Modeling relative permeability effects in gas-condensate reservoirs with anew trapping model

Many gas-condensate wells show a significant decrease in productivity once the pressure falls below the dew point pressure. A widely accepted cause of this decrease in productivity index is the decrease in the gas relative pe rmeability due to a buildup of condensate in the near wellbore region. Pred ictions of well inflow performance require accurate models for the gas rela tive permeability. Since these relative permeabilities depend on fluid comp osition and pressure as well as on condensate and water saturations, a mode l is essential for both interpretation of laboratory data and for predictiv e held simulations as illustrated in this article.