A Screening Analysis of Conventional Reservoirs for Nitrogen and Dry Gas Injection by Using a Combination of Experimental Design Techniques and Compositional Reservoir Simulation

One of the common methods for reservoir screeining in EOR projects is comparison of prosperous projects is comparison between successfulcarried out projects and available reservoirs in the whole world. Because of lack of similar samples in this method, some of reservoirs are not considered for injection, so casing of another EOR method is necessary. In this paper, at first, by combination of Experimental design and Compositional simulation, rock and fluid effective parameters are detected in N2 and CH4 gas injections for pressure maintenance in reservoirs. Then, indirect and interaction effect of these parameters are analyzed and compared for both gas injections. separately for both gases injection are analyzed and compared. Finally, for estimation of oil recovery factor, empirical correlation is proposed. This correlation is used for primary screening in N2 and CH4 injection projects.