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P/S Separation of Multi-component Seismogram Recorded in Anisotropic MediaNormal access

Authors: C.L. Wang and J.B. Cheng
Event name: 79th EAGE Conference and Exhibition 2017
Session: Multi-component Seismic Acquisition, Processing and Interpretation A
Publication date: 12 June 2017
DOI: 10.3997/2214-4609.201701035
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 664.22Kb )
Price: € 20

Summary:
The multi-component receiver records complete wavefields, which include both P- and S-wave modes. The combination of P- and S-wave characteristics yields better insight into rock properties in the sub-surface. We propose a new approach to decoupling different wave modes in multi-component gather in anisotropic media. By solving the quartic dispersion relation and eigenvalue problem of the Christoffel equation, the polarization vectors of different wave modes can be obtained on the acquisition surface. Accordingly, one can decouple different wave modes both into scalar and vector forms by projecting elastic wavefields onto polarization-related directions in the frequency-wavenumber domain. Synthetic examples demonstrate the validity of the proposed method.


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