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《鄂尔多斯盆地北部成岩作用对储集性的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第26卷第5期岩性油气藏V01.26No.52014年10月LITHOLOGICRESERVOIRS0ct.2014文章编号:1673—8926(2014)05—0051—06鄂尔多斯盆地北部成岩作用对储集性的影响赵小会,陈娟萍,漆亚玲,曹青2(1.中国石油长庆油田分公司勘探开发研究院,西安710018;2.西安石油大学地球科学与工程学院,西安710065)摘要:通过大量常规薄片及铸体薄片的分析鉴定。结合扫描电镜、阴极发光和黏土矿物X射线衍射分析,对鄂尔多斯盆地北部盒8段储层的成岩作用及影响进行了研究。结果表明:受成岩物质和成岩能量两大因
2、素影响,盆地北部东区和西区孔隙类型有一定差异,西区以粒间溶孔和岩屑溶孔为主,东区则以岩屑溶孔和晶间孔为主;研究区储集层可划分为4种成岩相类型,其中硅质胶结+钙质强溶蚀相是最有利的成岩相类型;成岩作用最终影响储集性能,主要表现为胶结作用导致储层致密,溶蚀作用改善储层储集性。深入研究储层成岩作用可为优选天然气相对富集区,促进盆地北部气藏的有效勘探开发提供理论依据。关键词:成岩作用;成岩相;孔隙类型;盒8段;鄂尔多斯盆地中图分类号:P581文献标志码:AInfluenceofdiagenesisonreservoirpropertiesinno
3、rthernOrdosBasinZHAOXiaohui,CHENJuanping,QIYaling,CAOQing(1.ResearchInstituteofExplorationandDevelopment,PetroChinaChangqingOilfieldCompany,Xi’an710018,China;2.SchoolofEachSciencesandEngineering,Xi’anShiyouUniversity,Xi’an710065,China)Abstract:Basedonanalysisofconventiona
4、lthinsection,castingthinsection,scanningelectronmicroscope,cathodelu-minescenceandX-ray,thispaperstudiedthereservoirdiagenesisanditsinfluenceonreservoirpropertiesofHe8memberinnorthernOrdosBasin.Theresultshowsthatbecauseoftheinfluenceofdiageneticmaterialandenergy,poretypes
5、inthewesternzonearedifferentfromtheporetypesintheeasternzoneofnorthernOrdosBasin.Therearemainlyintergranulardissolvedporesandlithicdissolvedporesinthewesternzone,whereaslithicdissolvedporesandintercrystallineporesintheeasternzone.Besides,diageneticfaciescanbedividedintofo
6、urtypes,amongwhichthecombinationofsiliceouscementphaseandcalciumdissolvedphaseisthefavorableone.Reservoirpropertiesareinfluencedbydiagenesis,whichdisplaysthatthecementationtightenreservoiranddissolutionimprovedreservoirproperties.Furtherresearchonreservoirdiagenesiscanpro
7、videtheoreticalfoundationfortheoptimizationofabundantgasaccumulationzoneandpromotionofgasreservoirexplorationandproductioninthenorthernOrdosBasin.Keywords:diagenesis;diagenesisfacies;poretypes;He8member;OrdosBasin0引言图,东至乌拉庙,面积约1.1X10km(图1)。近年来,随着勘探的不断深入,盒8气层段已成为鄂尔鄂尔多斯盆地北部
8、位于伊盟隆起和伊陕斜坡多斯盆地天然气储量增长的主力层。分析气田生产构造带交界处,北接杭锦旗,南抵乌审旗,西起毛盖的动态资料可知,储集条件不同,气田开发方案和收稿日期:2014—03—04:修回
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