学术
乌夏断裂带侏罗系油气成藏主控因素
吴孔友[1] 洪梅[1] 聂振荣[2] 张礼冈[2] 郑志祥[3]
[1]中国石油大学地球资源与信息学院,山东东营257061 [2]中国石油新疆油田分公司,新疆克拉玛依834000 [3]中国石化西北分公司,乌鲁木齐830011
摘 要:
乌尔禾-夏子街断裂带是一个晚石炭世至三叠纪发育起来的大型逆掩断裂带,断层主要发育在三叠系以下层位,侏罗系以上近于单斜形态。目前已在二叠系、三叠系和侏罗系发现油气藏,其中侏罗系含油层位主要集中在八道湾组,油藏类型以地层和岩性油气藏为主,原油遭受次生改造作用较强。通过对该区侏罗系典型油气藏的解剖证实,油气是沿断裂运移至侏罗系底部不整合后发生侧向运移,上倾方向遇稠油遮挡在底砾岩或水进砂体中成藏。这一认识已得到勘探实践证明。[著者文摘]
文章出处:
《新疆石油地质》-2007年28卷4期 -434-436页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1001-3873（2007）04-0434-03
The Key Factor of Jurassic Hydrocarbon Accumulation in Wu-Xia Fault Belt, Junggar Basin
WU Kong-you, HONG Mei, NIE Zhen-rong, ZHANG Li-gang, ZHENG Zhi-xiang （1. Faculty of Geo-Resources and Information, China University of Petroleum, Dongying, Shandong 257061, China; 2.Research Institute of Explorationand Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China; 3.Northwest Company, Sinopee, Urumqi, Xinjiang 830011, China）
Abstract:
Wu-Xia fault belt is a large-scale overthrust belt developed from Late Carboniferous to Triassic and faults mostly develop below the Triassic. The structure overlying the Jurassic occurs mainly in monocline. Oil-gas reservoirs have been found in the Permian, the Triassic and the Jurassic, of which the oil-bearing horizons of Jurassic are mainly found in its Badaowan formation, dominated by stratigraphic and lithologic oil-gas reservoirs, with strong secondary reconstruction of crude oil. The dissection of the Jurassic typical reservoirs in this area indicates that the oil and gas migrated along the faults to the basal unconformity of Jurassic followed by starting lateral migration, and accumulation in the basal conglomerate or the transgressed sand bodies due to meeting barrier beds of updip heavy oils. Such an idea has been examined from exploration and practices.[著者文摘]
Key words:
Junggar basin; Wuerhe-Xiazijie fault belt; unconformity; heavy oil; control factor;, hydrocarbon accumulation
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