THE IMPACT OF SPARKLING MECHANISM ON IMPROVING OIL RECOVERY THROUGH NANO-PARTICLE INJECTION – EXPERIMENTAL STUDY

Nano-material and nano-particles are used in oilfields to enhance injection processes by changing wettability of porous media, increasing the viscosity of injecting fluid, decreasing the interfacial tension between injection fluid and reservoir fluid. Light alcohol-based Nano-fluids decrease the underriding of injection fluid and improve the vertical sweep efficiency. In addition small size of Nano-particles makes it possible to push the oil in the small poresthat remains unrecoverable in polymer injection (named Inaccessible Pore Volume). Besides continuous fluid bulks, there is another advantageabout dispersed particles; dispersed particles can hit the porous media wall and remove the oil on the wall. This mechanism that is called sparkling significantlyimproves the oil recovery factor in comparison with the same viscosity polymeric fluid