“…In the mechanistic investigation of bypassed-oil recovery in CO 2 injection (Khosravi et al, 2014), a maximum recovery was achieved at sub-miscible conditions, where the oil swelling and vaporization enhanced the recovery of bypassed oil significantly. Also, it is not always economical or technically feasible to inject a gas that is miscible with oil (Bardon et al, 1994;Al-Wahaibi et al, 2007;Ren et al, 2011). In this research, the focus is on gas floods at sub-miscible (or immiscible) conditions.…”