新构造运动对巴什托普油气田成藏与分布的控制

Control of Neotectonism on Hydrocarbon Accumulation and Distribution in Bashituopu Oilfield in Tarim Basin

新构造运动直接影响了塔里木盆地巴什托普地区中新世至今的油气晚期成藏与分布。针对巴什托普油田进行古构造恢复,结合4个构造活动幕次分析了油气成藏和分布规律,指出,不同构造活动幕期,圈闭面积、闭合高度、高点等随着构造活动的剧烈程度发生不同程度的改变;区内同一构造单元内不同圈闭发生此消彼长,圈闭发生改变并伴随油气的二次运移和重新分布;提出了以巴什托普油田为例的消长式汇合型成藏模式。通过古地貌恢复手段,结合构造运动幕次分析,研究油气圈闭形成及发育过程,这对于受幕式构造运动影响的油气聚集带的勘探和开发具有指导意义。

Tbe Neotectonic movement begun in the Miocene is divided into four episodes in Tarim basin, which have affected the petroleum accumnlation anti distribution in Bashituopu area since the Miocene. Based on the paleostructure restoration of this oilfield, integrated with the analysis of petroleum accumulation and distribution in the four episodes, it is suggested that in different episodes, the trap area, closure height and structural high will be changed in different degrees with the intensity of tectonic movements; in the same stnwtural unit, different traps are of different development or changes, and accompanied with secondary migration and redistribution of petroleum. These characteristics in Bashituopu oilfield can be summarized as convergenee and shift model for hydrocarbon accumulation, by which the formarion and development process of the petroleum traps in this area can be studied as a guide for exploration and development of oil-gas accumulation zones that affected by episodic tectonic movements.