Compositional Modeling for Optimum Design of Water-Alternating CO₂-LPG EOR under Complicated Wettability Conditions

Figure 9

Interfacial tension between oil and gas phases with injected gas mole fraction after six months of gas injection (LPG composition: 63% propane and 37% butane).

(a) CO₂ 100%

(b) LPG 20%