关键词: 库车坳陷, 天然气运移, 物理模拟, 断裂, 圈闭, 输导模式, 运移效率

Abstract: The geographic models for the typical structures in Kuqa Depression were analyzed.On the basis of the mechanism of gas migration through fault and the similarity principles,an experimental model was established.The physical simulation results show that the fault below salt directly connected by hydrocarbon resource rocks and traps is the packing fault,in which gas migration velocity can get the top.The gas accumulation and formation of gas reservoir rely on the transmission models formed by fault combination.There are two efficient models for gas migration in Kuche Depression.One is the combined model formed by fault below salt and cutting salt,and another is the model formed by fault below salt only.The transmission model formed by fault below salt and breakage faults on the top of traps and the models formed by fault cutting salt only were not helpful for generating large-scale gas pools,and only some small gas fields were formed or there were gas shows.

Key words: Kuqa Depression, gas migration, physical simulation, fault, trap, transmission mode, migration efficiency