Blockage of coal seams by fracturing fluids (FFs) and swelling of coal matrix owing to FF adsorption are discussed and considered to be the basic factors for coalbed permeability damage.

• 讨论了伤害煤层渗透率的两大因素:压裂液堵塞煤层割理;煤基质吸附压裂液而膨胀。