Pore-Scale Investigation of Low-Salinity Nanofluids on Wetting Properties of Oil Carbonate Reservoir Rocks Studied by X-ray Micro-Tomography

Low-salinity surfactant nanofluids have recently shown promising results in the wettability alteration of reservoir rocks from oil-wet state towards more water-wet state. However, investigation pore-level interactions injection real oil carbonate at conditions, which determines overall fluid dynamics, is lacking. Therefore, this work, we studied effect nanoparticles augmented low-salinity flooding on hydrophobic with harsh conditions via X-ray micro-tomography. The designed experiment scheme involved core an transparent core-holder developed for studying flow properties fluids micro level (pore scale). was quantified by measuring differences contact angles after low salinity, surfactant, and nanofluid. findings illustrate that silica had a pronounced influence angle among other injected fluids. rock fell 144° to 49°, corresponding rocks. show addition concentration (0.005 wt.%) SiO2 enough changes This study illustrates combination low-salinity, nanoparticle features has three-phase than if applied separately.