黔西平桥区块薄互储层煤层气合层排采研究

Study on Combined Seam Gas in Thin Interbedded Reservoir in Pingqiao in Field Western Guizhou

为了查明平桥矿区薄互储层发育条件下,合层排采的可行性,依据多层叠置独立含煤层气系统理论,考虑煤层间距、储层特性等因素,将主要煤层划分为4个煤层气系统。结合平桥矿区测井、试井、等温吸附试验获取的原始物性资料,分析得出影响该区合层排采的2个主控因素。研究结果表明:第1煤层气系统和第2煤层气系统是合层排采的最佳组合。

In order to find out the feasibility combined seam gas drainage under the condition of thin interbed coal layers development in Pingqiao mining area,according to the theory of independent multiple superposed CBM system,considering the coal seam spacing and reservoir characteristics and so on, the main coal seam is divided into four coalbed methane systems. Combined with the original physical data obtained from well logging, well testing and isothermal adsorption experiment in Pingqiao mine area, the main control factors of the combined seam gas drainage in the region were analyzed including the following two aspects. The results show that first coal seam gas system and the coal bed gas system of the second is the best combination.