Document Type : Article
Department of chemistry, Islamic Azad University branch of Tehran North, P.O. Box 1913674711,Tehran, Iran
Nanothechnology Research Center, Research Institute of Petroleum Industry (RIPI), P.O. Box 14665-1998,Tehran, Iran
We have prepared Nanoporous Graphene/Silica Nanohybrid and demonstrated its better Pickering emulsion properties for Chemical Enhanced Oil Recovery in comparison to the similar Silica Nanohybrid with single-walled carbon nanotube. The samples were characterized with X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM) and Thermal Gravimetry Analysis (TGA).
Emulsion phase morphology was investigated with optical microscopic image. Evaluation results demonstrated that the best samples are 70% Nanoporous Graphene/SiO2 (both methods) and 70% SWCNT/ SiO2 Nano hybrid (method 1). Contact angle measurement results showed that the 70% Nanoporous Graphene/SiO2Nanohybrid (method 2) is more effective for 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 70% Nanoporous Graphene/SiO2 Nano hybrid (method 2). This result indicates preference of 70% Nano porous Graphene/SiO2 Nanohybrid (method 2) for decreasing the interfacial tension in comparison to the other samples.