A dynamic model of CO2 diffusion coefficient in shale based on the whole process fitting

CO2 diffusion is of great importance for enhanced oil recovery (EOR), production prediction, and performance forecast of carbon capture and storage (CCS) in shale reservoirs. This work aims to determine the diffusion coefficient of the shale reservoir during CO2 huff and puff development. Firstly, combining pressure decay experiments and mathematical modeling studies, this paper developed a dynamic method to determine the diffusion coefficients...