séminaire "Matière Molle et Complexe" - Alexis Mauray (IPR)

Alexis Mauray (IPR) donnera un séminaire intitulé : "Study of foams flows properties in model porous media"

In enhance oil recovery (EOR), to limit viscous fingering, foams are injected by co-injection of a gas and a solution of surfactants in porous media in order to improve oil recovery efficiency. This work focuses on foam transport mechanisms in model porous media using a heterogeneous micromodel made in NOA [1].
We studied the transport properties of foam in a model porous medium. Direct measurements show that the pressure drop induces by the flow can be at Ca=10-6 as high as 3000 times the pressure corresponding to water injected at the same injection flow rate. This ratio decreases with capillary number like foam flow in rocks [2,3]. An analysis of the preferential paths by direct observations shows that, for low relative gas flow rate, only a few paths are active. However, an increase of the capillary number or the relative gas flow rate leads to a homogenization of the flow in the medium. Thanks to different simple models of straight or wavy channels, we measure that the pressure drop induced by a single bubble follows two regimes.

References :

1. B. Levaché, A. Azioune, M. Bourrel, V. Studer, and D. Bartolo, Lab on a Chip, 12, 3028-3031, (2012),

2. M. Lotfollahi, R. Farajzadeh, M. Delshad, A. Varavei, and W.R. Rossen. Journal of Natural Gas Science and Engineering, 31, 184-197, (2016),

3. O. Gassara, F. Douarche, B. Braconnier, and B. Bourbiaux, Journal of Petroleum Science and Engineering, 159, 588-602 (2017).