关键词: 鄂尔多斯盆地, 喜马拉雅运动, 构造运动, 地震, 地震泵机理, 微裂隙, 非均质性, 油气运移

Abstract: Himalayan tectonic movement,caused by crash of the Eurasian and Indian plates,is one of the great geological events in the geological evolution history of Ordos Basin.Under the compression of the side and level extrusion created by the uplift of Qingzang plateau,Ordos Basin shows some different features of large-scale uplift,strong erosion,deep sinking around the basin,and the extremely active seismic movements.These tectonic activities affected existence and the development of the basin,mountains and rivers,and the terrain features,and still the new movement of the aged fractures.The various landforms and geologic structures formed by the late tectonic movement were surveyed.The relation between the late tectonic movement and petroleum reservoir was discussed.The study result shows that the distribution difference and non-homogeneity of micro fissuring are the key reasons bringing about the tight reservoir heterogeneous.Applying the seismic pumping mechanism,some new understandings about the hydrocarbon migration and accumulation are presented.

Key words: Ordos Basin, Himalayan tectonic movement, tectonic movement, seismic pumping mechanism, micro fissuring, non-homogeneity, hydrocarbon migration