石油与天然气地质 ›› 2008, Vol. 29 ›› Issue (3): 283-289,296.doi: 10.11743/ogg20080301

• 含油气盆地 •    下一篇

羌塘盆地褶皱变形特征、定型时间及其与油气的关系

李亚林1, 王成善1, 黄继钧2   

  1. 1. 中国地质大学, 地球科学与资源学院, 北京, 100083;
    2. 成都理工大学, 四川, 成都, 610059
  • 收稿日期:2008-01-25 出版日期:2008-06-24 发布日期:2012-01-16
  • 基金资助:

    国家自然科学基金项目(40672086);中国石油化工股份有限公司"青藏特提斯活动古地理与油气远景"项目(T060007ZS15);国土资源部全国油气资源战略选区调查项目(XQ2004-06).

Deformation characteristics and finalizing age of the folds in the Qiangtang Basin and their relations to oil and gas accumulation

Li Yalin1, Wang Chengshan1, Huang Jijun2   

  1. 1. School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China;
    2. Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2008-01-25 Online:2008-06-24 Published:2012-01-16

摘要:

羌塘盆地是青藏高原面积最大、勘探前景最好的盆地。盆地地表褶皱构造主要发育于侏罗系构造层中,呈带状展布,以东西向和北西西向直立水平褶皱为主,并构成类隔挡式组合样式。褶皱变形受挤压、走滑作用和基底构造多种构造机制制约,盆地南北缝合带造山作用控制了盆地褶皱形态、样式和空间分布规律,是褶皱变形的主要动力学因素。侏罗系构造层中大型背斜形成于侏罗纪末—早白垩世,与盆地主力烃源岩油气生成和运聚时空配置关系较好,为油气有利圈闭构造。

关键词: 油气聚集, 褶皱, 羌塘盆地, 青藏高原

Abstract:

Qiangtang basin is the largest and most prospective petroliferous basin in Qianghai-Tibet plateau.Its surface fold buildings mostly occur in zonal distribution within the Jurassic structural layer,and are dominated by EW-NWW trending upright horizontal folds in pseudo-ejective assemblages.The deformation mechanisms of folds were controlled by compression,strike-slip,and basal structures.Nevertheless,the orogeny along the NS-trending suture zone was the dominant dynamics factors that controlled the geometry,styles and spatial distribution of the folds in the basin.The large folds in the Jurassic structural layer were formed during the Late Jurassic-Early Cretaceous and their temporal and spatial relationships with the generation,migration and accumulation of hydrocarbons from the major source rocks were favorable for hydrocarbon pooling.Therefore,they are favorable trap structures.

Key words: oil and gas accumulation, fold, Qiangtang Basin, Qianghai-Tibet Plateau

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