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Gas flow through clay barriers
Olivella Pastallé, Sebastià; Alonso Pérez de Agreda, Eduardo
Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica
"Geotechnical Research Medal" de la Institution of Civil Engineers (London)
A model for the simulation of gas flow in clayey rocks and clays is described. Gas migration is associated with the development of preferential paths along existing or pressure-dependent discontinuities. The model handles the combined phenomena of two-phase (air and liquid) flow and the generation of discrete paths. Aperture of discrete paths is the main variable to account for permeability and capillary pressure variations. The model, which has been implemented in a general thermo-hydromechanical code, is used to simulate two experiments (laboratory and field). The laboratory experiment involved gas flow through shale specimens tested in a triaxial cell. In the field experiment, gas flow was forced through a sand–bentonite barrier. Experimental results and model calculations are compared in the paper.
Peer Reviewed
Award-winning
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus
Radioactive waste disposal
Clays and the environment
Case history
Numerical modelling
Partial saturation
Clay -- permeability
Pore pressures
Radioactive waste disposal
Residus radioactius -- Emmagatzematge
Argila
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Artículo
Institution of Civil Engineers (http://www.ice.org.uk/)
         

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