Gas Condensate Rate Equation ”Pseudopressure Integral” qg = gas flow rate, scf/d or m3/d a = units conversion factor (0.001127 in field units) k = permeability, md h = net thickness, ft or m re = external radius of drainage area, ft or m rw = well radius, ft or m S = mechanical skin krg = gas relative permeability mg = gas viscosity, cp Bg = gas formation volume factor, RB/scf or m3/Sm3 kro = oil relative permeability mo = oil viscosity, cp Bo = oil formation volume factor, RB/STB or m3/Sm3 Rs = gas oil ratio, scf/STB or Sm3/Sm3 pR = average reservoir pressure, psia or bara pwf = wellbore flowing pressure, psia or bara Notes on equation

The term inside the pseudopressure integral is the gas mobility P > Dew point No condensate blockage P < Dew point Condensate blockage reduces mobility Dew point pressure of flowing fluid

The gas flow rate is proportional to the area under the mobility vs pressure curve Reservoir pressure Well BHP