutronCaptureLogging: PulsedNeutronCaptureloggingreliesontheinteractionbetweentheneutronsourceandtheformation'shydrogennuclei.Thetechniquemeasuresthehydrogenindex,whichisproportionaltothefluidsaturation,byquantifyingthehydrogencapturereaction.PNCloggingcanprovidevaluableinformationaboutoil,gas,andwatersaturation,makingitavaluabletoolintheevaluationofwellproductivityandperformance. 3.Carbon-OxygenLogging: Carbon-Oxygenloggingassessesthesaturationbymeasuringtheratioofcarbonandoxygenintheformation'sfluids.Oilandgashavearelativelyhighercarbon-to-oxygenratiothanwater,allowingthedifferentiationbetweenthem.Theloggingtoolirradiatestheformationwithgammaraysandmeasurestheresultinggamma-rayspectratodeterminethefluidsaturation.Thistechniqueiswidelyusedincasedholewellsduetoitsabilitytodifferentiateoilandgasincomplexreservoirs. 4.SpectralGammaRayLogging: SpectralGammaRayloggingutilizestheenergyspectrumofnaturallyoccurringgammaraysemittedbytheformation'sradionuclides.Thespectraobtainedcanindicatethepresenceofdifferenttypesofformations,theirmineralogy,andthefluidstheycontain.Byanalyzi