Coalbed methane (CBM) well performance: A new methodology combining IPR and VLP analysis

Abstract Unlike conventional gas reservoirs where gas saturation exists at its maximum value initially, coalbed methane (CBM) reservoirs are unique in a way that gas saturation in reservoir starts from zero and builds up to reach a peak value as the adsorbed gas in the coal matrix desorbs into the coal cleat system due to depressurization of coal reservoirs through CBM wells. In comparison to conventional gas wells, the increase in gas saturation with pressure depletion is multifold in CBM reser