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Gas entry through water-saturated argillite: experimental and numerical approaches

type de publication      communication internationale avec actes publiés
date de publication 28-06-2011
auteur(s) Duveau Gilles; M'Jahad Sofia; Davy Catherine A.; Skoczylas Frédéric; Shao Jian-Fu; Talandier Jean; Granet Sylvie
conférence 45th US Rock Mechanics / Geomechanics Symposium 2011
     dates de 26-06-2011 à 29-06-2011
     lieu San Francisco, California, USA
     nom des actes Proceedings of the American Rock Mechanics Association's 45th U.S. Rock Mechanics / Geomechanics Symposium
  Sous presse
résumé The aim of the present study is to investigate the gas migration properties (gas breakthrough pressure) of fully water-saturated COx argillite. Experimentally, at the laboratory scale, gas breakthrough pressure (GBP) is assessed rather than gas entry, by accurately detecting gas presence on the downstream side of a sample under hydrostatic stress and subjected to slowly increasing gas pressure on its upstream side. Numerically, the GBP text is simulated using a unidimensional coupled finite element model, which accounts for gas dissolution, diffusion in pore water and advection. Mechanical behaviour is described within Biot’s effective stress theory. The aim of the modeling work is to select the set of parameters, which adequately describe the laboratory experiment, in order to use them in further repository structure FE modelling.
mots clés argillite, gas entry pressure, gas breakthrough pressure, FE modelling
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