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SUMMARY:CO2 storage in and CH4 recovery from coals seams: adsorption-induc
 ed stresses and variations of permeability
DTSTART:20161118T121500
DTEND:20161118T131500
DTSTAMP:20260427T220716Z
UID:6adda54052fee9a8d317239e239c8340770ac171e77b80dd83b0ad31
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dr Matthieu Vandamme\, Assistant Professor and Researche
 r at Laboratoire Navier\, Ecole des Ponts ParisTech\, Université Paris-Es
 t\, Champs-sur-Marne\, France\nAbstract : During production of methane fro
 m 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.\nCoal 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 atom
 s of the coal solid. Variations of permeability of the seam are a conseque
 nce of this adsorption in sub-nanometer pores: adsorption induces an expan
 sion 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 lead
 s to a decrease of permeability.\nIn terms of modeling\, we present an ext
 ension of the poromechanical approach to microporous solids and adsorption
  effects. One originality of the model is that\, rather than focusing on s
 trains induced by adsorption\, we focus on the mechanical stresses this ad
 sorption 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 (a
 s observed in the field)\, and that desorption can even lead to mechanical
  failure of the coal sample.\n\nBio : 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 mater
 ials by nanoindentation. He is also engineer from Ecole Polytechnique (Fra
 nce) and from École Nationale des Ponts et Chaussées (France)\, and rece
 ived an M.S. in solid mechanics from École Nationale des Ponts et Chauss
 ées in 2002. He was awarded the 2016 ASCE EMI Leonardo da Vinci Award.\n
  \nSince 2008\, he has been working at Laboratoire Navier (ENPC\, CNRS\, 
 IFSTTAR)\, at École Nationale des Ponts et Chaussées. He performs Materi
 als Science applied to materials relevant for Civil and Petroleum Engineer
 ing (i.e.\, cementitious materials\, coal\, clay-based materials…). More
  precisely\, his main interest lies in the mechanics and physics of porous
  solids.\n \nMore information can be found at: http://navier.enpc.fr/~van
 damme
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STATUS:CONFIRMED
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