INFLUENCE OF CAPILLARY-PRESSURE, ADSORPTION AND DISPERSION ON CHEMICAL FLOOD TRANSPORT PHENOMENA

This is the second of two joint papers which study the influence of se veral physical properties on the transport phenomena in chemical flood ing. To that aim, we use a previously reported ternary two-phase model into which representative physical properties have been incorporated as concentration-dependent functions. Physical properties such as phas e behavior, interfacial tensions, residual saturations, relative perme abilities, phase viscosities and wettability have been analyzed in the first paper. In this paper, we discuss the influence of capillary pre ssure, adsorption of the chemical component onto the rock and dispersi on. Although arising from different phenomenological sources, these tr ansport mechanisms show some similar effects on concentration profiles and on oil recovery. They are studied for systems with different phas e behavior. A numerical analysis is also presented in order to determi ne the relevance of the number of grid blocks taken in the discretizat ion of the differential equations. This numerical analysis provides us eful guidelines for the selection of the appropriate numerical grid in each type of displacement.