بررسي عوامل مختلف مؤثربرتزريق آب كم شوردرفرآيند ازدياد برداشت نفت

Low Salinity Water Injection (LSWI) has emerged as a promising an‎d cost-effective enhanced oil recovery (EOR) technique due to its potential to improve oil recovery while maintaining environmental sustainability. The objective of this study was to eva‎luate the performance of low-salinity water injection an‎d compare it with conventional high-salinity water injection (HSWI) through numerical reservoir simulation. A three-dimensional reservoir model based on a five-spot pattern consisting of one injection well an‎d four production wells was developed using the CMG-IMEX simulator. Reservoir properties, fluid characteristics, initial conditions, an‎d operational constraints were kept identical in both scenarios to ensure that the observed differences in performance were primarily attributed to the salinity of the injected water. The simulation results demonstrated that low-salinity water injection outperformed highsalinity water injection in terms of reservoir pressure maintenance, sweep efficiency, an‎d water saturation distribution. The LSWI scenario exhibited higher oil production rates, delayed water breakthrough, an‎d a slower increase in water cut throughout the production period. Furthermore, cumulative oil production an‎d ultimate recovery factor were consistently higher under low-salinity injection conditions. The improved performance of LSWI can be attributed not only to enhanced pressure support but also to salinitydependent physicochemical mechanisms, including wettability alteration, ion exchange, an‎d reduction of residual oil saturation. The findings of this study indicate that low-salinity water injection is a technically feasible, economically attractive, an‎d environmentally friendly EOR technique. It has significant potential to improve oil recovery in reservoirs where conventional waterflooding suffers from poor sweep efficiency an‎d substantial residual oil trapping. Therefore, LSWI can be considered a viable alternative for enhancing hydrocarbon recovery an‎d extending the productive life of oil reservoirs.

حميدرضا شاه وردي

محسن محمدي , روح اله هاشمي