煤层气的排采过程实际上就是通过不断排水降低煤储层压力,使原本吸附在煤层孔隙表面的甲烷气体释放出来的过程。煤层气产出的全过程都需要进行排水作业,能否经济、连续、稳定的排水,对煤层气排水提升设备的选用以及对排采最终产气效果都有极大的影响。因此,通过研究区域水文地质情况,地温梯度变化规律,以及排采产水氯离子浓度分布规律来分析排采产水补给源,对煤层气井排水提升设备的优化,排采制度的制定,以及未来产能预测都有极大的指导意义。 The process of CBM drainage is actually the process of releasing the methane gas originally adsorbed on the pore surface of the coal seam by reducing the pressure of the coal reservoir through continuous drainage. The whole process of CBM production needs to be drained. Whether economic, continuous and stable drainage can be achieved, the selection of CMM drainage and lifting equipment and the ultimate gas production effect of draining will be greatly affected. Therefore, by analyzing the regional hydrogeological conditions, the variation law of geothermal gradient and the distribution of chloride ion concentration in production and discharge, the supply sources of production, the optimization of drainage and upgrading equipment for coalbed methane well, the formulation of drainage system and the future Capacity forecasting has great guiding significance.