Effect of reservoir fluid composition on gas recycling in gas condensate reservoirs

Abstract

This study is performed to evaluate the feasibility of gas recycling in gas condensate reservoirs having different compositions. In this study, a simple reservoir model was constructed and 10 sets of compositions from actual field data were selected as input for compositional reservoir simulator; ECLIPSE 300 to study the effect of fluid composition on the feasibility of gas cycling application. Economics analyses were performed in order to evaluate each simulated scenario. From the simulation results, it can be concluded that the higher the mole percentage of C5+ and C7+ and molecular weight of the compositions, the higher recovery of hydrocarbon liquid can be recovered. The gas cumulative production recovery by natural depletion and gas cycling methods are more or less the same. In term of economics, fluid compositions with greater mole percentage of C5+ and C7+ and molecular weights generally result in higher NPV and IRR and shorter payback period.