大牛地气田下石盒子组储层特征及影响因素

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中图分类号：P618.13 文献标志码：A 文章编号：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 区域地质概况

大牛地气田位于鄂尔多斯盆地东部，跨越内蒙古与陕西，以平缓褶皱为主，利于天然气聚集。（剩余2670字）