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MEASURED ANISOTROPY IN PIERRE SHALE *
Author(s) -
WHITE J. E.,
MARTINEAUNICOLETIS L.,
MONASH C.
Publication year - 1983
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1983.tb01081.x
Subject(s) - transverse isotropy , anisotropy , geology , oil shale , isotropy , mineralogy , phase velocity , seismic anisotropy , seismogram , igneous petrology , particle velocity , geophysics , seismology , engineering geology , mechanics , physics , optics , paleontology , volcanism , tectonics
A bstract The five elastic coefficients which characterize a transversely isotropic medium have been measured for the Pierre Shale. The first‐arrival times deduced from two closely spaced vertical seismic profiles provide values of magnitude and direction of the phase velocity at a given depth for different locations of the sources. From these velocities, we can estimate the five elastic coefficients by assuming that the P‐ and SV‐wave velocities have only a small dependence on the angle of propagation. On the other hand, it is shown that the accuracy in the difference between the directions of propagation and particle motion is not sufficient to determine the anisotropy. This work was industrially sponsored through the Integrated Geophysics Project.