准噶尔盆地西北缘乌夏断裂带断裂活动与油气运聚  

Fault Activities and Hydrocarbon Accumulation in Wu-Xia Fault Belt in Northwestern Margin of Junggar Basin

作　　者：曲江秀[1] 邱贻博[1] 时振峰[2] 高卫红[3] 

机构地区：[1]中国石油大学地球资源与信息学院,山东东营257061 [2]中国石油长庆油田分公司勘探部,西安710021 [3]中国石油新疆油田分公司勘探公司,新疆克拉玛依834000

出　　处：《新疆石油地质》2007年第4期403-405,共3页Xinjiang Petroleum Geology

摘　　要：准噶尔盆地西北缘冲断带东段的乌夏断裂带是西北缘构造活动最为强烈的地区。由于多期的构造活动,断裂的平面和剖面形态呈现出复杂化和多样性。在垂向上,以侏罗系底界为界,将断裂划分为深层断裂体系和浅层断裂体系,由于深、浅层断裂体系活动时间和活动强度的差异,对油气成藏的控制作用也有明显的不同。从断裂的活动期与油气的运聚期配置关系来看,三叠纪至侏罗纪的断裂活动与烃源岩的主生排烃期相匹配,对油气的运聚产生了重要的影响。断裂与不整合构成"之"字型运移网络,使油气从凹陷中心向盆地边缘、从深层向浅层呈台阶式运聚成藏。Wu-Xia fault belt is located in the eastern part of thrust zone in northwestern margin of Junggar basin, which was tectonically the most active area here. The multistage tectonic activities allowed the lateral and vertical styles of the fault belt to be of complexity and diversity. It is vertically divided into the deep fault system and the shallow fault system bounded by the bottom of Jurassic. Because of differences in active period and intensity of the fault, the deep and shallow fault systems showed obvious differences in controlling the hydrocarbon accumulation. The Triassic-Jurassic fault active period matched well with the hydrocarbon generation and expulsion periods and had an important effect on hydrocarbon migration and accumulation. The active faults and the unconformities form the Z-like transportation networks, resulting in stepped hydrocarbon migration and accumulation from deep strata to shallow strata and from sag centers to basin margins in this region.

关 键 词：准噶尔盆地 乌尔禾-夏子街断裂带 断裂活动 油气运聚 断裂体系 运移网络 

分 类 号：TE112.421[石油与天然气工程—油气勘探]