Modeling the interface resistance in low soluble gaseous solvents-heavy oil systems

► Dilute dissolution of gases into heavy oil was modeled accounting for 3 parameters. ► The unknown parameters were diffusion and mass transfer coefficients and solubility. ► It models both equilibrium and non-equilibrium interface boundary conditions. ► This model uses the pressure decay data directly for the parameter estimation. ► Determination of k value does not necessarily imply for physical interface resistance. ► Correct modeling of interface physics leads to accurate estimation of the parameters.