1887

Abstract

Summary

Reflection waveform inversion (RWI) and its alternative - joint full waveform inversion (JFWI), are powerful tools for improving initial velocity model building beyond the diving-wave penetration depth. Such approaches rely on the scale separation between the smooth background model controlling the kinematics and the model perturbation characterizing the rapid local variations. The key difficulty in RWI and JFWI is the intensive computational cost introduced by alternating between the background velocity update and the model perturbation reconstruction. To update the background model at each step, a number of iterations are generally required to accurately reconstruct the model perturbation such that the alternating workflow becomes prohibitively expensive. To get rid of this computational intensity, we combine RWI or JFWI with efficient impedance waveform inversion which introduces the approximate inverse preconditioner. This approximate inverse approach contains only wave-equation-based operators and is formulated in the time domain.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201901342
2019-06-03
2020-04-05
Loading full text...

Full text loading...

References

  1. Beylkin, G.
    [1985] Imaging of discontinuities in the inverse scaterring problem by inversion of a causal generalized Radon transform. Journal of Mathematical Physics, 26, 99–108.
    [Google Scholar]
  2. Brossier, R., Operto, S. and Virieux, J.
    [2015] Velocity model building from seismic reflection data by full waveform inversion. Geophysical Prospecting, 63, 354–367.
    [Google Scholar]
  3. Chavent, G., Clément, F. and Gòmez, S.
    [1994] Automatic determination of velocities via migration-based traveltime waveform inversion: A synthetic data example. SEG Technical Program Expanded Abstracts 1994, 1179–1182.
    [Google Scholar]
  4. Li, Y. and Chauris, H.
    [2018] Coupling direct inversion to common-shot image-domain velocity analysis. Geophysics, 83(5), R497–R514.
    [Google Scholar]
  5. Métivier, L., Brossier, R. and Virieux, J.
    [2015] Combining asymptotic linearized inversion and full waveform inversion. Geophysical Journal International, 201(3), 1682–1703.
    [Google Scholar]
  6. Qin, B., Allemand, T. and Lambaré, G.
    [2015] Full waveform inversion using preserved amplitude reverse time migration. In: SEG Technical Program Expanded Abstracts 2015. 1252–1257.
    [Google Scholar]
  7. Xu, S., Wang, D., Chen, F., Lambaré, G. and Zhang, Y.
    [2012] Inversion on Reflected Seismic Wave. SEG Technical Program Expanded Abstracts 2012, 1–7.
    [Google Scholar]
  8. Zhou, W., Brossier, R., Operto, S. and Virieux, J.
    [2015] Full Waveform Inversion of Diving & Reflected Waves for Velocity Model Building with Impedance Inversion Based on Scale Separation. Geophysical Journal International, 202(3), 1535–1554.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201901342
Loading
/content/papers/10.3997/2214-4609.201901342
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