Composition Paths in Binary C02-C10 Displacements: Effects of Reservoir Heterogeneity and Crossflow on Displacements with Limited Solubility

Material balance equations are formulated for the flow of two-phase, two-component mixtures in a porous medium consisting of two layers with differing permeabilities. Effects of viscous crossflow between the layers are modeled under the assumption that enough crossflow has taken place that fluids in the two layers are in vertical pressure equilibrium. The resulting set of coupled hyperbolic partial differential equations is solved using the method of characteristics. Example solutions are reported for displacements of decane by 002. Three layer permeability ratios are considered, 1.5, 3.0, and 10.0, and the solutions are compared with the corresponding solutions without fluid crossflow.