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3D Pore Geometry of Opalinus Clay - Implications for the Poroelastic Behavior
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Fifth EAGE Shale Workshop, May 2016, Volume 2016, p.1 - 5
Abstract
Poroelastic coefficients related to shale pore microstructures were predicted. The stiffness matrix of the drained porous skeleton was calculated on the base of reconstructed pore microstructures in combination with finite element simulations. Pore microstructures were reconstructed on the base of image data that were acquired by focused ion beam nanotomography. Based on the stiffness matrices, sets of engineering constants related to poroelasticity were calculated. The anisotropic pore structure of Opalinus Clay causes an elastically anisotropic behavior. In particular, the pore structure contributes to both: to the transversely isotropic behavior of Opalinus Clay as well as to the poroelastically anisotropic behavior.