摘要：A surfactant flood model for a three-component (petroleum, water, surfactant), two-phase (aqueous, oleic) system is presented and analyzed. It is ruled by a system of nonlinear, partial, differential equations: the continuity equation for the transport of each component, Darcy’s equation for the flow of each phase and algebraic equations. This system is numerically solved in the one-dimensional case by finite differences using a procedure implicit in pressure and explicit in concentrations. The simulator is fed with the physical properties that are concentration dependent functions– such as phase behavior, interfacial tension, relative permeabilities, residual saturations, phase viscosities, adsorption and others. Measurement of these properties is difficult and sometimes hampered by couplings. That is why the main issue in simulation of surfactant flooding is the unavailability of data. Therefore, the purpose of this paper is twofold. First, to describe with detail those phase properties and their relationships. We have found that the partition of the three-components between the two-phases determines all other physical property data and hence the oil recovery. Second, to present a sensitivity analysis of the influence of that partition on cumulative oil recovered as a function of time.
