Investigation of the Effect of Alkaline -Surfactant- Polymer (ASP) on Oil Recovery in Heterogeneous Reservoirs

ASP flooding aims to remove oil trapped due to capillary forces and improve mobility ratios. In this study, the effects of reservoir heterogeneities (i.e. high permeable channels) on waterflooding, polymer, AS + polymer, polymer + AS + polymer flooding have been studied. In particular, the role of the front, resistance factor,  the rate of injected fluids per volume of injected fluid and concentrations of injected fluids have been investigated. The simulation results showed that the P+AS+P gives higher recovery (20%) compared to the water flooding. Also, it was observed that the optimum slug size of each system such as water or polymer slugs or AS in P+AS+P flood and polymer in P+W+P flood can be determined. For heterogeneous models with permeable channels, channel aspect ratio and the direction of channels are observed to be the effective factors for oil recovery.