Abstract: It is experimentally proved that gas condensate permeability is affected by interfacial tension, velocity, viscosity, thus the relationship between permeability and saturation can not be corrected by the function simply depending on IFT. A large number of methods have been proposed for including the capillary number in the gas condensate permeability functions. Two different methods are reviewed and analyzed, these methods evalu-
ated by using a least-squares fitting method to fit the correlations to one set of data measured at varying interfacial tension and flow velocity, the best function recommended and the direction of further study pointed out.

Key words: gas condensate, interfacial tension, relative permeability, function, least squares