1887
ASEG-PESA 24th International Geophysical Conference and Exhibition: Special Issue on Case Studies
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

[

We present a study of prestack depth imaging for data from the South China Sea, including complex geologies, using an enhanced work flow. The imaging results and data analysis prove that the enhanced work flow consisting of cutting edge technologies is effective when complex geologies are present.

,

We present a case study of prestack depth imaging for data from the South China Sea using an enhanced work flow with cutting edge technologies. In the survey area, the presence of complex geologies such as carbonate pinnacles and gas pockets creates challenges for processing and imaging: the complex geometry of carbonates exhibits 3D effect for wave propagation; deriving velocity inside carbonates and gas pockets is difficult and laborious; and localised strong attenuation effect from gas pockets may lead to absorption and dispersion problems. In the course of developing the enhanced work flow to tackle these issues, the following processing steps have the most significant impact on improving the imaging quality: (1) 3D ghost wavefield attenuation, in particular to remove the ghost energy associated with complex structures; (2) 3D surface-related multiple elimination (SRME) to remove multiples, in particular multiples related to complex carbonate structures; (3) full waveform inversion (FWI) and tomography-based velocity model building, to derive a geologically plausible velocity model for imaging; (4) -tomography to estimate the model which describes the intrinsic attenuation of the subsurface media; (5) de-absorption prestack depth migration (-PSDM) to compensate the earth absorption and dispersion effect during imaging especially for the area below gas pockets. The case study with the data from the South China Sea shows that the enhanced work flow consisting of cutting edge technologies is effective when the complex geologies are present.

]
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2016-09-01
2026-01-24

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References

  1. Aki, K., and Richards, P. G., 1980, Quantitative seismology: theory and methods: W. H. Freeman & Co.
  2. Bunks C. Saleck F. M. Zaleski S. Chavent G. 1995 Multiscale seismic waveform inversion: Geophysics 60 1457 1473 10.1190/1.1443880
    https://doi.org/10.1190/1.1443880 [Google Scholar]
  3. Causse E. Mittet R. Ursin B. 1999 Preconditioning of full waveform inversion in viscoacoustic media: Geophysics 64 130 145 10.1190/1.1444510
    https://doi.org/10.1190/1.1444510 [Google Scholar]
  4. Etgen J. Gray S. Zhang Y. 2009 An overview of depth imaging in exploration geophysics: Geophysics 74 WCA5 WCA17 10.1190/1.3223188
    https://doi.org/10.1190/1.3223188 [Google Scholar]
  5. Hu, W., Liu, J., Bear, L., and Marcinkovich, C., 2011, A robust and accurate seismic attenuation tomography algorithm: SEG Technical Program, Expanded Abstracts, 2727–2731.
  6. Hung, B., Wang, X., Phan, Y. P., Xin, K. F., He, Y., Alai, R., Rahman N. N., and Tang, W. H., 2015, Full broadband processing including total Q compensation in the presence of gas: SEG Technical Program, Expanded Abstracts, 4080–4084.
  7. Lin, D., Young J., Huang Y., and Hartmann M., 2004, 3D SRME application in the Gulf of Mexico: SEG Technical Program, Expanded Abstracts, 1257–1260.
  8. Mittet R. 2007 A simple design procedure for depth extrapolation operators that compensate for absorption and dispersion: Geophysics 72 S105 S112 10.1190/1.2431637
    https://doi.org/10.1190/1.2431637 [Google Scholar]
  9. Poole, G., 2013, Pre-migration receiver de-ghosting and re-datuming for variable depth streamer data: 83rd Annual International Meeting, SEG, Expanded Abstracts, 4216–4220.
  10. Pratt R. G. 1999 Seismic waveform inversion in the frequency domain, part 1: theory and verification in a physical scale model: Geophysics 64 888 901 10.1190/1.1444597
    https://doi.org/10.1190/1.1444597 [Google Scholar]
  11. Pratt R. G. Shipp R. M. 1999 Seismic waveform inversion in the frequency domain, part 2: fault delineation in sediments using crosshole data: Geophysics 64 902 914 10.1190/1.1444598
    https://doi.org/10.1190/1.1444598 [Google Scholar]
  12. Quan Y. Harris J. M. 1997 Seismic attenuation tomography using the frequency shift method: Geophysics 62 895 905 10.1190/1.1444197
    https://doi.org/10.1190/1.1444197 [Google Scholar]
  13. Ratcliffe A. Jupp R. Wombell R. Body G. Durussel V. Fernandes A. Gosling B. Lombardi M. 2013 Full-waveform inversion of variable-depth streamer data: an application to shallow channel modeling in the North Sea: The Leading Edge 32 1110 1115 10.1190/tle32091110.1
    https://doi.org/10.1190/tle32091110.1 [Google Scholar]
  14. Sirgue, L., 2006, The importance of low frequency and large offset in waveform inversion: 68th Annual International Conference and Exhibition, EAGE, Extended Abstracts, A037.
  15. Soubaras R. Dowle R. Sablon R. 2012 BroadSeis: enhancing interpretation and inversion with broadband marine seismic: CSEG Recorder 37 40 46
    [Google Scholar]
  16. Tarantola A. 1984 Inversion of seismic reflection data in the acoustic approximation: Geophysics 49 1259 1266 10.1190/1.1441754
    https://doi.org/10.1190/1.1441754 [Google Scholar]
  17. Traynin, P., Liu, J., and Reily, J. M., 2008, Amplitude and bandwidth recovery beneath gas zones using Kirchhoff prestack depth Q-migration: 78th Annual International Meeting, SEG, Expanded Abstracts, 2412–2416.
  18. Verschuur D. J. Berkhout A. J. 1997 Estimation of multiple scattering by iterative inversion, part II: practical aspects and examples: Geophysics 62 1596 1611 10.1190/1.1444262
    https://doi.org/10.1190/1.1444262 [Google Scholar]
  19. Virieux J. Operto S. 2009 An overview of full-waveform inversion in exploration geophysics: Geophysics 74 WCC1 WCC26 10.1190/1.3238367
    https://doi.org/10.1190/1.3238367 [Google Scholar]
  20. Wang, P., Ray, S., Peng, C., Li, Y., and Poole, G., 2013, Premigration deghosting for marine streamer data using a bootstrap approach in tau-p domain: 83rd Annual International Meeting, SEG, Expanded Abstracts, 4221–4225.
  21. Wang, P., Ray, S., and Nimsaila, K., 2014, 3D joint deghosting and crossline interpolation for marine single-component streamer data: 84th Annual International Meeting, SEG, Expanded Abstracts, 3594–3598.
  22. Warner M. Ratcliffe A. Nangoo T. Morgan J. Umpleby A. Shah N. Vinje V. Štekl I. Guasch L. Win C. Conroy G. Bertrand A. 2013 Anisotropic 3D full-waveform inversion: Geophysics 78 R59 R80 10.1190/geo2012‑0338.1
    https://doi.org/10.1190/geo2012-0338.1 [Google Scholar]
  23. Wu X. Hung B. 2015 High-fidelity adaptive curvelet domain primary-multiple separation: First Break 33 53 59
    [Google Scholar]
  24. Xie, Y., Xin, K. F., Sun, J., Notfors, C., Biswal, A. K., and Balasubramaniam, M. K., 2009, 3D prestack depth migration with compensation for frequency dependent absorption and dispersion: 79th Annual International Meeting, SEG, Expanded Abstracts, 2919–2923.
  25. Xin, K. F., and Hung, B., 2010, 3-D tomographic Q inversion for compensating frequency dependent attenuation and dispersion: 79th Annual International Meeting, SEG, Expanded Abstracts, 4014–4018.
  26. Xin, K. F., He, Y., Xie, Y., Xu, W. Q., and Wang, M., 2014, Robust Q tomographic inversion through adaptive extraction of spectral features: 84th Annual International Meeting, SEG, Expanded Abstracts, 3726–3730.
  27. Zhang J. F. Wu J. Z. Li X. Y. 2013 Compensation for absorption and dispersion in prestack migration: an effective Q approach: Geophysics 78 S1 S14 10.1190/geo2012‑0128.1
    https://doi.org/10.1190/geo2012-0128.1 [Google Scholar]
  28. Zhou, J., Wu, X. D., Teng, K. H., Xie, Y., Lefeuvre, F., Anstey, I., and Sirgue, L., 2013, FWI-guided Q tomography and Q-PSDM for imaging in the presence of complex gas clouds, a case study from offshore Malaysia: 83rd Annual International Meeting, SEG, Expanded Abstracts, 4765–4769.
  29. Zhou, J., Li, J. Y., Ng, H., Birdus, S., Teng, K. H., Phan, Y. P., Sun, J., He, Y., and Chia, P., 2014, Unlocking the full potential of broadband data with advanced processing and imaging technology, a case study from NWS Australia: 84th Annual International Meeting, SEG, Expanded Abstracts, 3689–3693.
/content/journals/10.1071/EG16009
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Enhanced 3D prestack depth imaging of broadband data from the South China Sea: a case studyFN1
Exploration Geophysics 47, 219 (2016); https://doi.org/10.1071/EG16009
/content/journals/10.1071/EG16009
/content/journals/10.1071/EG16009
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  • Article Type: Research Article
Keyword(s): broadband, model building, prestack depth imaging, Q-tomography.

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