吐哈盆地库木塔克凸起油气富集规律

Study on Oil and Gas Accumulation of Kumtak Uplift in Turpan-Hami Basin

由于库木塔克凸起的成藏条件、成藏规律和勘探方向都不清楚,制约了该区的勘探进程。通过近几年的研究认为,持续发育的古凸起控制了烃源岩的分布,同时也控制了有利储集相带的分布和油气运聚的方向。通过研究,认为前侏罗系成藏模式为砂岩侧向运移、剥蚀地层圈闭背景下发育的下生上储的构造+地层油藏;侏罗系成藏模式为不整合面侧向运移、超覆地层圈闭背景上发育的下生上储的构造+岩性油藏。指出了下步勘探的目标区为鲁克沁和英也尔构造带。

The unknown oil and gas reservoir formation conditions, oil and gas accumulation patterns, and exploration direction greatly restrict the exploration progress of Kumtak uplift. Based on the study in recent years, it is considered that the distribution of hydrocarbon source rocks and favorable facies belts, and the direction of oil and gas migration are determined by the ancient uplift that continuously develops. The research shows that the Pre-Jurassic reservoir is lower-generation and upper-storage structure and/or stratigraphic reservoir developed under the lateral migration of sandstones and the denudational stratigraphic traps. The Jurassic reservoir is lower-generation and upper-storage structure and/or lithologic reservoir developed over the lateral migration of unconformity surfaces and the overlapped stratigraphic traps. It is pointed out that Lukeqin and Yingyeer structural belts are the targets of exploration for oil and gas.