鄂尔多斯盆地陇东地区太原组L58井铝土岩元素录井在储层预测中的应用

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中图分类号：P618.130 文献标志码：A

Abstract：The aluminiferous rock seriesofwellL58 intheeasternLongdong areaof the Ordos Basin was taken as acase study toanalyze thecontentandvertical variations ofclayandaluminummineralsusing elementalloging data.Theseresultsare thencompared with mineralcompositionsandtheir vertical changes obtained throughgeochemical analysisandwhole-rock XRDanalysis，inorder tovalidatethefeasibilityof the proposed method.Furthermore，the mineralcontentiscorrelated with thechemical weathering index，natural gammarayvalues，porosity，andpermeabilitytoidentifykeycontrolingfactorsand diagnosticindicatorsforbauxitereservoirs.Theresultsdemonstratethatelementalloggngdatacanefectivelyidentifythe mineral composition and lithology of aluminiferous rock series.High diaspore content （ >75% ），a low chemical weathering index （ STI<15% ），and elevated natural gamma values （ GR>450 API）are indicative of high-quality reservoir zones，supporting the application of this method for the prediction of bauxite reservoir.

Keywords：bauxite reservoir； elemental logging；chemical weathering；Longdong area； Ordos Basin

鄂尔多斯盆地陇东地区太原组铝土岩的油气勘探取得了重大突破，2021年7月太原组铝土岩中L47井获得无阻流量 67.38×104m3/d[1] ，2023年5月首口太原组铝土岩水平井试气获无阻流量353.4×104m3/d 。（剩余14741字）