SIMULATION STUDY OF ENHANCING OIL RECOVERY IN SALINITY WATER CUT HETEROGENOUS BROWN FIELD

Mature oil fields often experience lower productivity due to high water cuts, reservoir heterogeneity, and harsh conditions related to pressure, temperature, and salinity. Traditional recovery methods, such as water flooding and standalone chemical flooding, typically do not work well in these situations. This study looks into the use of a hybrid chemical enhanced oil recovery (EOR) method, which involves radial injection of cross-linked polymer and surfactant solutions, in a synthetic heterogeneous brown field reservoir. A radial simulation model was created to assess recovery factor, pressure behavior, and water cut performance under extreme reservoir conditions. The results show that cross-linked polymers improved control over fluid flow, while surfactants lowered interfacial tension and helped mobilize remaining oil. The combined injection method was more effective than traditional techniques because it improved sweep efficiency, delayed water breakthrough, and increased oil recovery. This research shows that hybrid EOR is technically feasible in difficult environments and offers a way to extend the economic life of mature reservoirs.