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1、第26卷第5期巖性油氣藏V01.26No.52014年10月LITHOLOGICRESERVOIRS0ct.2014文章編號(hào):1673—8926(2014)05—0051—06鄂爾多斯盆地北部成巖作用對(duì)儲(chǔ)集性的影響趙小會(huì),陳娟萍,漆亞玲,曹青2(1.中國(guó)石油長(zhǎng)慶油田分公司勘探開發(fā)研究院,西安710018;2.西安石油大學(xué)地球科學(xué)與工程學(xué)院,西安710065)摘要:通過大量常規(guī)薄片及鑄體薄片的分析鑒定。結(jié)合掃描電鏡、陰極發(fā)光和黏土礦物X射線衍射分析,對(duì)鄂爾多斯盆地北部盒8段儲(chǔ)層的成巖作用及影響進(jìn)行了研究。結(jié)果表明:受成巖物質(zhì)和成巖能量?jī)纱笠?/p>
2、素影響,盆地北部東區(qū)和西區(qū)孔隙類型有一定差異,西區(qū)以粒間溶孔和巖屑溶孔為主,東區(qū)則以巖屑溶孔和晶間孔為主;研究區(qū)儲(chǔ)集層可劃分為4種成巖相類型,其中硅質(zhì)膠結(jié)+鈣質(zhì)強(qiáng)溶蝕相是最有利的成巖相類型;成巖作用最終影響儲(chǔ)集性能,主要表現(xiàn)為膠結(jié)作用導(dǎo)致儲(chǔ)層致密,溶蝕作用改善儲(chǔ)層儲(chǔ)集性。深入研究?jī)?chǔ)層成巖作用可為優(yōu)選天然氣相對(duì)富集區(qū),促進(jìn)盆地北部氣藏的有效勘探開發(fā)提供理論依據(jù)。關(guān)鍵詞:成巖作用;成巖相;孔隙類型;盒8段;鄂爾多斯盆地中圖分類號(hào):P581文獻(xiàn)標(biāo)志碼: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引言圖,東至烏拉廟,面積約1.1X10km(圖1)。近年來,隨著勘探的不斷深入,盒8氣層段已成為鄂爾鄂爾多斯盆地北部
8、位于伊盟隆起和伊陜斜坡多斯盆地天然氣儲(chǔ)量增長(zhǎng)的主力層。分析氣田生產(chǎn)構(gòu)造帶交界處,北接杭錦旗,南抵烏審旗,西起毛蓋的動(dòng)態(tài)資料可知,儲(chǔ)集條件不同,氣田開發(fā)方案和收稿日期:2014—03—04:修回