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低孔低渗储层有效厚度确定方法研究——以安塞油田长2储层为例.docx

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低孔低渗储层有效厚度确定方法研究——以安塞油田长2储层为例 Title:ResearchonDeterminationMethodofEffectiveThicknessofLowPorosityandLowPermeabilityReservoir-ACaseStudyofChang2ReservoirinAnsaiOilfield Abstract: Theeffectivethicknessofareservoiriscrucialintheassessmentofitsexploitationpotentialandoveralloilrecovery.ThisresearchfocusesonthedeterminationmethodoftheeffectivethicknessoftheChang2reservoirintheAnsaiOilfield,whichischaracterizedbylowporosityandlowpermeability.Variousgeologicalandgeophysicaldatawereanalyzedtodevelopacomprehensiveapproachtoaccuratelydeterminetheeffectivethickness.Thestudycontributestoabetterunderstandingofthereservoir'spotentialandaidsinoptimizingdevelopmentstrategiesforenhancedoilrecovery. Keywords:lowporosity,lowpermeabilityreservoir,effectivethickness,determinationmethod,AnsaiOilfield,Chang2reservoir. 1.Introduction: Thedeterminationofeffectivethicknessplaysavitalroleinevaluatingtheexploitationpotentialanddevelopmentplanningoflowporosityandlowpermeabilityreservoirs.AsoneofthemajorreservoirsintheAnsaiOilfield,theChang2reservoirposesuniquechallengesduetoitscomplexgeologicalcharacteristics.InvestigatingtheeffectivethicknessoftheChang2reservoirisofgreatsignificanceforoilfielddevelopmentandproductionoptimization. 2.GeologicalCharacteristicsoftheChang2Reservoir: TheChang2reservoirintheAnsaiOilfieldischaracterizedbylowporosity,lowpermeability,andheterogeneousdistribution.Thelithologymainlyconsistsofshale,sandstone,andsiltstone,withvaryingdegreesoffracturing.Thepresenceoffaultsandfracturessignificantlyaffectstheconnectivityandcontinuityofthereservoir,makingthedeterminationofeffectivethicknessmorechallenging. 3.DataAcquisitionandAnalysis: TodeterminetheeffectivethicknessoftheChang2reservoir,variousgeologicalandgeophysicaldatawerecollectedandanalyzed.Coredata,wellloggingdata,seismicdata,andproductiondatawereintegratedandinterpretedtogainacomprehensiveunderstandingofthereservoir'scharacteristics. 4.DeterminationMethod: 4.1IntegrationofCoreDataandWellLoggingData: Coreanalysisprovide