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

摘要： 印度板块与欧亚板块碰撞所引发的喜马拉雅构造运动是地质演化史上一次具有重大意义的地质事件,受青藏高原隆升产生的侧向水平挤压作用的影响,鄂尔多斯盆地宏观上表现出大面积隆升、侵蚀强烈、周边强烈下沉和地震活动十分活跃的特点,它的活动不仅影响盆地、山川、地貌的发生、发展,而且还影响着古老断裂的重新活动。对盆地新构造活动形成的断裂系统以及地形、地貌和地质构造等诸多现象的观察研究及对新构造活动与油气成藏的相关作用的研究表明,微裂隙分布的差异性和不均一性是造成鄂尔多斯盆地致密储层非均质性的主要原因之一。运用“地震泵”机理对盆地中的油气运移、聚集等问题进行了新的探讨

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