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