A Multiphysics Simulation Framework for CO2 Huff-n-Puff in Shale Oil Reservoirs: Coupling Stress-Dependent Maxwell–Stefan Diffusion and Nanopore Confinement
Summary Diffusion is non-negligible in shale reservoirs due to the ultra-tight matrix, while advection is also strongly stress-sensitive due to well-developed fractures. Yet, most CO2 huff-n-puff (HnP) models still employ Fickian diffusion and static rock properties. This work develops a unified, fully implicit composi...