Journal of Engineering Research and Reports

In reservoir management to increase oil production in structure A of the "RK" Field with an area of ​​98.12ft2, a thickness of 76,124 ft, a porosity of 0.21%, and an initial water saturation of 0.25% which already matches the high watercut, it is necessary to plan water injection to increase the recovery factor. This is considered based on water availability, production performance results, and also from an economic perspective. The structure development study of "RK" Field A contains five active production wells and four suspended wells. Of the four suspended wells, one well was used as an injection well and three wells were reactivated to determine the effect of the waterflooding injection carried out using reservoir simulation methods by analyzing field petrophysical data such as oil saturation, permeability, and OPU maps. Based on the reservoir simulation, waterflooding injection was carried out in the AB_05 injection well with daily injection rates varying from 141 to 1200 BWIPD with injection pressures varying from 1782 to 2537 psi using one injection well. Based on the results of running simulations, the most optimal scenario is obtained with an injection rate of 750 BWIPD with an injection pressure of 2411 psi which produces a cumulative production of 4,687 MMSTB from 3.55 MMST, a recovery factor of 56,511% from 42.8% and a water cut of 60.9% from 43% so it is economical to carry out. water injection in structure A of the RK field.