Determination of anisotropic poroelastic parameters of a transversely isotropic shale by means of consolidated undrained triaxial tests

The authors have previously presented an anisotropic poroelastic constitutive model for application to wellbore stability modelling. To obtain the required parameters, triaxial test apparatus has been developed, which is specially designed for low permeability shales. The development of the test apparatus is described. A series of consolidated undrained triaxial tests and novel tests, referred to as H tests, was carried out on an anisotropic shale. The test procedures and the measured elastic and poroelastic parameters are presented and discussed. Précédemment, les auteurs avaient présento un modéle constitutif de la poro-élasticité anisotrope en vue d’application á la modelisation de la stabilité des forages.…