鄂尔多斯盆地元东地区富县组低渗油藏剩余油分布主控因 素研究

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中图分类号：P624 文献标识码：A 文章编号：2097-5465（2025）05-0057-10

Abstract：TheYuandongFuxianFormationreservoirintheOrdosBasinrepresentsatypicallow-toultra-lowpermeabilityeservoir withstrongheterogeneityCurrentlyinthehigh-water-cutstageoflatedevelopment，itexhibitssignificantlyreducedrecovery eficiency，necesitatingurgentresearchonremainingoildistributionpattrs.Thisstudyintegratedcoreanalysis，thin-section identificationsaningelectronicrocoy（SE），ndpetrophsicaltesting.UsingPetrelsotware，eostructeductural， sedimentarymicrofacies，and property models for theprimary oil-bearing layer J1f2 member of the Fuxian Formation.tNavigatorbased numerical simulation achieved less than 10% errors in both volumetric matching and historical production curve matching， clarifyingremainingoildistributioncharacteristicsandcontrolingfactors.Researchresultsindicateemainingoildistributionis primarilycontroledbydualstructural-lithoogictrapping，manifestingasisolatedpotatoshapedblocksnearreservoirmagins；ig densityflowbariers/baflesinthewestersectioncreatelaterallyconfinederichmentzonesadjacenttothesediscontiuities； significantpermeabilitycontrastsformthiefzones，concentratingremainingoilinbandedpaternsalongbothflanksofhighpermeabilitystreaks；and injection-productionimbalance withinspecificellpaternsesultsinlocalizedremainingoilretentiondue toporsweepefciencyThesefindingsofercrucialinsightsforeficientdevelopmentoflow-permabilityreservorsandtargeted remaining oil recovery.

Keywords：：OrdosBasin；Fuxian Formation；low-permeabilityreservoir；remainingoildistribution；geologicalmodeling; numerical simulation

0 引言

近年来，常规油气储量急剧下降，低渗透油气藏日益受到重视[1-2]。（剩余8575字）