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Journal of Porous Media
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ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v11.i8.60
pages 781-789

Experimental Study of the Influence of Gravity and Injected-Gas Flow Rate on Drainage in Two-Dimensional Porous Media

Hanene Ouerfelli
IMFT
Mustapha Najjari
Laboratoire d'Etudes des Systemes Thermiques et Energetiques, Cite Riadh, Zirig 6072 Gabes, Tunisia
Z. Baouab
Laboratoire d'Etudes des Systemes Thermiques et Energétiques, Ecole Nationale d'Ingénieurs de Monastir, Monastir 5019, Tunisia
Sassi Ben Nasrallah
Laboratoire d'Études des Systèmes Thermiques et Énergétiques, Ecole Nationale d'Ingénieurs de Monastir, Monastir 5019 Tunisie

RÉSUMÉ

The immiscible displacement of an oil phase from a porous medium was studied experimentally. The porous medium is represented by a random two-dimensional model pore network (micromodel) etched in resin. The micromodel is transparent to allow optical observations of the drainage process. In all experiments, the oil phase is displaced by an air phase injected in a center point of the micromodel at a constant flow rate. The porous medium plane is inclined to the horizontal direction to check the effects of gravity forces, and the injection flow rate was changed in a range such that viscous forces in the invading phase become important. Results on the stabilizing and destabilizing gravity and viscous forces are obtained as a function of the inclination angle value. It has been shown that both stabilizing and destabilizing effects are reduced at high injection flow rate values.


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