蒙古弧形褶皱带上叠沉积盆地油气远景

Prospectivity for oil and gas in sedimentary basins superposed on arc-like folded belts in Mongolia

根据我们近年来在蒙古国开展的油气地质调查和勘探开发实践,对蒙古大地构造演化、盆地沉积充填、构造发育以及盆地含油气系统等开展综合研究。探讨了蒙古弧形褶皱带构造叠加变形特征,指出北西、北东向构造是蒙古西部和东部中新生代的叠加构造,南北向构造带是蒙古西部晚期发育的上叠构造;发育于蒙古弧形褶皱带的中生代沉积盆地群可分为残余海盆地、前陆盆地、裂陷盆地三种类型。根据石油地质条件综合分析,认为蒙古盆地群中塔木察格、东戈壁等盆地具有良好的油气勘探远景。

Following geological surveys and exploration for oil in Mongolia, in recent years, we have studied the tectonic evolution, depositional and petroleum systems in basins. The northwest- and northeast-trending structures in West and East Mongolia represent Mesozoic deformation overprinting arc-like folded belts. The N-S-rtrending structures developed late and overly other structures in West Mongolia. The Mesozoic basins of Mongolia can be classified into residual sea basins, foreland basins and rift basins. The Tamchage Basin and East Gobi Basin are considered favorable for oil and gas accumulation.