Coalbed methane is an unconventional natural gas.Based on the geology model of desorption-diffusion-Darcy flow, coalbed methane reservoir simulation has its own characters.

• 煤层气属于非常规天然气，其储层数值模拟基于解吸-扩散-渗流的地质模型，在具体模拟过程中具有自身的特点。