A fully coupled thermo-hydro-mechanical model for heat and gas transfer in thermal stimulation enhanced coal seam gas recovery

The modeling results show that: thermal stimulation has promoting effects on gas recovery, however higher temperature does not mean higher efficiency of thermal stimulation to gas recovery; larger thermal sorption coefficient and lower fracturing coefficient correspond to higher gas production; thermal stimulation enhances gas recovery by promoting gas desorption. Our fully coupled THM model can improve current understandings of heat and mass transfer in thermal stimulation enhanced coal seam gas recovery.