ABSTRACT
ABSTRACT: Effective gas-oil diffusion coefficients in porous media are studied under high temperature and pressure. Diffusion coefficients of gas – condensate oil system and gas – heavy oil system are tested in the full diameter core under 60◦C and 20 MPa, respectively. The results show that the gas diffusion coefficient in PVT apparatus is obviously higher than that in the full diameter core. The gas diffusion coefficient in condensate oil is higher than that in heavy oil.
