Experimental and numerical study of the EOR potential in liquid-rich shales by cyclic gas injection

Our experimental data and simulation results have demonstrated the potential of gas huff-n-puff injection to improve oil recovery in shale oil reservoirs. We also examined the effect of diffusion on improved oil recovery performance by cyclic injection process. The objective of this paper is to investigate significance of possible factors on gas huff-n-puff recovery process in shale oil reservoirs via experimental work and simulation approaches. Our simulation results benchmarked with experimental observations showed that molecular diffusion played a significant role in the mobilization of oil in lab scale.