1. Gas Condensate Rate Equation ”Pseudopressure Integral”
qg = gas flow rate, scf/d or m3/d
a = units conversion factor ( 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

2. 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

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