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ID:37328137
大小:1.27 MB
页数:6页
时间:2019-05-21
《准噶尔盆地玛湖凹陷高成熟油气成因与分布》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36卷第4期新疆石油地质Vol_36.No.42015年8月XINJIANGPETR0LEUMGE0LOGYAug.2015文章编号:1001—3873(2015)04—0379—06DOI:10.7657/XJPG20150401准噶尔盆地玛湖凹陷高成熟油气成因与分布阿布力米提,曹剑27陈静,杨海波1,陈冈0强17陶柯宇(1.中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000;2.南京大学地球科学与工程学院,南京210023)摘要:致密储集层中的油气是否高熟轻质,对于油气的富集与高产至关重要。对准噶尔盆地玛湖凹陷高熟轻质油气的基本特征、成因与分布规律的研究
2、结果表明,研究区高熟轻质油气具有原油密度较轻、成熟度较高、与天然气共生等特征,属于以下二叠统风城组优质烃源岩为主的多套烃源岩接近高成熟演化阶段的产物。在成藏过程中,高熟轻质油气藏的油气连续充注、保存好,未受降解破坏;高成熟油气的分布具有“源控”特征,垂向上因断裂沟通可以跨层运聚,分布区域广,是玛湖大油气区得以形成的重要条件。关键词:准噶尔盆地;玛湖凹陷;百口泉组;风城组;优质烃源岩;连续型油气藏;高成熟油气;轻质油中图分类号:TEl12.422文献标识码:AOriginandOccurrenceofHighlyMaturedOilandGasinMahuSag,Jungg
3、arBasinAbulimiti,CAOJian,CHENJing。,YANGHaibo,CHENGangqiang,TAOKeyu(1.ResearchInstituteofExplorationandDevelopment,XinjiangOilfieldCompany,PetroChina,Karamay,Xinjiang834000,China;2.SchoolofEarthSciencesandEngineering,NanjingUniversity,Nanjing,Jiangsu210023,China)Abstract:Whethertheoilandga
4、sarehighlymaturedandlightiscriticaltohydrocarbonenrichmentandhighyieldindensereservoirs.Thispaperinvestigatesthebasiccharacteristics,originandoccurrencerulesofhighlymaturedandlightoilandgasinMahusag,northwest—ernJunggarbasin.Resuhsshowthatthehighlymaturedandlightoilandgasinthestudyareaare
5、characterizedbylowdensity,highmatu-rityandcoexistencewithnaturalgas,whichbelongtotheproductsofmulti—setsourcerocksdominatedbytheLowerPermianFengchenghigh—qualitysourcerockundernearly—highmaturationstage.Duringthehydrocarbongeneration,migrationandaccumulation,thehighlymaturedandlightoiland
6、gasreservoirgotcontinuousoil·gaschargingandgoodpreservationwithoutorwithlittlebiodegradation;theoccur-renceofthemischaracterizedbysourcecontrolling,andtheycanmigrateandaccumulateincross—zoneandbroadareasverticallybyfaultsandfractures,whichmightbeimportantconditionsforformingMahugiantpetro
7、leumprovinceinJunggarbasin.KeyWords:Junggarbasin;Mahusag;Baikouquanformation;Fengchengformation;high-·qualitysourcerock;continuouslychargingreser·-voir;highlymaturedhydrocarbon;lightoil油气成藏与富集是油气流体与岩石固体格架相互面积的源外“连续型”油藏[11-121(图1)。分析资料表耦合作用的结果,因此,若油气密度较轻,甚至是以气明,这一带有相
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