Identification of poroelastic constants of deep argillaceous rocks. II: Inverse analysis

Brice Lecampion (1) , Andrei Constantinescu (1)

1 LMS - Laboratoire de mécanique des solides

This paper discusses the identification of poroelastic constants from drained isotropic confinement and pulse test. Closed form solutions of the direct problem are obtained for a very thin specimen. The validity of these solutions for a realistic aspect ratio of the core is assessed by a comparison with a finite element model. The identification problem is solved by minimizing a least square functional using an explicit gradient and a Levenberg-Marquardt algorithm. Uniqueness of this inverse problem as well as the effect of noise on input data are fully discussed. The identification procedure is then applied to measurements performed on a deep argillaceous rock (argillite of Meuse Haute-Marne).

Domaines: Mécanique des solides [physics.class-ph]

Brice Lecampion, Andrei Constantinescu. Identification of poroelastic constants of deep argillaceous rocks. II: Inverse analysis. Second Biot Conference on Poromechanics, Aug 2002, Grenoble, France. pp.245-250, ⟨10.1201/9781003078807-37⟩. ⟨hal-00116360⟩