Shale dynamic properties and anisotropy under triaxial loading

Joël Sarout (1) , Laurent Molez (1) , Yves Guéguen (1) , Nasser Hoteit (2)

1 LGENS - Laboratoire de géologie de l'ENS
2 ANDRA - Agence nationale pour le gestion des déchets radioactifs

This paper is concerned with the experimental identification of the whole dynamic elastic stiffness tensor of a transversely isotropic clayrock from a single cylindrical sample under loading. Measurement of elastic wave velocities (pulse at 1 MHz), obtained under macroscopically undrained triaxial loading conditions are provided. Further interpretation of the velocity measurements is performed in terms of (i) dynamic elastic parameters ; and (ii) elastic anisotropy. A discussion concerning microcracks and fluid content (saturation) issues follows. Experiments were performed on a Callovo-Oxfordian shale, Jurassic in age, recovered from a depth of 613 m in the eastern part of Paris basin in France.

Domaines: Construction durable; Matériaux composites et construction; Réhabilitation

Joël Sarout, Laurent Molez, Yves Guéguen, Nasser Hoteit. Shale dynamic properties and anisotropy under triaxial loading. Poromechanics III - Biot Centennial (1905-2005), May 2005, Norman, Oklahoma, United States. ⟨10.1201/NOE0415380416.ch94⟩. ⟨hal-01421817⟩