title: Local wettability reversal during steady-state two-phase flow in porous media.
abstract: We study the effect of local wettability reversal on remobilizing immobile fluid clusters in steady-state two-phase flow in porous media. We consider a two-dimensional network model for a porous medium and introduce a wettability alteration mechanism. A qualitative change in the steady-state flow patterns, destabilizing the percolating and trapped clusters, is observed as the system wettability is varied. When capillary forces are strong, a finite wettability alteration is necessary to move the system from a single-phase to a two-phase flow regime. When both phases are mobile, we find a linear relationship between fractional flow and wettability alteration.
authors: Department of Physics, Norwegian University of Science and Technology, N-7491 Trondheim, Norway. Santanu.Sinha@ntnu.no
authors: Santanu
authors: S
authors: Sinha
authors: Morten
authors: M
authors: Grøva
authors: Torgeir Bryge
authors: TB
authors: Ødegården
authors: Erik
authors: E
authors: Skjetne
authors: Alex
authors: A
authors: Hansen