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| Titel |
Elastic envelope inversion using multicomponent seismic data without low frequency |
| VerfasserIn |
C. Huang, L. Dong, Y. Liu, B. Chi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2198-5634
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics Discussions ; 1, no. 2 ; Nr. 1, no. 2 (2014-12-05), S.1757-1802 |
| Datensatznummer |
250115134
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| Publikation (Nr.) |
 copernicus.org/npgd-1-1757-2014.pdf |
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| Zusammenfassung |
| Low frequency is a key issue to reduce the nonlinearity of elastic full waveform inversion. Hence,
the lack of low frequency in recorded seismic data is one of the most challenging problems in
elastic full waveform inversion. Theoretical derivations and numerical analysis are presented in
this paper to show that envelope operator can retrieve strong low frequency modulation signal
demodulated in multicomponent data, no matter what the frequency bands of the data is. With the
benefit of such low frequency information, we use elastic envelope of multicomponent data to
construct the objective function and present an elastic envelope inversion method to recover the
long-wavelength components of the subsurface model, especially for the S-wave velocity
model. Numerical tests using synthetic data for the Marmousi-II model prove the effectiveness of the
proposed elastic envelope inversion method, especially when low frequency is missing in
multicomponent data and when initial model is far from the true model. The elastic envelope can
reduce the nonlinearity of inversion and can provide an excellent starting model. |
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