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为了探讨吐哈盆地沙尔湖凹陷侏罗系煤层气的勘探潜力,应用大量最新分析化验数据和钻井资料,分析了煤层发育特征、煤岩热演化规律和显微组分、煤储层物性、煤层气成因类型、煤岩吸附特征、含气性、构造运动、水动力条件、煤岩直接顶板的岩性等保存条件及前期煤层气井勘探失利原因等。结果表明,沙尔湖凹陷煤岩热演化程度低,具典型的煤层原生生物气特征,均质性差;但煤层厚度大,煤层裂隙及大孔发育,原煤含气量高,煤层气保存条件较好,煤层气总资源量较大。总之,沙尔湖凹陷侏罗系煤层气成藏条件优越,资源丰度高,采用合适的钻井、完井、储层改造措施及排采制度,将会取得一定的勘探成效。
In order to explore the exploration potential of Jurassic CBM in Shaerhu Sag, Turpan-Hami Basin, a large number of latest analytical laboratory data and drilling data were used to analyze the characteristics of coal seam development, thermal evolution of coal and rock, microstructure, physical properties of coal reservoirs, CBM genetic type, adsorption characteristics of coal and rock, gas-bearing, tectonic movement, hydrodynamic conditions, lithology and other preservation conditions of direct roof and roof of coal and coal and gas exploration wells in the previous failure reasons. The results show that the thermal evolution of coal and rock in the Shale Sag is low, with typical characteristics of primary biogas in the coal seams, and poor homogeneity. However, the thickness of the coal seam is large, the coal seam fissures and macropores are developed, the gas content of raw coal is high, and the CBM storage conditions are good The total amount of CBM resources is larger. In short, the Jurassic coalbed methane accumulation conditions in the Shaerhu Sag are superior and the resource abundance is high. Appropriate exploration, drilling, completion, reservoir modification measures and recovery measures will be achieved.