灰色关联分析与层次分析耦合模型在油气藏优势通道识别中的应用

——以鄂尔多斯盆地C区块为例

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中图分类号：P618.13；TE357 文献标识码：A 文章编号：2097-5465（2026）02-0039-09

Abstract：BasedontheYan8oilreservoir groupin Block Cof theOrdos Basin，this paperaddresses thechalenges inidentifying preferentialfowpathsinlow-permeabiltyreservoirsandthelimitationsofconventional methodsinmulti-parameteranalysis，a coupledmodel integrating GreyRelationalAnalysis （GRA）andtheAnalytic HierarchyProcess（AHP）isproposed.Basedonsix petrophysicalstaticparameters—porosity，permeability，effectivethickness，shalecontent，permeabilitycontrast，anditerlayr permeabilityrushcoeficient—andfiveproductiondynamicparameters—watercut，injection-productionratio，cumulativewater injection，cumulativeoilproduction，ndcumulativeliquidproduction—theGRAwasemployedtoquantifythecorelationbetwen each parameterandthedevelopmentdegreeof preferentialflowpaths.Subsequently，theAHPwasapliedtotransformthe relationaldegreerankingsintoanobjectivejudgmentmatrix，establishingahierarchical weightingsystemcomprisingcriterionand indicatorlayersFinall，acomprehensivescorewascalculatedbymultiplyingtherelationaldegreeofeachparameterbyitsAHPassignedweight.Thisscoreservedasthequantitativeevaluationcriterionforclasifyingpreferentialfowpaths：ClassI（ighly developed）for A>0.26 ，ClassII（moderatelydeveloped）for 0.2⩽A⩽0.26 ，and Class II（weaklydeveloped） for A<0，2The model was applied to five sample wells for calculation and validation.Results show an 89% coincidence rate between the model'sidentificationsandtracertestoutcomes.Furthemore，welsinhighlydevelopedareasexhibitedsignificantlyhigherwater cutandproductiondeclineratesthanthoseinweaklydevelopedareas，verifyingthemodel'sefectivenessThisapproachprovides reliabletechnicalsupportforteaccurateidentifcationofpreferentialfowpathsandtheoptizationofdevelopmentstrategiessuch as profile control.

Keywords：preferentialflowpath；greyrelationalanalysis（GRA）；analytic hierarchyprocess（AHP）；Yan8oilreservoir group

0 引言

随着能源需求的不断增长，油气资源的开发向着复杂储层延伸。（剩余8592字）