摘要
柴西南地区发育了丰富的断裂,这些断裂与岩性油气藏的形成和富集关系密切。研究这些断裂对岩性油气藏的控制作用,对指导该区进行岩性油气藏的勘探具有重要意义。对柴西南地区断裂特征、生烃凹陷和沉积相的研究表明,研究区岩性油气藏有环绕生烃凹陷分布的特点,三角洲前缘相和浊积扇沉积体系具有形成岩性圈闭的有利条件,而断裂控制了生烃凹陷的形成和分布、沉积相的发育和油气运移的特征。昆北断裂上盘可形成下切谷岩性圈闭,下盘形成构造-岩性圈闭;阿拉尔断裂和III号断裂控制了断层-岩性复合圈闭的发育;红柳泉断裂控制下形成上倾尖灭型岩性圈闭;七个泉断裂上盘发育了一个坡折带,形成岩性上倾尖灭圈闭、地层超覆圈闭及断裂-岩性复合圈闭;VII号断裂下盘发育坡折带,形成浊流扇岩性圈闭;且这些断裂均离生油凹陷距离很近,断裂活动时间与其排烃时间相匹配,为良好的运移通道,易于形成岩性油气藏。
Southwestern Qaidam Basin has experienced many tectonic movements and produced a lot of fracture. These faults are closely related to the formation and accumulation of lithologic reservoirs. It is important to study the controlling effect of these faults on lithologic reservoir, which is important to guide the exploration of lithologic reservoir. Research results show that, The fault of the southwestern Qaidam Basin mainly has two trends of North West and North and south, The North West trending fault is the main fault in the southwestern Qaidam Basin, which is divided into two different kinds, one of which is the synsedimentary fault, the other is the epigenetic fault. The relatively small size of the fracture in the north and south is mainly a series of transform fault. Distribution characteristics of Lithologic reservoirs are around the hydrocarbon generation sag, delta front and turbidite fan sedimentary system has the favorable conditions of forming lithologic trap, a large number of fracture is a good channel of oil and gas migration, and the fracture control the formation and distribution of hydrocarbon generation depression,development of sedimentary facies, and the characteristics of oil and gas migration. In addition, using the conclusion analyzed that the control of main fault to lithologic reservoir in the southwestern Qaidam Basin in detail.
出处
《科技通报》
北大核心
2016年第11期24-29,共6页
Bulletin of Science and Technology
基金
长江大学及青海油田公司联合项目(2011025)
关键词
柴西南地区
断裂特征
岩性油气藏
沉积相
运移通道
southwestern Qaidam Basin
fracture features
lithologic reservoir
sedimentary facies
migration pathway
作者简介
肖胜（1991-）,男,硕士生,主要从事地层学及沉积学研究.E-mail：1298780094@qq.com.
通讯作者：肖传桃（1965-）男,教授,博士,研究方向地层学及沉积学.E-mail：ctxiao@yangtzeu.edu.cn.
