1887

Abstract

Summary

We discuss several difficulties related to the application of Full Waveform Inversion using surface waves in the context of seismic data acquired on an ultra-shallow ground model (0 — 10 m depth). For instance, the choice of an accurate initial velocity model in the presence of very high velocity contrasts is complicated. The presence of surface waves increases local minima problems in the objective function, preventing from convergence towards the global minimum. For improving convergence, we propose to use an alternative functional, the windowed-Amplitude Waveform Inversion, which is similar to dispersion curve analysis but without any picking step. The source wavelet is iteratively estimated during the velocity model inversion. If previous examples have shown that this methodology is applicable in synthetic data sets, it is less obvious in real data sets as discussed here.

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/content/papers/10.3997/2214-4609.20140539
2014-06-16
2019-12-15
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References

  1. Bergamo, P., Boiero, D. and Socco, L.V.
    [2012] Retrieving 2D structures from surface-wave data by means of spatial-varying spatial windowing. Geophysics, 77, EN39–EN51.
    [Google Scholar]
  2. Deidda, G.P. and Balia, R.
    [2001] An ultrashallow SH-wave seismic reflection experiment on a subsurface ground model. Geophysics, 66, 1097–1104.
    [Google Scholar]
  3. Haskell, N.A.
    [1953] The dispersion of surface waves in multilayered media. Bulletin of the Seismological Society of America, 43, 17–34.
    [Google Scholar]
  4. Pérez Solano, C.A.
    [2013] Two-dimensional near-surface seismic imaging with surface waves: alternative methodology for waveform inversion. PhD thesis. 225 p. MINES ParisTech, France.
    [Google Scholar]
  5. Socco, L.V., Foti, S. and Boiero, D.
    [2010] Surface-wave analysis for building near-surface velocity models - Established approaches and new perspectives. Geophysics, 75(5), 75A83–75A102.
    [Google Scholar]
  6. Virieux, J. and Operto, S.
    [2009] An overview of full-waveform inversion in exploration geophysics. Geophysics, 74, WCC1–WCC26.
    [Google Scholar]
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