Because of technological complexity and financial requirements to initiate a gas flooding project, a thorough evaluation is necessary before it is performed. In this paper, a reservoir modeling approach was used to evaluate different flooding processes (miscible and immiscible) in a fractured oil reservoir. This study included: (1) equation of state (EOS) modeling of experimental PVT data, (2) determination of MMP for different gas compositions using a slim-tube model and study of the effect of grid number on the results (numerical dispersion), (3) study of the effect of completion pattern and injection rate on recovery performance, and (4) comparison of the recovery performance in different flooding scenarios.
