鄂尔多斯盆地西缘逆冲推覆构造带特征与油气成藏

The western edge of Ordos basin thrust nappe structure characteristics and hydrocarbon accumulation

鄂尔多斯盆地西缘构造运动复杂,构造类型多样,以青铜峡-马家滩地区的转换带为界,西缘形成了南北两个截然不同的逆冲体系。前者控制着古生代沉积体系及岩相古地理展布特征,而前陆盆地构造运动强烈影响了古生界地层的埋藏演化史。由于经历了多次构造运动,早期形成的断裂受到后期构造运动的影响而重新活动,从而使断裂活动具有继承性发育的特征,断裂活动对油藏的形成起了重要的控制作用。

The western edge of Ordos basin tectonic movements are complex,structure types,taking Qingtongxia-Majiatan area conversion zone as a boundary,the western edge of North and South was formed two distinct thrust system.The former control of Paleozoic depositional system and paleogeographic distribution characteristics,and the continental basin tectonic movement strongly influences the Paleozoic strata burial evolution history.Through many times of tectonic movement,the early formation of the fracture by the late tectonic movement and new activities,so that the fault activity has inherited developmental characteristics,fracture activity on the reservoir formation played an important role in controlling.