Low salinity water injection (LSWI) has gained popularity recently as a potential oil recovery method. The efficiency of LSWI is observed to be increased when surfactant/polymer/nanoparticles are used as an additive. Surfactants help reduce the interfacial (IFT) tension of the oil-water systems, while nanoparticles help alter the wettability of the rock surface. IFT studies are conducted with surfactants and without surfactants to understand the effect of the surfactant on IFT and wettability. Similarly, wettability studies are conducted with a semi-automatic goniometer to understand the effect of surfactants and nanoparticles on wettability. Finally, oil recovery studies with various equipment (Amott cell, sandstone core, microfluidic) is carried out to understand the efficiency of the novel injection fluid formulated using low salinity seawater, anionic surfactant AOT (AOT stand for dioctyl sodium sulfosuccinate), polymer polyvinylpyrrolidone (PVP-K30) and silica nanoparticles. X-ray diffraction (XRD) analysis of sea salt is carried out to realize the salt composition and the sandstone core. FTIR analysis of crude oil is carried out to know the presence of different components. Energy dispersive X-ray (EDXA) and scanning electron microscopy (SEM) analyses are done to understand the surface alteration due to nanoparticles. It has been observed that novel nanofluids in low salinity seawater with surfactant and nanofluid have the potential to recover an additional 6-12 % of oil originally in place at surfactant concentration 150 ppm and silica nanoparticles concentration 1000-2000 ppm.