Experimental and numerical studies of gas/oil multicontact miscible displacements in homogeneous and crossbedded porous media

We investigate oil recovery from multicontact miscible (MCM) gas injection into homogeneous and crossbedded porous media, using a combination of well-characterized laboratory experiments and detailed compositional flow simulation. All simulator input data, including most EOS parameters, were determined experimentally or from the literature. The produced fluids in all experiments were found not to be in compositional equilibrium. This was not predicted by the simulator, giving a poor match between experimental and simulated oil recoveries. The match was significantly improved for the crossbedded displacements by using alpha factors derived from the MCM displacements in the homogeneous pack.