基于成因机制的鄂尔多斯盆地白266井区长2段低阻油层多参数流体识别方法

打开文本图片集

中图分类号：P618.13 文献标识码：A 文章编号：2097-5465（2026）01-0032-11

Abstract：IntheChang2Memberof BlockBai266intheHuaqingAreaofOrdosBasin，theextensivedevelopmentof lowresistivityoilzoneshasresultedinighdificultyndlowaccuracyinfluididentficationToaddressthisisue，asedoaalyical techniques includingscanning electronmicroscopy（SEM）andX-raydifraction（XRD），combied withdatafromwelltesting， coreanalysis，andformationwateranalysis，thistudyconductsanin-depthanalysisofthegeneticmechanismsoflowesistivityoil zonesandestablishesamuli-parametercomprehensiveidentificationmethodlogy.First，abasicclasificationofreservoirfluids wasperformedusinganacoustictimedierenceversusresistivitycross-plot.Next，anapparentresistivityinreaseratiohartwas appliedtoeliminateinterferencefromlithologyandsalinity.Then，aninvasionfactorwasusedtoquantifytheradialesistivity dierencebetweenoilandwaterlayersFinaly，thehydrocarbon-bearingpotentialofthereservoirasverifiedusingtheacoustic timedifrenceandresistivitycurveoverlaymethod.Welltestingvalidationshowsthatthismethodachievesafluididentification accuracy of 92.9% ，efectivelyaddressing thechallengeof identifying low-resistivityoil zones inthestudyarea.It providesa reliable echnicalreferenceforreservoirfluid identification inthisregionandotherareaswithsimilargeologicalconditions.

Keywords：low-resistivityoil zone；fluid identification；apparentresistivity increaserate；Huaqingarea；Ordos Basin

0 引言

随着油气勘探向纵深发展，非常规、隐蔽性强的低阻油层不断被发现，成为油气资源增储上产的重要潜力领域。（剩余12008字）