As source rocks and reservoirs of CBM, coal seams are different from conventional gas reservoirs.They have dual-porosity consisted of matrix pores and fractures and unique cleat systems.

• 摘要煤层作为煤层气的源岩和储集层，与常规天然气储层的不同在于煤储层是一种双孔隙岩层，由基质孔隙和裂隙组成，且有自身独特的割理系统。