Stability analysis of the moving interface in piston- and non-piston-like displacements

Abstract

From the macroscopic point of view, expressions involving reservoir and operational parameters are established for investigating the stability of moving interface in piston-and non-piston-like displacements. In the case of axisymmetrical piston-like displacement, the stability is related to the moving interface position and water to oil mobility ratio. The capillary effect on the stability of moving interface depends on whether or not the moving interface is already stable and correlates with the wettability of the reservoir rock. In the case of non-piston-like displacement, the stability of the front is governed by both the relative permeability and the mobility ratio.

Simulation of liquid–liquid interfaces in porous media

“…In this paper we are interested in interfaces between two liquids in contact inside a porous material separating the two immiscible phases. This non-dispersive contact can be found in several technological processes such as membrane supported liquid-liquid extractions [23][24][25][26][27], the so-called pertraction, aquifer remediation [28], and the immiscible displacement of oil [29][30][31]. In the pertraction process the porous material plays the role of immobilizing the interface across which the mass transfer takes place.…”