摘要
羌塘盆地为一大型沉积盆地 ,基底为双层结构 ,基底构造具两坳夹一隆及断凸断凹特征。盆地盖层由中泥盆统—第三系组成 ,盖层中褶皱、断裂发育 ,具分带性 ,主变形期为燕山—喜马拉雅期。盆地经历长期演化 ,早期为拉张型盆地、晚期为挤压型盆地。盆地生油条件良好 ,具多种构造圈闭和良好盖层 ,构造圈闭形成时间与烃源岩排烃时间基本同步 ,具有良好的油气成藏条件。
The Qiangtang Basin was a huge sedimentary basin, the basement having a feature of double layer structure. The basemental structures were characterized by one uplift sandwiched in between two depressions, with a fault convex and a fault concave occurring. The sedimentary covers of the basin consisted of the Middle Ordovician Tertiary rocks in which the folding and faulting well developed and zoning distributed. The main deformation created in the Indosinian Yanshanian orogenies. The basin experienced a long termed evolutional history, with the early stage being tensile basin and the later period a compressive one. The oil forming condition was relatively good, because of multiple traps and good covering strata in the basin.The structural traps formed synchronously with the hydrocarbon expulsion of the source rocks.Based on what mentioned above, the target areas were presented in the paper.
出处
《地质科学》
CAS
CSCD
北大核心
2004年第1期1-10,共10页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家重点基础研究发展计划项目"青藏高原演化及其环境资源效应"(G1 9980 40 80 1 5 )资助
关键词
基底
盖层构造
成藏条件
油气田
羌塘盆地
The Qiangtang Basin, Basemental and cover structures, Accumulation conditions, Exploration targets
