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时间:2020-06-01
《鄂尔多斯盆地华庆地区延长组长6储层成岩相及微观孔隙结构.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第26卷第4期现代地质Vo1_26NO.42012年8月GE0SCIENCEAug.2012鄂尔多斯盆地华庆地区延长组长6储层成岩相及微观孔隙结构师调调,孙卫,张创,梁晓伟,何生平,任大忠,李春霞(1.西北大学大陆动力学国家重点实验室,西北大学地质学系,陕西西安710069;2.陕西延长石油(集团)有限责任公司研究院,陕西西安710069;3.低渗透油气田勘探开发国家工程实验室,陕西西安710018;4.中国石油长庆油田分公司勘探开发研究院,陕西西安710018)摘要:鄂尔多斯盆地华庆地区延长组长6储层物性差、非均质性强。利用铸体薄片、扫描电镜、x衍射、物性、高压压汞等分析测试手段,深入分
2、析了超低渗储层成岩作用、成岩相及其微观孔隙结构特征。结果表明:发育的优势储集成岩相主要有水云母胶结一残余粒问孔+长石溶蚀相、长石溶蚀+水云母胶结一残余粒间孔相、长石溶蚀+绿泥石膜胶结一残余粒问孔相等。不同类型成岩相的微观孔隙结构特征不同,孔喉比和配位数与最大进汞饱和度和退汞效率有很好的对应关系,即孔喉比越小,配位数越大,则最大进汞饱和度和退汞效率越大,如水云母胶结一残余粒问孔+长石溶孔相;反之,孔喉比越大,配位数越小,最大进汞饱和度和退汞效率越小,如长石溶孔+绿泥石膜胶结一残余粒间TLN。关键词:华庆地区;延长组;长6储层;成岩相;微观孔隙结构;鄂尔多斯盆地中图分类号:TEl22.2文献标
3、志码:A文章编号:1000—8527(2012)04—0769—09DiageneticFaciesandMicro-poreStructureofChang6ReservoirinYanchangFormation,HuaqingArea,OrdosBasinSHITiao.tiao,SUNWei,ZHANGChuang,LIANGXiao—wei,HESheng—ping一,RENDa.zhong.LIChun.xia(1.StateKeyLaboratoryofContinentalDynamics,DepartmentofGeology,NorthwestUniversity,n,
4、Shaanxi710069,China:2.ResearchInstitute,Shaam~iYatwhangPetroleum(Group)Co.,Ltd.,Xi'an,Shaamxi710069,China;3.NationalEngineeringLaboratoryforExplorationandDevelopmentofLow—PermeabilityOil&GasFields.Xi'an,Shaanxi710018.China:4.ResearchIra~tituteofExplorationandDevelopment,ChangingOilfieldCompany,Pet
5、roChina,n,Shaanxi710018,China)Abstract:ThephysicalpropertyofChang6reservoirwaspoorwithstrongheterogeneityinYanchangForma—tion,Huaqingarea,OrdosBasin.Inthispaper,castingthinsections,SEM,X—raydiffraction,physicalprop—erties,highpressuremercuryinjectionandotheranalyticaltestingmethodswereusedtoanalyz
6、ethediagenesis,diagenetiefaciesandmicro—porestructureofthelowpermeabilityreservoirdeeply.Theresultsshowedthat:mainreserviordiagenetiefacieswerethehydromicacementation·-integranularporeandfeldspardissolutiondiage-neticfacies,feldspardissolutionandhydromicacementation—integranularporefacies,feldspar
7、dissolutionandchloritecementation—integranularporefacies.Thefeaturesofmicroscopicporestructuresofvarioustypesofdia—geneticphasesweredifferent.Andthepore—throatratioandcoordinationnumberwithmercuryinjectionsatura-
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