In a further embodiment of the invention, {TAIL ~ at least one common well} is used for both the recovery of methane from the coal bed formation and the introduction of hydrogen into {HEAD ~ the coal bed formation} 
In a further embodiment of the invention , { TAIL ~ at least one common well } is used for both the recovery of methane from the coal bed formation and the introduction of hydrogen into { HEAD ~ the coal bed formation }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD