柴北缘西段侏罗系燕山期改造及石油地质意义

Yanshanian Reconstruction of the Jurassic in the Western of Northern Qaidam Basin and Its Petroleum Geological Significance

燕山期运动是柴北缘在侏罗纪以来第一次强烈的构造活动,也是现今柴北缘侏罗系残余分布的主要控制因素。柴北缘不同构造单元赋存侏罗系的后期改造特征有所区别,导致侏罗系各套地层被不同程度的剥蚀,直接影响了侏罗系的分布特征和烃源岩的赋存状况。该研究结果对于该地区油气资源评价具有可靠的参考价值,并有较为重要的石油地质意义。

The Yanshan movement is the first strong tectonic activity in Qaidam basin since the Jurassic, and it is also the main controlling factor for the residual distribution of the Jurassic in Northern Qaidam Basin. There are some differences among each tectonic region of Northern Qaidam Basin in characteristics of late reconstruction, resulting in the erosion of different strata of Jurassic strata and directly affecting the distribution characteristics of Jurassic and the occurrence of hydrocarbon source rocks. The results have a reliable reference value for the evaluation of oil and gas resources in this area, and have an important petroleum geological significance.