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在分析淮南矿区煤层气地质背景的基础上,采用含量梯度法、压力—吸附法计算了研究区可采煤层的剩余煤层气资源量,探讨了影响该区煤层气可采潜力的煤储层压力、渗透能力、吸附/解吸特征、含气饱和度、可采系数等因素。结果表明,淮南矿区-1 500m以浅剩余煤层气资源量为2 419.70×108m3,可采资源量为1 102.20×108m3,可采资源丰度为1.98×108m3/km2,属于中等储量丰度的大型气田;区内煤储层为正常压力储层,煤储层渗透率、含气饱和度偏低,但本区可采煤层层数多,在渗透率总体偏低的背景下,区内存在的高渗区,具备煤层气地面开采的基础地质条件。
Based on the analysis of the geological background of CBM in Huainan mining area, the remaining CBM resources of the recoverable coal seams in the study area are calculated by content gradient method and pressure-adsorption method, and the coal reservoirs that affect the recoverable potential of CBM in this area are discussed Pressure, penetration ability, adsorption / desorption characteristics, gas saturation, recoverable factors and other factors. The results show that the shallow residual CBM resources of -1 500m in Huainan Mining Area are 2 419.70 × 108m3, recoverable resources are 1 102.20 × 108m3, and the recoverable resource abundance is 1.98 × 108m3 / km2, which belongs to a large gas field with medium reserves abundance ; The coal reservoir in the area is a normal pressure reservoir, the coal reservoir permeability and gas saturation are low, but the number of coal seam layers that can be taken in this area is large. Under the background that the permeability is generally low, the existing High permeability zone, with the basic geological conditions of coalbed methane ground mining.