准噶尔盆地乌夏地区侏罗系层序控制因素及油气成藏模式  

Sequence controlling factors and hydrocarbon accumulation patterns of Jurassic in Wuxia area of Junggar Basin

作　　者：陈世悦 王越 王剑 王玲 杨坤 

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266580 [2]新疆油田公司实验检测研究院,新疆克拉玛依834000 [3]中石化中原油田勘探开发研究院,河南郑州450004 [4]中石化西北油田分公司完井测试管理中心,新疆库尔勒841600

出　　处：《中国石油大学学报（自然科学版）》2015年第6期24-33,共10页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：'十二五'国家油气重大专项(2011ZX05013-002)

摘　　要：根据露头、岩心、钻测井及地震等资料,对准噶尔盆地乌夏地区侏罗系层序地层特征、沉积相类型及层序发育的控制因素等进行研究。结果表明:乌夏地区侏罗系可划分为1个二级层序(JSS1)、4个三级层序(JSQ1-JSQ4)、11个体系域,沉积相类型包括扇三角洲、曲流河、辫状河、曲流河三角洲、辫状河三角洲和湖泊等;构造运动、物源供给、湖平面升降是乌夏地区侏罗系层序发育的主要控制因素,但在不同位置作用强度有所差异,分别形成不同类型的油气藏;夏子街、红旗坝地区层序JSQ1低位域形成地层超覆油气藏,哈拉阿拉特山东侧以南的地区层序JSQ4低位域形成地层不整合遮挡圈闭油气藏,黄羊泉、乌尔禾地区层序JSQ1低位域形成地层不整合遮挡油气藏。Based on multiple data sets such as the outcrop, core, drilling, well logging and seismic data, the sequence stra-tigraphic characteristics, sedimentary facies types and controlling factors of the sequence development were studied. The re-sults show that the Jurassic in Wuxia area can be divided into one second-order sequence (JSS1), four third-order sequences (JSQ1-JSQ4), and eleven system tracts. The sedimentary facies include alluvial fan, meandering river, braided river, me-andering river delta, braided river delta and lake. Tectonic movement, sediments supply, and lake level fluctuation are the main controlling factors of the Jurassic sequence development in Wuxia area, which bear different intensity in different loca-tions, therefore different types of hydrocarbon reservoirs were formed. Stratigraphic overlap traps hydrocarbon reservoirs were formed in the lowstand system tract of sequence JSQ1 in Xiazijie and Hongqiba area;stratigraphic unconformity barrier traps hydrocarbon reservoirs were formed in the lowstand system tract of sequence JSQ4 in the south of east Hala'alate mountain;stratigraphic unconformity barrier traps hydrocarbon reservoirs were formed in the lowstand system tract of sequence JSQ1 in Huangyangquan and Wuerhe area.

关 键 词：准噶尔盆地 乌夏地区 侏罗系 层序地层 沉积相 控制因素 油气成藏模式 

分 类 号：P539.2[天文地球—古生物学与地层学]