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1、第32卷第9期地質(zhì)通報(bào)V01.32.NO.92013年9月GEoLoGICALBULLETINOFCHINASep.,2013鄂爾多斯盆地安塞油田長10優(yōu)質(zhì)儲(chǔ)層特征李克永,李文厚,張東陽3,嚴(yán)衛(wèi)宏,陳全紅,劉昊偉sLIKe—yong,LIWen—hou,ZHANGDong—yang3,YANWei—honga,CHENQuan—hong4,LIUHao—wei1.西安科技大學(xué)期刊中心,陜西西安710054;2.西北大學(xué)地質(zhì)學(xué)系,陜西西安710069:3.長慶油田公司勘探部,陜西西安710021;4.中國海洋石油總公司北京研究總院。北京1000275.中國石油勘探開發(fā)研究院.北京10008
2、31.PeriodicalCenter,Xi'anUniversityofScienceandTechnology,Xi'an710054,Shaanxi,China,.2.DepartmentofGeology,NorthwestUniversity,Xi'an710069,Shaanxi,China;3.ChangqingOilfieldBranchCompanyofCNPC,Xi'an710021,Shannxi,China;4.CNOOCBeijingGenerdResearchInstitute,BeqinglO002ZChina;5.ResearchInstituteofPe
3、troleumExplorationandDevelopment,Belling100083,China摘要:鄂爾多斯盆地安塞油田長10期發(fā)育以細(xì)砂巖和中砂巖為主的長石砂巖,膠結(jié)物主要有濁沸石、石英加大等硅質(zhì)膠結(jié)物、綠泥石和方解石;在早成巖早期酸性地層水大量溶蝕顆粒間膠結(jié)物,壓實(shí)作用強(qiáng)烈,在中成巖早期,湖相泥巖中生成的酸性介質(zhì)溶蝕砂巖顆粒間的膠結(jié)物及長石和巖屑顆粒碎屑,形成次生溶蝕孔隙,從而形成優(yōu)質(zhì)儲(chǔ)層??v向上,在不整合面和層序界面附近,儲(chǔ)層溶蝕作用強(qiáng)烈,次生孔隙發(fā)育,是優(yōu)質(zhì)儲(chǔ)層發(fā)育部位,向上溶蝕作用逐漸變?nèi)?;在平面上,越靠近湖盆中心溶蝕作用越強(qiáng).越遠(yuǎn)離湖盆中心溶蝕作用越弱。鄂爾多斯盆地
4、安塞油田長1O優(yōu)質(zhì)儲(chǔ)層主要發(fā)育在三角洲平原高能分流河道發(fā)育帶,溶蝕作用形成的濁沸石溶蝕孔隙、方解石溶蝕孔隙、長石溶蝕孔隙等次生孔隙成為優(yōu)質(zhì)儲(chǔ)層形成的有利相帶關(guān)鍵詞:優(yōu)質(zhì)儲(chǔ)層;成巖作用:沉積微相;延長組;安塞油田中圖分類號:TEl22.221文獻(xiàn)標(biāo)志碼:A文章編號:1671—2552(2013)09—1453—08LiKY,LiWH,ZhangDY,YanWH,ChenQH,LiuHW.AnanalysisoffavorablereservoircharacteristicsofChang10FormationintheAnsaioiifield,OrdosBasin.Geological
5、BulletinofChina,2013,32(9):1453—1460Abstract:ThecementsoffeldspathicsandstoneinChang10formationmainlyincludesuchtypesaslaumontite,quartzovergrowth,chloriteandcalcite.Compactionwasintenseinearlydiagenesisbecausetheformationwaterchangedintoacidicmediaandparticleslackedthesupportofcement.Secondarypo
6、reswereformedinMiddlediagenesisbecausetheacidicwaterderivedfromthemudstoneoflakefaciesdissolvedcements,feldspar,andlithicgrainsduringthemigrationprocessfromsourcerockstosandstones,thusformingthefavorablereservoir.Intheverticaldirection,thereservoirdissolutioninunconformityandsequenceboundarywasin
7、tense,andsec—ondaryporesweredeveloped.Upwards,thedissolutiongraduallybecameweaker,andhencesecondaryporeswerenotdeveloped.Intheplane,thedissolutionbecamegraduallyweakerfromthehydrocarboncentertotheshore.Thefavorablerese