1887
Volume 44, Issue 4
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

The incident angle is a very important piece of information in many processing steps for seismic data, but it cannot be easily and directly estimated in many typical and familiar migration processes, such as shot-profile wave equation migration and reverse time migration. In this paper, we first revisit and analyse some popular schemes of estimating the incident-angle field. Then we present a robust method to estimate the incident-angle field in a 2D/3D heterogeneous isotropic media based on a one-way wave propagator. Unlike the band-limited wavefield, the incident-angle field is estimated by the division of two impulse responses of the monochromatic wavefield in order to reduce computation. The impulse responses are the derivative of the angle-weighted image extracted by multiplying an extra imaging weight in the conventional migration process and conventional image. The tilted coordinate system is adopted in our method to avoid the steep-angle limitation of one-way wave propagators. By comparison with other methods, our method can estimate the incident-angle field more accurately with higher efficiency and less memory cost. Computed incident-angle fields of a 2D layered model and 3D field data example demonstrate the generality and flexibility of the method.

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2013-12-01
2026-01-19

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References

  1. Aki, K., and Richards, P. G., 1980, Quantitative seismology: theory and methods: W. H. Freeman Co.
  2. Bleinstein, N., Cohen, J. K., and Stockwell, J. W., 2001, Mathematics of multidimensional seismic inversion: Springer.
  3. Claerbout J. 1971 Toward a unified theory of reflector mapping: Geophysics 36 467 481 10.1190/1.1440185
    https://doi.org/10.1190/1.1440185 [Google Scholar]
  4. de Bruin C. Wapenaar C. Berkout A. 1990 Angle dependent reflectivity by means of prestack migration: Geophysics 55 1223 1234 10.1190/1.1442938
    https://doi.org/10.1190/1.1442938 [Google Scholar]
  5. de Hoop M. V. Le Rousseau J. H. Wu R. S. 2000 Generalization of the phase-screen approximation for the scattering of acoustic waves: Wave Motion 31 43 70 10.1016/S0165‑2125(99)00026‑8
    https://doi.org/10.1016/S0165-2125(99)00026-8 [Google Scholar]
  6. Gazdag J. 1978 Wave equation migration with the phase-shift method: Geophysics 43 1342 1351 10.1190/1.1440899
    https://doi.org/10.1190/1.1440899 [Google Scholar]
  7. Lecomte I. 2008 Resolution and illumination analyses in PSDM: a ray-based approach: The Leading Edge 27 650 663 10.1190/1.2919584
    https://doi.org/10.1190/1.2919584 [Google Scholar]
  8. Liu L. N. Zhang J. F. 2006 3D wavefield extrapolation with optimum split-step Fourier method: Geophysics 71 T95 T108 10.1190/1.2197493
    https://doi.org/10.1190/1.2197493 [Google Scholar]
  9. Muerdter D. Ratcliff D. 2001 Understanding subsalt illumination through ray-tracing modeling, Part 3: salt ridges and furrows, and the impact of acquisition orientation: The Leading Edge 20 803 816 10.1190/1.1487289
    https://doi.org/10.1190/1.1487289 [Google Scholar]
  10. Ristow D. Ruhl T. 1994 Fourier finite-difference migration: Geophysics 59 1882 1893 10.1190/1.1443575
    https://doi.org/10.1190/1.1443575 [Google Scholar]
  11. Sava P. C. Fomel S. 2003 Angle-domain common-image gathers by wavefield continuation methods: Geophysics 68 1065 1074 10.1190/1.1581078
    https://doi.org/10.1190/1.1581078 [Google Scholar]
  12. Sava, P. C., and Fomel, S., 2005, Coordinate-independence angle-gathers for wave equation migration: 75th Annual International Meeting, SEG, Expanded Abstracts, 2052–2057.
  13. Shan, G. J., and Biondi, B., 2004, Imaging overturned waves by plane-wave migration in tilted coordinates: 74th Annual International Meeting, SEG, Expanded Abstracts, 969–972.
  14. Shan, G. J., Clapp, R., and Biondi, B., 2007, 3D plane-wave migration in tilted coordinates: 77th Annual International Meeting, SEG, Expanded Abstracts, 2190–2194.
  15. Shuey R. T. 1985 A simplification of the Zoeppritz equations: Geophysics 50 609 614 10.1190/1.1441936
    https://doi.org/10.1190/1.1441936 [Google Scholar]
  16. Stoffa P. L. Fokkema J. T. De Luna Freire R. M. Kessinger W. P. 1990 Split-step Fourier migration: Geophysics 55 410 421 10.1190/1.1442850
    https://doi.org/10.1190/1.1442850 [Google Scholar]
  17. Sun W. J. Fu L. Y. Zhou B. Z. 2012 Common-angle image gathers for shot-domain migration: an efficient and stable strategy: Exploration Geophysics 43 1 7 10.1071/EG11038
    https://doi.org/10.1071/EG11038 [Google Scholar]
  18. van Vliet, L. J., and Verbeek, P. W., 1995, Estimators for orientation and anisotropy in digitized images: Proceedings of the first Conference of the Advanced School for Computing and Imaging, Heijen (The Netherlands), 442–450.
  19. Xie, X. B., and Wu, R. S., 1998, Improving the wide angle accuracy of screen method under large contrast: 68th Annual International Meeting, SEG, Expanded Abstracts, 1811–1814.
  20. Xie, X. B., and Wu, R. S., 2002, Extracting angle domain information from migrated wavefields: 72nd Annual International Meeting, SEG, Expanded Abstracts, 1360–1363.
/content/journals/10.1071/EG13002
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Robust incident-angle field estimation: a one-way wave propagator approach
Exploration Geophysics 44, 245 (2013); https://doi.org/10.1071/EG13002
/content/journals/10.1071/EG13002
/content/journals/10.1071/EG13002
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  • Article Type: Research Article
Keyword(s): incident angle; one-way wave extrapolation; ray tracing; seismic wave propagation

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