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Hyperslow drainage

Lefort, Philippe and Prat, Marc Hyperslow drainage. (2012) In: 4th International Conference on Porous Media and its Applications in Science, Engineering and Industry, 17 June 2012 - 22 June 2012 (Postdam, Germany). (Unpublished)

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Abstract

We investigate the process of very slow drainage from pore network simulations in relation with the study of the storage of radioactive waste materials in deep geological formation. The process is characterized by a quite low desaturation of the medium. Considering the special case of a constant stabilizing gradient, we first study the sensitivity of the solution given by the classical continuum two phase flow model to the shape of the retention curve. The solution is found to be very sensitive to the evolution of the retention curve in the range of the high wetting fluid saturations. We show how to construct the retention curve so as to minimize the prediction error with the classical two-phase flow model. Then we consider the immiscible displacement of a non-viscous wetting fluid by a viscous non-wetting fluid and study the influence of the non-wetting fluid relative permeability from three dimensional pore network simulations. Similarly as the retention curve, we show how the relative permeability must be specified in the range of the high wetting fluid saturations so as to obtain optimal predictions from the classical two-phase flow model.

Item Type:Conference or Workshop Item (Lecture)
Audience (conference):International conference without published proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
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Deposited By: Marc PRAT
Deposited On:24 Jan 2014 13:07

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