Primary discussion on Himalayan tectonic movement and petroleum reservoir in Ordos Basin

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.