1887

Abstract

Summary

The anisotropic elastic full waveform inversion (FWI) is important because many sedimentary rocks have anisotropic properties and seismic waves are partially affected by such properties. However, the multi-parametric FWI for anisotropic media has lots of difficulties due to the complexities induced by multicomponent data and multi-mode conversions of seismic waves. As a fundamental step to design an optimal anisotropic multi-parametric FWI algorithm, we propose a new parameterisation using Poisson’s ratio and Thomsen parameter, ε for the elastic VTI full waveform inversion. We first analyse why the conventional parameterisation for the VTI media fails in recovering reliable subsurface parameters at the same time. The analyses are conducted by employing a new concept of basis virtual source, which can be regarded as an elemental unit to express numerical scatterings induced by a parameter perturbation. As a result, we notice that the conventional parameters have some limitations, particularly in the aspect of the spatial coverage of the gradient direction. Numerical examples for the 2D SEG/EAGE overthrust model show that the FWI using the new parameterisation for the VTI elastic media remarkably improves inversion results without additional inversion stage unlike the hierarchical inversion.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20141084
2014-06-16
2020-04-05
Loading full text...

Full text loading...

References

  1. Gholami, Y., Brossier, R., Operto, S., Ribodetti, A. and Virieux, J.
    [2013] Which parameterization is suitable for acoustic vertical transverse isotropic full waveform inversion? Part 1: Sensitivity and trade-off analysis. Geophysics, 78, R81–R105.
    [Google Scholar]
  2. Graves, R.W.
    [1996] Simulating seismic wave propagation in 3D elastic media using staggered-grid finite differences. Bulletin of the Seismological Society of America, 86, 1091–1106.
    [Google Scholar]
  3. Lee, H.Y., Koo, J.M., Min, D.J., Kwon, B.D. and Yoo, H.S.
    [2010] Frequency-domain elastic full waveform inversion for VTI media. Geophysical Journal International, 183, 884–904.
    [Google Scholar]
  4. Oh, J.W. and Min, D.J.
    [2013] Spectral filtering of gradient for l2-norm frequency-domain elastic waveform inversion. Geophysical Journal International, 193, 820–840.
    [Google Scholar]
  5. Pratt, R.G., Shin, C. and Hicks, G.J.
    [1998] Gauss-Newton and full Newton methods in frequency-space seismic waveform inversion. Geophysical Journal International, 133, 341–362.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20141084
Loading
/content/papers/10.3997/2214-4609.20141084
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error