大牛地氣田下石盒子組儲層特征及影響因素

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中圖分類號：P618.13 文獻(xiàn)標(biāo)志碼：A 文章編號：2095-2945（2025）13-0093-04

Abstract：Thisstudycomprehensivelyanalyzesthepetrologicalcharacteristics，physicalproperties，andspatialdistributionof theLowerShiheziFormationtoexplorethecontrolingfactorsofreservoirproperties.Themineralcompositionisdominatedby lithicfragmentsandquartzaompaniedbyvariouscaymineralssuchasiltesmectitemixedlayers，chloriteandaolinite.he target formation exhibits an average porosity of 7 . 9 1 % andan averagepermeability of6.75 mD，with a positive correlation. Diageneticprocesesarecharacterizedbywidespreadandintensecompaction，alongwithcementationprimarilybysilicaand carbonate.ThediageneticevolutionhasprogressdthroughseveralstagesfromearlydiagenesisAtomiddlediagenesisB， currentlyatthemidlediagenesisBstage.Regardingdepositionalcontrols，box-shapedandsawtoth-boxshapedreservois demonstrate higher storage potential， whereas funnel-shaped reservoirs perform poorly.

KeyWords：DaniudiGasField;LowerShiheziFormation;reservoircharacteristics;diagenesis;sedimentarycontrolfactors

1 區(qū)域地質(zhì)概況

大牛地氣田位于鄂爾多斯盆地東部，跨越內(nèi)蒙古與陜西，以平緩褶皺為主，利于天然氣聚集。（剩余2670字）