1887

Abstract

Summary

Full-waveform tomography (FWT) is notorious for its strong dependence on the initial model. We present a workflow for the construction of initial velocity-models for FWT methods consisting of automatic time-migration velocity analysis by means of double multi-stack migration, followed by time-to-depth conversion by image-ray wavefront propagation. Evaluation of the converted velocity model as an initial velocity model in an acoustic FWT process indicates the potential of using a combination of these methods to achieve a fully automatic tool for initial-model building in a FWT workflow. Our tests on a modified version of the Marmousi-2 model have shown that correct background velocity information can be successfully extracted from automatic time-domain migration velocity analysis even in media where time-migration cannot provide satisfactory seismic images.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201600638
2016-05-30
2024-04-19
Loading full text...

Full text loading...

References

  1. Alford, R.M., Kelly, K.R. and Boore, D.M.
    [1974] Accuracy of finite-difference modeling of the acoustic wave equation. Geophysics, 39(6), 834–842.
    [Google Scholar]
  2. Berenger, J.P.
    [1994] A Perfectly Matched Layer for the Absorption of Electromagnetic Waves. Journal of Computational Physics, 114, 185–200.
    [Google Scholar]
  3. Biondi, B. and Almomin, A.
    [2014] Simultaneous inversion of full data bandwidth by tomographic full-waveform inversion. Geophysics, 79(3), WA129–WA140.
    [Google Scholar]
  4. Bohlen, T.
    [2002] Parallel 3D viscoelastic finite difference seismic modelling. Computers and Geosciences, 28, 887–899.
    [Google Scholar]
  5. Kurzmann, A., Köhn, D., Przebindowska, A., Nguyen, N. and Bohlen, T.
    [2009] 2D Acoustic Full Waveform Tomography: Performance and Optimization. In: Extended Abstracts, 71st Conference and Technical Exhibition. EAGE.
    [Google Scholar]
  6. Kurzmann, A., Przebindowska, A., Kohn, D. and Bohlen, T.
    [2013] Acoustic full waveform tomography in the presence of attenuation: a sensitivity analysis. Geophysical Journal International, 195(2), 985–1000.
    [Google Scholar]
  7. Landa, E., Fomel, S. and Moser, T.J.
    [2006] Path-integral seismic imaging. Geophysical Prospecting, 54(5), 491–503.
    [Google Scholar]
  8. Martin, G.S., Marfurt, K.J. and Larsen, S.
    [2002] Marmousi-2: An updated model for the investigation of AVO in structurally complex areas. In: SEG Technical Program Expanded Abstracts, 72 Annual International Meeting. SEG, 1979–1982.
    [Google Scholar]
  9. Mora, P.
    [1987] Elastic inversion of field data. SEP report, 51, 211–218.
    [Google Scholar]
  10. [1989] Inversion= migration+ tomography. Geophysics, 54(12), 1575–1586.
    [Google Scholar]
  11. Prieux, V., Lambaré, G., Operto, S. and Virieux, J.
    [2012] Building starting models for full waveform inversion from wide-aperture data by stereotomography. Geophysical Prospecting, 61, 109–137.
    [Google Scholar]
  12. Schleicher, J. and Costa, J.C.
    [2009] Migration velocity analysis by double path-integral migration. Geophysics, 74(6), WCA225–WCA231.
    [Google Scholar]
  13. Tarantola, A.
    [1984] Inversion of seismic reflection data in the acoustic approximation. Geophysics, 49(8), 1259–1266.
    [Google Scholar]
  14. Valente, L.S.S.
    [2013] Evaluation of algorithms for the conversion of velocity models from time to depth. Master’s thesis, Federal University of Pará. In Portuguese.
    [Google Scholar]
  15. Valente, L.S.S., Santos, H.B., Costa, J.C. and Schleicher, J.
    [2014] A strategy for time-to-depth conversion and velocity estimation. Annual WIT Report, 18, 137–151.
    [Google Scholar]
  16. Versteeg, R.
    [1994] The Marmousi experience: Velocity model determination on a synthetic complex data set. The Leading Edge, 13, 927–936.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201600638
Loading
/content/papers/10.3997/2214-4609.201600638
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