柴达木盆地北缘马海以东地区地层油气藏评价  

Strati-graphic hydrocarbon reservoirs evaluation in eastern Mahai area of the northern margin of Qaidam Basin

作　　者：杨明林[1] 尹太举[2] 张昌民[2] 易红霞[3] 

机构地区：[1]中国石化股份胜利油田分公司地质科学研究院,山东东营257015 [2]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023 [3]中国石化股份胜利油田分公司现河采油厂,山东东营257068

出　　处：《油气地质与采收率》2008年第1期41-43,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家自然科学基金项目“马海以东地区构造岩相及岩性油气藏目标评价”(40572078)

摘　　要：以马海构造东南斜坡为例,从油源、储盖组合、圈闭等方面对柴达木盆地北缘马海以东地区地层油气藏进行了评价。研究结果表明,虽然该区地层圈闭落实,顶、底板具有较好的封堵条件,储盖组合良好,但是由于尕丘凹陷烃源岩发育较差,厚度小且分布局限,制约了该区圈闭的有效性,因而难以成藏。综合评价认为,该区今后地层圈闭目标的重点应转向马海构造西缘和北缘油气运移通道上的有利油气捕获部位。Taking southeast slope of Mahai Structure as an example,strati-graphic hydrocarbon reservoirs in the eastern Mahai area of the northern margin of Qaidam Basin were evaluated from oil source,reservoir-seal combinations and traps etc.The results show that this area has good stratigraphic trap condition,preferable sealing condition at roof and footwall,and favorable reservoir-seal combinations.But the source rocks in Gaqiu Depression developed poorly with thin and limited distribution,which restrict the significance of the traps and result in much difficulty to form reservoirs.Based on comprehensive evaluation,the emphasis of the stratigraphic trap target should be the favorable oil-gas entrapment position on the way of hydrocarbon migrating passage in the western and northern Mahai structure.

关 键 词：地层油气藏 地层超覆圈闭 成藏条件 马海构造 柴达木盆地北缘 

分 类 号：TE112.322[石油与天然气工程—油气勘探]