... of three important problems, namely, the pressure transient analysis, unstable miscible displacements, and two-phase flows. In the study of multiphase flows, we apply a new and robust front detection method. The numerical dispersion is eliminated by a highorder total variation diminishing (TVD) method...

... to correctly predict the progress of a multi-contact miscible displacement has not been fully verified This paper investigates the physical processes occurring during multi-contact miscible displacement the ability of the Coats correlation to model the changes in gas-oil relative permeabilities...

... fingering miscible displacement upstream oil & gas permeability heterogeneity enhanced recovery spe 25235 heterogeneous porous media permeability distribution flow in porous media gravity segregation transition heterogeneity reservoir simulation gravity united states government...

...Governing equations With an assumption of the fluids being incompressible, the coupled differential equations describing miscible displacement of oil by solvent in a two-dimensional reservoir, following the Darcy's law, are given by (8a) u → = − k μ ∇ p (8b...

... ABSTRACT Our objective is improved understanding of how to model the effects of heterogeneity and viscous fingering in adverse-mobility-ratio miscible displacements. We hypothesize that a formulation along the lines of Young, modified to allow for distinct longitudinal and transverse...

... showing: Unstable miscible displacement in one dimension. Unstable miscible displacement in two dimensions. Interaction between phase behavior and fingering effect in a near-miscible gas injection process. Comparisons with a compositional model without fingering effect are also presented...

... ABSTRACT A numerical method is developed for solving the convection-diffusion equation arising from the conservation equations used to represent miscible displacement processes. This method is superior to the conventional finite difference methods in that it introduces only a negligible amount...

... orientation problems is presented and applied to miscible displacement in a porous medium. The base method utilizes characteristic flow directions to model convection and finite elements to treat the diffusion and dispersion. The characteristic approach also minimizes certain overshoot difficulties which...

... . Chaudhari , N. M. , " An Improved Numerical Technique for Solving Multidimensional Miscible Displacement , Soc. of Pet. Eng. J. ( September 1971 ), 277 – 284 . Laumbach , D. D. , " A High Accuracy Finite-Difference Technique for Treating the Convection-Diffusion Equation ," Society...

... ABSTRACT An efficient method for modeling convection-dominated flows is presented and applied to miscible displacement in a porous medium. The method uses characteristics to model convection and finite elements for diffusion and dispersion, thereby treating each physical process with a well...