1887

Abstract

Summary

For elastic full waveform inversion (EFWI), additional strategies are required to alleviate the trade-off effects between parameters during the inversion. The reliably separated P and S wave data subsets provided by wave mode decomposition are helpful for the multiparameter inversion. The conjugate-gradient method based on mode decomposition can mitigate parameter trade-offs similarly to Gaussian-Newton method. We compare the two methods and try to find the connection between them by analyzing the contribution of decomposed adjoint P or S wavefields to the inversion. Finally, synthetic example on the constant-density Marmousi-II model proves the validity of mode decomposition based conjugate gradient method for mitigating parameter trade-offs.

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/content/papers/10.3997/2214-4609.201601544
2016-05-30
2024-04-24
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References

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