Quantifying the Low Salinity Waterflooding Effect

Low salinity waterflooding (LSW) has shown promising results in terms of increasing oil recovery at laboratory scale. In this work, we study the LSW effect, scale, and provide a basis for quantifying effect field scale by extracting reliable relative permeability curves. These were achieved experimental numerical interpretation core studies. Carbonate rock samples used to conduct secondary tertiary unsteady-state coreflooding experiments reservoir conditions. A mathematical model was developed as research tool interpret further validate physical plausibility experiments. At typical rate ~1 ft/day, low water (LS) resulted not only ~20% higher compared formation (FW) but also recovered sooner. LS showed capability reducing residual saturation when flooded mode. The greater caused can be attributed altering wettability less oil-wet confirmed numerically extracted