Skip to Main Content
Book Chapter

Characterization of transport and water retention properties of damaged Callovo-Oxfordian claystone

By
S. M’Jahad
S. M’Jahad
Institute of Mechanical and Industrial Applications, UMR EDF-CNRS-CEA-ENSTA ParisTech 9219, EDF Lab Paris-Saclay, 7 boulevard Gaspard Monge, 91120 Palaiseau, France
Search for other works by this author on:
C. A. Davy
C. A. Davy
Ecole Centrale de Lille and LML UMR CNRS 8107, 59650 Villeneuve d’Ascq, France
Search for other works by this author on:
F. Skoczylas
F. Skoczylas
Ecole Centrale de Lille and LML UMR CNRS 8107, 59650 Villeneuve d’Ascq, France
Search for other works by this author on:
J. Talandier
J. Talandier
ANDRA, 1–7 rue Jean Monnet, 92298 Châtenay-Malabry Cedex, France
Search for other works by this author on:
Published:
January 01, 2017

Abstract

In the context of the underground storage of radioactive waste, the aim of this experimental study is to characterize the effect of damage on transport and water retention properties of Callovo-Oxfordian (COx) argillite. The originality of the study is to simultaneously investigate the pore-size distribution, water retention, the dry, effective and relative gas permeability, and the gas breakthrough pressure (GBP) of damaged COx argillite. These different properties are all relevant to characterizing the fluid transport ability of COx argillite.

Results show that the damage has a significant impact on the properties of the COx argillite. It induces a decrease in its water retention capacity and GBP, and it increases its gas permeability and apparent porosity available to water owing to the creation of micro-cracks.

Another objective is to show which of these properties is the most suitable to detect early damage states in COx argillite, with a potential use being to identify them in situ. GBP appears to be the best ‘detector’ of damage because of its sensitivity to damage even under high confinement pressures. Gas permeability could be a good indicator of damage, as it increases significantly (one or several orders of magnitude) after the damage. Finally, the water permeability curve is a poor indicator of COx argillite damage.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Special Publications

Radioactive Waste Confinement: Clays in Natural and Engineered Barriers

S. Norris
S. Norris
Radioactive Waste Management, UK
Search for other works by this author on:
J. Bruno
J. Bruno
Amphos 21, Spain
Search for other works by this author on:
M. van Geet
M. van Geet
ONDRAF/NIRAS, Belgium
Search for other works by this author on:
E. Verhoef
E. Verhoef
COVRA, The Netherlands
Search for other works by this author on:
Geological Society of London
Volume
443
ISBN electronic:
9781786203267
Publication date:
January 01, 2017

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal