Foam flow in a layered, heterogeneous porous medium: A visualization study

Foams can divert flow from high permeability regions to low permeability regions in heterogeneous porous media. In this work, we present a visualization study of foam flow through a two-layer, heterogeneous model, where the performance of foam stabilized by surfactant-nanoparticle mixtures is evaluated. An in-house, 2D sandpack holder was fabricated with a transparent front plate to visualize foam displacement mechanisms. It was packed with two...