CO2 storage in and CH4 recovery from coals seams: adsorption-induced stresses and variations of permeability
Event details
| Date | 18.11.2016 |
| Hour | 12:15 › 13:15 |
| Speaker | Prof. Dr Matthieu Vandamme, Assistant Professor and Researcher at Laboratoire Navier, Ecole des Ponts ParisTech, Université Paris-Est, Champs-sur-Marne, France |
| Location | |
| Category | Conferences - Seminars |
Abstract : During production of methane from deep coal seams, or during injection of carbon dioxide in those seams, very significant variations of permeability are observed, which need to be understood and modeled.
Coal contains micropores (i.e., pores with a diameter smaller than 2 nm), in which pore fluid is adsorbed, i.e., in which most fluid molecules are in intermolecular interaction with the atoms of the coal solid. Variations of permeability of the seam are a consequence of this adsorption in sub-nanometer pores: adsorption induces an expansion of the coal matrix, and hence a closure of the cleat system (i.e., a set of fractures naturally present in the coal bed), which in turn leads to a decrease of permeability.
In terms of modeling, we present an extension of the poromechanical approach to microporous solids and adsorption effects. One originality of the model is that, rather than focusing on strains induced by adsorption, we focus on the mechanical stresses this adsorption induces. Experimentally, we show on intact coal cores (i.e., in the lab) that adsorption can induce mechanical stresses of several dozen MPa and variations of permeability of more than two orders of magnitude (as observed in the field), and that desorption can even lead to mechanical failure of the coal sample.
Bio : Matthieu VANDAMME received his Ph.D. from the Civil and Environmental Engineering department at MIT (Cambridge, MA) in 2008, for a study of the creep properties of cementitious materials by nanoindentation. He is also engineer from Ecole Polytechnique (France) and from École Nationale des Ponts et Chaussées (France), and received an M.S. in solid mechanics from École Nationale des Ponts et Chaussées in 2002. He was awarded the 2016 ASCE EMI Leonardo da Vinci Award.
Since 2008, he has been working at Laboratoire Navier (ENPC, CNRS, IFSTTAR), at École Nationale des Ponts et Chaussées. He performs Materials Science applied to materials relevant for Civil and Petroleum Engineering (i.e., cementitious materials, coal, clay-based materials…). More precisely, his main interest lies in the mechanics and physics of porous solids.
More information can be found at: http://navier.enpc.fr/~vandamme
Coal contains micropores (i.e., pores with a diameter smaller than 2 nm), in which pore fluid is adsorbed, i.e., in which most fluid molecules are in intermolecular interaction with the atoms of the coal solid. Variations of permeability of the seam are a consequence of this adsorption in sub-nanometer pores: adsorption induces an expansion of the coal matrix, and hence a closure of the cleat system (i.e., a set of fractures naturally present in the coal bed), which in turn leads to a decrease of permeability.
In terms of modeling, we present an extension of the poromechanical approach to microporous solids and adsorption effects. One originality of the model is that, rather than focusing on strains induced by adsorption, we focus on the mechanical stresses this adsorption induces. Experimentally, we show on intact coal cores (i.e., in the lab) that adsorption can induce mechanical stresses of several dozen MPa and variations of permeability of more than two orders of magnitude (as observed in the field), and that desorption can even lead to mechanical failure of the coal sample.
Bio : Matthieu VANDAMME received his Ph.D. from the Civil and Environmental Engineering department at MIT (Cambridge, MA) in 2008, for a study of the creep properties of cementitious materials by nanoindentation. He is also engineer from Ecole Polytechnique (France) and from École Nationale des Ponts et Chaussées (France), and received an M.S. in solid mechanics from École Nationale des Ponts et Chaussées in 2002. He was awarded the 2016 ASCE EMI Leonardo da Vinci Award.
Since 2008, he has been working at Laboratoire Navier (ENPC, CNRS, IFSTTAR), at École Nationale des Ponts et Chaussées. He performs Materials Science applied to materials relevant for Civil and Petroleum Engineering (i.e., cementitious materials, coal, clay-based materials…). More precisely, his main interest lies in the mechanics and physics of porous solids.
More information can be found at: http://navier.enpc.fr/~vandamme
Practical information
- General public
- Free
Organizer
- Prof. Dr Brice Lecampion & Prof. Dr Katrin Beyer
Contact
- Prof. Dr Brice Lecampion