▎ 摘　　要

We prepared nanoporous graphenejsilica nanohybrid and, demonstrated its better Pickering emulsion properties for Clherriimd Enhanced Oil Recovery in comparison to the similar silica nanohybrid with a single -walled carbon Ilanotube. The samples were characterized with X -Ray Diffraction (X.R.D), Field Emission Scanning Electron Microscopy (FE-SEM), and Thermal Graviraetry Analysis (TO A). Emulsion phase morphology was investigated with optical microscopic irmage. Evaluation results dellionstrated that the best, samples are 70% nanoporous graphene/SiO2 (both methods) and 70% SWCINT/SiO2 nanohybrid (Alethod 1). Contact angle measurement, results showed that 70% nanoporous graphene/SiO2 nanohybrid (Method 2) is more effective in the improvement, of the stone reservoir wettability alteration from oil -wet to water -wet. Interfacial tension results indicate that the maximum amount is related to the injection of water, and the minimum amount is related to the injection of nanofluid of TO% nanoporous graphene/SiO2 nanohybrid (McAttod 2). 'Phis result indicates the preference of 70% nanoporous graphene/SiO2 nanohybrid (Method 2) for decreasing the interfacial tension in comparison to the other samples. (C) 2017 Sharif University of Technology. rights reserved.