Abstract: Numerical simulation for a condensate reservoir is a very complex problem. This paper gives an attempt to solve this kind of problems by an easier wayby means of the Black Oil Model.This paper gives the formulation of the problem, physical modeling mathematical modeling, the approach to get the solution and a derivation of the finite difference equations far differential Cases.There titre also actual examples presented at the end of the paper. The examples have shown the recovery of the condensate under differentiquantity of dry gas injected again. According to an analysis of the results, the paper has reached a conclusion that seventy percent dry gas recycling will be optimam for the Su₁ reservoir.