Abstract
Abstract In enhanced oil recovery processes surfactants and nanoparticles are being widely used mainly due to their properties to reduce the interfacial tension between crude oil and aqueous phase. This results in a stable film of emulsion between these two immiscible fluids in case of surfactants and nanoparticles can form a solid layer at the droplet's interface and stand as a resistant stabilizer under harsh reservoir conditions. This research manifests whether the combination of surfactants and Lysine grafted silica nanoparticle (LGS) can provide a more stable emulsion. Oil in water and water in oil emulsions that are stabilized with different surface coating nanoparticles of uniform size have been developed. LGS was synthesized and characterized with FTIR, FESEM, EDX and TGA for proper understanding. Phase behavior study has been done with respect to salinity and synthesized nanoparticle concentration at high temperature. Prepared emulsions were also characterized by IFT, Micro-emulsion images and rheology. Results showed that synthesized surfactant from jatropha oil with a water continuous phase could give a stable emulsion. More emulsion stability was achieved by adding LGS to surfactant synthesized from jatropha oil. Sandpack flooding results were also found to be in line with the results and showed a greater recovery in the presence of LGS with an additional recovery of 24.6% which was much better the surfactant itself. Results showed that lysine grafted silica Nano-particle in combination with surfactant can be a potential candidate for EOR recovery in comparison to conventional flooding applied in the reservoirs.
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