柴达木盆地西部地区隐蔽油气藏形成与分布  

Formation and distribution of the Subtle Pools in the western Qaidam Basin

作　　者：李鹤永[1] 刘震[2] 陈艳鹏[2] 党玉琪[3] 杨雪峰[3] 

机构地区：[1]中国石化江苏油田分公司,江苏扬州225009 [2]中国石油大学(北京)石油天然气成藏机理教育部重点实验室,北京102249 [3]中国石油天然气股份有限公司青海油田分公司,甘肃敦煌736202

出　　处：《西安石油大学学报（自然科学版）》2007年第5期21-24,64,共5页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：中国石油天然气股份有限公司"十五"重点科技攻关项目(编号:2003-K08)资助

摘　　要：柴达木盆地西部地区沉积以近物源、多物源的冲积扇—河流—三角洲—湖泊沉积体系为特征,岩性横向变化大,各种砂体岩性圈闭十分发育;构造活动强烈且具多期性,形成多种地层、裂缝、复合型隐蔽圈闭以及隐伏的构造圈闭.充足的油源为该区隐蔽油气藏的形成提供了丰厚的物质基础;晚期生烃保证了后期形成的裂缝型隐蔽圈闭也可成藏.分析柴西地区隐蔽油气藏的形成条件,认为柴西地区隐蔽油气藏类型多,分布广,蕴藏储量大,具有相当大的勘探潜力.Sedimentary system in the western Qaidam Basin is characterized as alluvial fan-fluvial--dalta system.The lateral variation of lithology is great,and the lithologic traps of various sandbodies are very developed.And there are multi-stage strong tectonic movements,which form many types of subtle pools,such as lithologic hydrocarbon reservoir,stratigraphic hydrocarbon reservoir,fractured hydrocarbon reservoir,composite pool and buried structural trap.Plenty of oil source provides material foundation for the formation of the subtle pools.Moreover late hydrocarbon generation makes it possible that the fractured traps formed late catches the hydrocarbon.According to the analyses of geological elements of forming the subtle pools and the types and the distribution of the subtle pools in the western Qaidam Basin,it is held that there are plenty of subtle pools in the studied area,and they distribute widely.Therefore,the exploration potential in the area is very great.

关 键 词：柴达木盆地西部 隐蔽油气藏 岩性油气藏 地层油气藏 裂缝型油气藏 

分 类 号：TE122.31[石油与天然气工程—油气勘探]