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Small-pore sizes on the order of nanometers in unconventional reservoirs lead to a large capillary pressure, which significantly affects the phase behavior of fluid mixture and the fluid transport process. Although there are some efforts on studying the capillary pressure effect on phase behavior, it has not been clearly understood until recently in the field application considering multiple components...
CO2 storage is a process in which CO2 is injected into depleted oil and gas reservoirs or deep aquifers to store CO2 through several mechanisms. Since supercritical CO2 phase and saline brine are immiscible at a wide range of pressure and temperature in a permeable medium, capillary pressure exists between the CO2 and saline brine. Although there have been many efforts to study solubility of CO2 in...
Capillary force is an important factor that limits the efficiency of water flooding by trapping the oil in porous media. High capillarity is caused by high interfacial tension (IFT) between oil and water that leads to a high residual oil saturation. Surfactants are widely used to reduce IFT and significantly mobilize the entrapped oil. However, the surfactants that are injected into a reservoir to...
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