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