Optimization of Water Injection Well Placement for Water Injection into an Oil Reservoir to Enhance Oil Recovery

Water injection is used in the petroleum industry as a means to retain the reservoir pressure and improve oil production. Water injects into the reservoir via one or more than one injection well. The location of injection well/wells in the oil field is very important. Selecting the location of such wells has always been a question among researchers. It must be allocated such that to be able to enhance oil recovery as much as possible. Using traditional methods to optimize such well locations is infeasible due to the complexity of reservoir equations. By depleting the underground reserves, oil companies are inclined to the preservative production of oil and gas. In this paper, a case study has been studied and finding an optimal well location is investigated in order to increase recovery factor. In this case study, a non-uniform (irregular size grids) sector of an oil reservoir with two-dimensional two-phase (oil and gas) flow regime has been considered. In this reservoir, there is a strong aquifer which maintains border pressures at a constant amount. In simulation part of this study, we use IMPES (Implicit Pressure, Explicit Saturation) method to solve equations and to obtain grid pressures and water saturation during time steps. We use MATLAB mathematical package for simulation and programming. Our main purpose in this study is to find the best location for a water injection well on this oil field to increase oil production as much as possible.