Drainage with Unfavorable Viscosity Ratios: a pore-level model study

Martin Ferer, Grant Bromhal, Duane Smith & Martin Ferer
The applications of carbon dioxide sequestration in brine-saturated reservoirs, as well as recovery of oil from oil-wet reservoirs, involve the injection of a less- viscous, non-wetting fluid into a porous medium occupied by a more-viscous, wetting fluid: i.e., drainage with an unfavorable viscosity ratio. In these cases, there is a competition between capillary fingering and viscous fingering. In standard treatments of two-phase flow in porous media, the flow is assumed to be compact, with a...
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