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Phase distributions in a porous medium after the first breakthrough
Arabian Journal of Geosciences ( IF 1.327 ) Pub Date : 2020-05-22 , DOI: 10.1007/s12517-020-05416-5
Hanene Ouerfelli; Mustapha Najjari; Sassi BenNasrallah

In this study, we analyze experimentally the immiscible displacement of an oil phase from a porous medium. A 2D pore network etched in resin was considered as a random porous medium. This micromodel is made with a transparent material to allow direct visualization of the drainage process. In all experiments, the porous model is initially saturated with an oil-phase, which is displaced by an air phase. Air is injected continuously at a constant flow rate in a centre point of the micromodel. In this paper, we present an experimental characterization of the evolution of the gas cluster after the first breakthrough. We discuss the dependence of the phase distributions on viscous forces, capillary forces and flow rate injection. We have noticed that for low air rates injection, the main gas cluster is detached and connected at the permeable edge. The detachment and the connection durations are periodic and depend on fluids properties.
更新日期:2020-05-22
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