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Abstract

Summary

In a given correct background velocity model, conventional migration methods accurately position reflectors but generally fail to recover amplitudes, typically small scale velocity perturbations. The reason is that migration, adjoint of the modeling operator, does not compensate for geometrical spreading, uneven illumination nor limited acquisition geometry. We provide a wave-equation-based shot-profile constant density true-amplitude migration formula. This is a variant compared to a recently published approach, that better behaves in the presence of heterogeneities close to the source position. The formula is derived from the asymptotic ray-based approach, but the final expression only contains wave-equation-based operators. This pseudo-inverse outputs velocity variations with correct amplitudes and phases, in the sense that Born modeling reproduces the data with good accuracy. We validate the method on the Marmousi model.

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/content/papers/10.3997/2214-4609.201701364
2017-06-12
2024-04-20

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References

  1. Beylkin, G.
    [1985] Imaging of discontinuities in the inverse scattering problem by inversion of a causal generalized Radon transform. Journal of Mathematical Physics, 26(1), 99.
     [Google Scholar]
  2. Bleistein, N.
    [1987] On the imaging of reflectors in the earth. Geophysics, 52(7), 931–942.
     [Google Scholar]
  3. Chauris, H. and Cocher, E.
    [2017] From migration to inversion velocity analysis. accepted for publication to Geophysics.
     [Google Scholar]
  4. Forgues, E. and Lambaré, G.
    [1997] Parameterization study for acoustic and elastic ray plus born inversion. Journal of Seismic Exploration, 6(2–3), 253–277.
     [Google Scholar]
  5. Hou, J. and Symes, W.W.
    [2015] An approximate inverse to the extended Born modeling operator. Geophysics, 80(6), R331–R349.
     [Google Scholar]
  6. ten Kroode, F.
    [2012] A wave-equation-based Kirchhoff operator. Inverse Problems, 28(11), 115013.
     [Google Scholar]
  7. Lambaré, G., Virieux, J., Madariaga, R. and Jin, S.
    [1992] Iterative asymptotic inversion in the acoustic approximation. Geophysics, 57(9), 1138–1154.
     [Google Scholar]
  8. Lameloise, C.A., Chauris, H. and Noble, M.
    [2015] Improving the gradient of the image-domain objective function using quantitative migration for a more robust migration velocity analysis. Geophysical Prospecting, 63(2), 391–404.
     [Google Scholar]
  9. Qin, B., Allemand, T. and Lambaré, G.
    [2015] Full waveform inversion using preserved amplitude reverse time migration. In: SEG Technical Program Expanded Abstracts 2015. Society of Exploration Geophysicists, 1252–1257.
     [Google Scholar]
  10. Ribodetti, A. and Virieux, J.
    [1998] Asymptotic theory for imaging the attenuation factor Q. Geophysics, 63(5), 1767–1778.
     [Google Scholar]
  11. Zhang, Y., Ratcliffe, A., Roberts, G. and Duan, L.
    [2014] Amplitude-preserving reverse time migration: From reflectivity to velocity and impedance inversion. Geophysics, 79(6), S271–S283.
     [Google Scholar]
  12. Zhang, Y., Xu, S., Bleistein, N. and Zhang, G.
    [2007] True-amplitude, angle-domain, common-image gathers from one-way wave-equation migrations. Geophysics, 72(1), S49–S58.
     [Google Scholar]
  13. Zhang, Y., Zhang, G. and Bleistein, N.
    [2005] Theory of true-amplitude one-way wave equations and true-amplitude common-shot migration. Geophysics, 70(4), E1–E10.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201701364
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An Alternative True-amplitude Common-shot Reverse Time Migration
Conference Proceedings 2017, 1 (2017); https://doi.org/10.3997/2214-4609.201701364
/content/papers/10.3997/2214-4609.201701364
/content/papers/10.3997/2214-4609.201701364
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