A multi-step strategy for mitigating severe nonlinearity in elastic full-waveform inversion

Wang Yuwei1 Dong Liangguo1 Huang Chao1 Liu Yuzhu1

(1.State Key Laboratory of Marine Geology, Tongji University, Shanghai, China 200092)

【Abstract】Elastic full-waveform inversion (EFWI) is a powerful tool for estimating high-accuracy subsurface elastic parameters. However the nonlinearity in EFWI is much severer than that in acoustic FWI. We propose a multi-step EFWI strategy to mitigate the nonlinearity for the reconstruction of high-accuracy P- and S-wave velocities. We use envelope-based EFWI as first step to update the long wavelength components of P- and S-wave velocities. Using the envelope-based EFWI's results as initial models, a time-domain modeling based frequency-domain EFWI is used to further reduce nonlinearity and recover short wavelength components of the models with hierarchical multi-scale inversion strategy. The numerical test demonstrates that, when the low frequency and long offset components are not available in seismic data, our multi-step strategy is effective for reconstructing high-accuracy P- and S-wave velocities, especially for S-wave velocity.

【Keywords】 elastic wave; full-waveform inversion; envelope; time domain ; frequency domain ; multi-scale;


【Funds】 National Science and Technology Major Project of the Ministry of Science and Technology of China (2011ZX05005-005-007HZ) National Natural Science Foundation of China (41274116, 41474034)

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This Article


CN: 13-1095/TE

Vol 51, No. 02, Pages 288-294+206

April 2016


Article Outline


  • 1 Introduction
  • 2 Theoretical method
  • 3 Numerical test
  • 4 Conclusions
  • Appendix A Calculation of envelope-based elastic full-waveform inversion (ELEFWI) gradient
  • References