Impact of nanoparticles–surfactant solutions on carbon dioxide and methane wettabilities of organic-rich shale and CO2/brine interfacial tension: Implication for carbon geosequestration

Rock wetting behaviour and CO2/brine interfacial tension (IFT) have significant impacts on enhanced hydrocarbon recovery (EOR) carbon geo-sequestration (CGS) projects. Influence of nanoparticles/surfactant solutions (NPS) flooding EOR CGS in sandstone carbonate formation been examined recent studies. But the impact NPS dioxide (CO2) methane (CH4) wettabilities organic-rich shale IFT is presently unclear. Thus, we measured contact angles, [advancing (θa) receding (θr)] for CH4/brine Marcellus with high total organic (14.8 wt%), as well Krüss drop shape analyzer (DSA 100) through sessile pendant techniques. Prior to angles measurement, samples were aged evaluate treatment CO2 geo-storage. Low-cost rice husk silica nanoparticles saponin surfactant used study due their environmental friendliness economic attractiveness. At geo-storage conditions (25 MPa 353 K), advancing angle untreated was θa=116.22° (CO2-wet condition), whereas θr=82.88° (near neutral wettability). However, θa reduced by 56.34° θr 56.76° when substrate treated 0.1 wt% SiO 2 0. solutions. CO2/NPS lower than CH4 wettability significantly at all investigated conditions. Contact decreased temperature increased CO2/CH4 pressure, exhibited an opposite trend. The reduction adsorption trapping from unconventional reservoirs.