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- W2146016838 abstract "SummaryThe use of four-component shear wave data (two orthogonal horizontal shear source components and two orthogonal horizontal receiver components) has been shown to be useful for analysis of the primary direction of shear wave anisotropy. Several different criteria have been proposed for the analysis of the data to determine the primary direction. These may be classified into categories; analysis of the amplitudes of the principal and cross components, and analysis of the correlation of the two principal shear wave components. Methods in each of these categories are compared on two VSP data sets and the advantages and limitations of each method with regard to real data are noted. Interesting properties of the principal shear wave components which influence the analysis methods are highlighted.Complementary methods for determining the degree of anisotropy are explored. These include full waveform inversion of the principal shear wave components and analysis of amplitudes on the reflected wavefield. A full waveform inversion method which incorporates both direct and reflected wavefields is shown to give definitive results when compared to analysis using only the traveltime difference between the two shear wave components." @default.
- W2146016838 created "2016-06-24" @default.
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- W2146016838 date "1991-12-01" @default.
- W2146016838 modified "2023-09-26" @default.
- W2146016838 title "Azimuthal anisotropy analysis from shear VSPs" @default.
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- W2146016838 doi "https://doi.org/10.1111/j.1365-246x.1991.tb01423.x" @default.
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