石油与天然气地质 ›› 1985, Vol. 6 ›› Issue (2): 179-186.doi: 10.11743/ogg19850212

• 论文 • 上一篇    下一篇

中国西北地区逆掩断裂带与油气圈闭类型

谭试典   

  1. 石油工业部地球物理勘探局
  • 收稿日期:1984-08-30 出版日期:1985-06-25 发布日期:2012-01-16

OVERTHRUST BELTS IN NORTHWEST CHINA AND THEIR PETROLEUM TRAP TYPE

Tan Shidian   

  1. Geophysical Exploration Bureau, Ministry of Petroleum Industry
  • Received:1984-08-30 Online:1985-06-25 Published:2012-01-16

摘要:

随着板块构造理论的出现,特别是地壳测深技术的发展,逆掩推覆构造的研究已有了重大突破。这一突破对油气勘探有着重要的战略意义。七十年代以来,美国西部落基山大逆掩断裂带的油气勘探已取得丰硕的成果,目前已发现可采石油储量1.3亿吨,天然气储量2780亿立方米。

Abstract:

In conformity with their features,overthrust belts in northwest China can be divided into two basic types such as Karamay decollement-thrust type and Kuqa piedmont decollement-fold type.As for their origin,the former is a nappe structure formed mainly by gravity sliding,its root is a normal fault or a fault trough composed of high dip thrusts,the main body is relatively simple and the forefront is imbricated;the later is formed maily by lateral compression,the root of it is commonly not clear and usually occurs as a com-pressed belt,the main body is a complicated fold belt resulted from slide andoverthrust and is characterised by wide variation in formation thickness anddecollement.Due to the different iae of the above mentioned overthrust belts,a properpetroleum trap can only exist in a specialized belt.These overthrust belts thuscan be divided into ten kinds.It is considered that the overthrust belts have resulted in a new,special kind of source rock-reservoir-cap assemblage.Because of overthrusting,the pe-troleum exploration of Karamay oilfield in recent years has yielded gratifyingachievements.Besides,a large amount of petroleum will be exploited in someother thrust belts.