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- W2026155013 abstract "Abstract It has been reported that the ionic strength of injection water can have a major impact on the recovery of hydrocarbons during waterfloods, with increased recovery resulting from the use of low salinity brines. Understanding how the water and oil chemistry affects the final recovery from a physicochemical point of view is necessary in order to optimize low salinity water flooding process. It is clear from the literature over the last two decades that wettability is considered a key factor in achieving the low salinity effect. Optimum ionic strength and conditions for low salinity flood with respect to wettability is still uncertain. In this study, we integrate new coreflood apparatus using core samples, up to 20 inch length, to mimic and understand crude oil/water/rock interactions. The coreflood experiments are conducted under both secondary and tertiary recovery modes. We applied contact angle method to study rocks wettability. Reservoir rocks and stock-tank crude oil sample (west Texas) are utilized in all experiments. Synthetic brines varying in salinity (up to 174kppm) are tested under elevated temperature and pressure conditions. As ion exchange plays a crucial role in changing wettability, chemical analyses are performed on the effluent samples. Moreover, Zeta potential is determined for sandstone rocks and selected clays as a function of ionic strength. Residual oil saturation is determined with all variation in wettability, brine salinity, and temperature conditions. Some core flood tests give an incremental increase in produced oil as decreasing the injection brines ionic strength. Experimental results indicate that adjusting brine salinity may enhance oil recovery under certain conditions. This paper gives a new insight into optimum salinity and provides better understanding of interaction between injected brine, the oil, and the rock at downhole conditions." @default.
- W2026155013 created "2016-06-24" @default.
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- W2026155013 date "2010-04-24" @default.
- W2026155013 modified "2023-09-30" @default.
- W2026155013 title "A Comprehensive EOR Study Using Low Salinity Water in Sandstone Reservoirs" @default.
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- W2026155013 doi "https://doi.org/10.2118/129976-ms" @default.
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