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dc.contributor.authorGurevich, Boris
dc.contributor.authorCollet, O.
dc.contributor.authorPervukhina, M.
dc.contributor.authorMadadi, M.
dc.identifier.citationGurevich, B. and Collet, O. and Pervukhina, M. and Madadi, M. 2013. Anisotropy pattern arising from application of a triaxial stress to a dry isotropic rock, in Proceedings of the Second International Workshop on Rock Physics, Aug 4-9 2013. Southampton: EAGE.

Elastic wave velocities in rocks vary with stress due to the presence of discontinuities and microcracks within the rock. We analytically derive a model for seismic anisotropy caused by small triaxial stresses applied on a linearly isotropic elastic medium permeated by a distribution of cracks with random orientations. This model predicts ellipsoidal anisotropy and also expresses the ratios of Thomsen’s parameters ε/γ as a function of the compliance and Poisson’s ratios in the three orthogonal planes of symmetry. We apply this model to fully estimate the elasticity tensor from log or VSP data and infer P-wave anisotropy from S-wave anisotropy in an area where the anisotropy is known to result from anisotropy of stresses. Besides, this model could be used to differentiate stress-induced anisotropy from that caused by aligned fractures.

dc.titleAnisotropy pattern arising from application of a triaxial stress to a dry isotropic rock
dc.typeConference Paper
dcterms.source.titleSecond International Workshop on Rock Physics
dcterms.source.seriesSecond International Workshop on Rock Physics
dcterms.source.conferenceSecond International Workshop on Rock Physics
dcterms.source.conference-start-dateAug 4 2013
dcterms.source.placeThe Netherlands
curtin.departmentDepartment of Exploration Geophysics
curtin.accessStatusFulltext not available

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