Generally speaking, foams are used for gas mobility and water cut reduction. Injected gas such as CO2 and N2 is less viscous and dense that the in-situ crude oil and water. This led to gas channeling, overriding, and early breakthrough. However, foams were applied in this study to improve the mobility and sweep efficiency of the residual oil in the cores assisted by LS water. The surfactant used in foam stabilization prompted water-oil interfacial tension reduction. Reducing residual oil saturation prompted interfacial tension to decrease. LS water, on the other hand, triggered the sandstone wettability to be more water-wet, which increased oil recovery. As the salinity decreases, the oil recovery increases. This was determined by conducting water-flooding experiments on four cores.