准噶尔盆地车排子地区三叠系成藏条件及主控因素分析

Reservoir-Forming Conditions and the Main Control Factors Analysis of Triassic System in Chepaizi Prominence,Junggar Basin

通过对准噶尔盆地车排子地区三叠系成藏条件分析,认为车排子地区三叠系具备形成规模油气藏有利条件。三叠系上下克拉玛依组储层规模大,喜山期形成的一系列张性正断裂均断至侏罗系,对三叠系无影响,白碱滩区域盖层下可能存在规模较大的三叠系次生油气藏。指出该区油气成藏存在两大主控因素:一是有利沉积相带控制储层分布;二是断裂控制油气纵向运移及聚集。认为红车断裂带下盘克拉玛依组是该区三叠系最有利勘探层系。

On the analysis of reservoir-forming conditions in the Triassic system in the region of Chepaizi in Junnggar Basin,the Triassic system layers are considered to have favorable conditions that can form sizeable oil-gas reservoirs.Kelamayi groups reservoirs in Triassic system have large scale.A series of tensional normal faults formed in Himalayan period all only reach to Jurassic system that have no effect on Triassic system,There would exist a large scale Triassic system secondary oil-gas reservoirs under Baijiantan group regional cap.There are two key controlling factors,and one of them is that favorable sedimentary facies zones controlling the distribution of the reservoirs, another one is faults controlling the vertical migration and accumulation of the oil-gas.The Ketamayi groups of the lower plate of Hong-Che fault zone should be most favorable exploration groups of Triassic system in this area.