1887
  1. Home
  2. A-Z Publications
  3. Geophysical Prospecting
  4. Volume 69, Issue 7
  5. Article
Volume 69, Issue 7
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

Seismic images of Earth's subsurface are essential for oil and gas exploration. Gaussian beam migration is popular for seismic imaging owing to its flexibility and efficiency of implementation. However, the practical use of classic Gaussian beam migration is limited for complicated structures such as subsalt because of poor seismic illumination in those areas. We propose an illumination‐compensated Gaussian beam migration under the framework of least‐squares migration, enhancing the subsalt imaging effectively. A novel scheme based on the Born modelling and migration of Gaussian beam is developed to estimate the point spreading function, with which the illumination compensation can be efficiently implemented in the local wavenumber domain. As the aim of least‐squares migration, the proposed illumination‐compensated Gaussian beam migration produces true‐amplitude images in subsalt areas, which facilitates the seismic interpretation of subsalt structures. The total computational cost of the proposed method includes one Born modelling process and two conventional Gaussian beam migrations, and thus it is much more efficient than the classic least‐squares migration which requires multiple iterations. Numerical examples have demonstrated the effectiveness of the adaptive strategies, manifesting applicable potential in oil and gas exploration of subsalt targets.

© 2021 European Association of Geoscientists & Engineers © 2021 European Association of Geoscientists & Engineers
Loading

Article metrics loading...

/content/journals/10.1111/1365-2478.13117
2021-08-09
2024-04-19

  • From This Site

    /content/journals/10.1111/1365-2478.13117
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Cao, J. (2013) Resolution/illumination analysis and imaging compensation in 3D dip‐azimuth domain. 83rd Annual International Meeting, SEG, Expanded Abstracts, 3931–3936.
  2. Cao, J. and Wu, R.S. (2008) Amplitude compensation of one‐way wave propagators in inhomogeneous media and its application to seismic imaging. Communications in Computational Physics, 3, 203–221.
     [Google Scholar]
  3. Červený, V., Popov, M.M. and Pšenčík, I. (1982) Computation of wave fields in inhomogeneous media – Gaussian beam approach. Geophysical Journal International, 70, 109–128.
     [Google Scholar]
  4. Chen, B. and Xie, X.B. (2015) An efficient method for broadband seismic illumination and resolution analyses. 85th Annual International Meeting, SEG, Expanded Abstracts, 4227–4231.
  5. Etgen, J.T., Foster, D.J. and Zhang, Y. (2016) Introduction to the special section: subsalt imaging. The Leading Edge, 226–227.
     [Google Scholar]
  6. Feng, B., Xu, W., Wu, R.S., Xie, X. and Wang, H. (2020) Finite‐frequency traveltime tomography using the generalized Rytov approximation. Geophysical Journal International, 221, 1412–1426.
     [Google Scholar]
  7. Fletcher, R.P., Nichols, D., Bloor, R. and Coates, R.T. (2016) Least‐squares migration – Data domain versus image domain using point spreading functions. The Leading Edge, 35, 157–162.
     [Google Scholar]
  8. Gelius, L.J., Lecomte, I. and Tabti, H. (2002) Analysis of the resolution function in seismic prestack depth imaging. Geophysics Prospecting, 50, 505–515.
     [Google Scholar]
  9. Gray, S.H. and Bleistein, N. (2009) True‐amplitude Gaussian‐beam migration. Geophysics, 74, P11–P23.
     [Google Scholar]
  10. Guitton, A. (2004) Amplitude and kinematic corrections of migrated images for nonunitary imaging operators. Geophysics, 69, P1017–P1024.
     [Google Scholar]
  11. Henke, C.H., Krieger, M.H., Strack, K. and Zerilli, A. (2020) Subsalt imaging in northern Germany using multiphysics (magnetotellurics, gravity, and seismic). Interpretation, 8, SQ15–SQ24.
     [Google Scholar]
  12. Hill, N.R. (1990) Gaussian beam migration. Geophysics, 55, P1416–P1428.
     [Google Scholar]
  13. Hill, N.R. (2001) Prestack Gaussian beam depth migration. Geophysics, 66, 1240–1250.
     [Google Scholar]
  14. Hu, H., Liu, Y., Zheng, Y., Liu, X. and Lu, H. (2016a) Least‐squares Gaussian beam migration. Geophysics, 81, S87–S100.
     [Google Scholar]
  15. Hu, J., Wang, H., Fang, Z.Li, T. and Zhang, J. (2016b) Efficient amplitude encoding least‐squares reverse time migration using cosine basis. Geophysical Prospecting, 64(6), 1483–1497.
     [Google Scholar]
  16. Huang, X.G., Sun, H. and Sun, J.G. (2016) Born modeling for heterogeneous media using the Gaussian beam summation based Green's function. Journal of Applied Geophysics, 131, 191–201.
     [Google Scholar]
  17. Kang, W., Willingham, B., Kirseman, Z. and Yong, S.L. (2019) Statistical calibration of the point spreading function for image‐domain least‐squares migration. 89th Annual International Meeting, SEG, Expanded Abstracts, 4226–4230.
  18. Kim, Y.S., Tsingas, C. and Jeong, W. (2018) Directional‐oriented wavefield imaging: a new wave‐based subsurface illumination imaging condition for reverse time migration. Geophysical Prospecting, 66(6), 1097–1110.
     [Google Scholar]
  19. Lecomte, I. (2008) Resolution and illumination analyses in PSDM: a ray‐based approach. The Leading Edge, 27, 650–663.
     [Google Scholar]
  20. Leveille, J.P., Jones, L.F., Zhou, Z.Z., Wang, B. and Liu, F.Q. (2011) Subsalt imaging for exploration, production, and development: a review. Geophysics, 76, P3–P20.
     [Google Scholar]
  21. Liu, Q. and Peter, D. (2018) One‐step data‐domain least‐squares reverse time migration. Geophysics, 83, P361–P368.
     [Google Scholar]
  22. Liu, S.Y., Gu, H.M., Han, B., Yan, Z., Liu, D. and Cai, J. (2018) Band‐limited beam propagator and its application to seismic migration. Geophysics, 83, S311–S319.
     [Google Scholar]
  23. Liu, S.Y., Gu, H.M., Yan, Z., Li, H. and Wang, H.Z. (2017) Q‐compensated beam migration with multiscale Gabor transform. Journal of Applied Geophysics, 143, 195–202.
     [Google Scholar]
  24. Liu, S.Y., Wu, R.S., Feng, B., Wang, H.Z. and Guo, S. (2020) A true‐amplitude imaging method based on Gaussian beam migration and demigration. Pure and Applied Geophysics, 177, 4707–4718.
     [Google Scholar]
  25. Liu, Y.K., Chang, X., Jin, D.G., He, R.Q., Sun, H.C. and Zheng, Y.C. (2011) Reverse time migration of multiples for subsalt imaging. Geophysics, 76, P209–P216.
     [Google Scholar]
  26. Mao, J., Sang, S. and Wang, B. (2013) Angle domain illumination analysis along a target horizon. 83rd Annual International Meeting, SEG, Expanded Abstracts, 191–195.
  27. Popov, M.M., Semtchenok, N.M., Popov, P.M. and Verdel, A.R. (2010) Depth migration by the Gaussian beam summation method. Geophysics, 75, P81–P90.
     [Google Scholar]
  28. Schuster, G. and Liu, Z. (2019) Least squares migration: current and future directions. 74th Annual International Meeting, SEG, Expanded Abstracts, R11–R11.
  29. Sun, H., Gao, C. and Zhang, Z. (2019) High‐resolution anisotropic prestack Kirchhoff dynamic focused beam migration. IEEE Sensors Journal, 20, 11753–11760.
     [Google Scholar]
  30. Um, E.S., Commer, M. and Newman, G.A. (2014) A strategy for coupled 3D imaging of large‐scale seismic and electromagnetic data sets: application to subsalt imaging. Geophysics, 79, P1–P13.
     [Google Scholar]
  31. Wang, C., Farmer, P., Burley, T., Calderon, C., Jones, I. and Brittan, J. (2019) Preconditioned reflection full waveform inversion for subsalt imaging. 89th Annual International Meeting, SEG, Expanded Abstracts, 1214–1218.
  32. Wang, P., Huang, S.T. and Wang, M. (2017) Improved subsalt images with least‐squares reverse time migration. 76th Annual International Meeting, EAGE, Expanded Abstracts, 1–29.
  33. Wu, R.S. and Aki, K. (1985) Scattering characteristics of waves by an elastic heterogeneity. Geophysics, 50, P582–P595.
     [Google Scholar]
  34. Wu, R.S., Luo, M.Q., Chen, S.C. and Xie, X.B. (2004) Acquisition aperture correction in angle domain and true‐amplitude imaging for wave equation migration. 74th Annual International Meeting, SEG, Expanded Abstracts, 937–940.
  35. Wu, R.S. and Chen, L. (2006) Directional illumination analysis using beamlet decomposition and propagation. Geophysics, 71, P147–P159.
     [Google Scholar]
  36. Xie, X.B., Wu, R.S., Fehler, M. and Huang, L. (2005) Seismic resolution and illumination: a wave‐equation‐based analysis. 75th Annual International Meeting, SEG, Expanded Abstracts, 1862–1865.
  37. Xie, X.B., Jin, S. and Wu, R.S. (2006) Wave‐equation based seismic illumination analysis. Geophysics, 71, P169–P177.
     [Google Scholar]
  38. Yan, R., Guan, H., Xie, X.B. and Wu, R.S. (2014) Acquisition aperture correction in the angle domain toward true‐reflection reverse time migration. Geophysics, 79, P241–P250.
     [Google Scholar]
  39. Yan, Z. and Xie, X.B. (2016) Full‐wave seismic illumination and resolution analyses: a Poynting‐vector‐based method. Geophysics, 81, P447–P458.
     [Google Scholar]
  40. Yang, K. and Zhang, J.F. (2019) Kirchhoff approximation based least‐squares reverse time migration for subsalt imaging, 89th Annual International Meeting, SEG, Expanded Abstracts, 4236–4240.
  41. Yue, Y.B., Sava, P., Qian, Z.P., Yang, J.D. and Zou, Z. (2019) Least‐squares Gaussian beam migration in elastic media. Geophysics, 84, S329–S340.
     [Google Scholar]
  42. Zambrini, J., Lupinacci, W.M., Gamboa, L.P., Neves, I.A., Cherene, R. and Azul, M.O. (2020) The impact of the complex evaporites features’ on the seismic illumination of the underlying rocks: a case study in the Brazilian presalt. Journal of Petroleum Science and Engineering, 191, 107–177.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.1111/1365-2478.13117
Loading
An illumination‐compensated Gaussian beam migration for enhancing subsalt imaging
Geophysical Prospecting 69, 1433 (2021); https://doi.org/10.1111/1365-2478.13117
/content/journals/10.1111/1365-2478.13117
/content/journals/10.1111/1365-2478.13117
Loading

Data & Media loading...

  • Article Type: Research Article
Keyword(s): Point spreading function; Seismic illumination; Subsalt imaging

Most Cited This Month Most Cited RSS feed

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