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Characterization Of Shear-Wave Velocity Anisotropy In The Upper 33 M Of A Dipping, Consolidated Sandstone
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 12th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, Mar 1999, cp-202-00081
Abstract
The extraction of groundwater or hydrocarbons from the subsurface and the effective remediation<br>of contaminated sites depend upon knowledge of preferential fluid migration. Shear-waves (s-waves)<br>have proven to be an effective tool to ascertain fracture orientation and the stress regimes responsible for<br>fractures. Grain and void alignment due to stratigraphy, rock texture and intergranular pore space can<br>cause s-waves velocity anisotropy, or variations in velocity with direction. S-waves with particle motion<br>parallel to the stiffer direction of the medium propagate faster than those parallel to the more compliant<br>direction of the medium.