At least one well extends from the surface of the earth into the formation and a pressure gradient extends from the formation to the well to desorb {HEAD ~ methane} within the formation and flow the methane into {TAIL ~ the well} 
At least one well extends from the surface of the earth into the formation and a pressure gradient extends from the formation to the well to desorb { HEAD ~ methane } within the formation and flow the methane into { TAIL ~ the well }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL