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Abstract

Summary

High-quality converted wave (PS) imaging and amplitude variation with offset (AVO) products can assist geological interpretation and are important to decouple the response of pressure and fluid effects. Ultra-high density ocean-bottom node (UHDOBN) acquisition over Clair Ridge, West of Shetland, U.K., was designed to record low seismic frequencies that were preserved and enhanced by processing including source deghosting. Model building added velocity details and updated the low-frequency model by full-waveform inversion and ensured a good PP-PS tie through joint PP-PS tomography with an event match constraint.

AVO QC was extended to PS data and applied during processing to monitor wavelet stability and amplitude compliance for the post-migration workflow. Post-migration processing led to an improvement in wavelet predictability and reduced side lobes that can be advantageous for the inversion. PS AVO QC may also be applied for pre-migration processing steps.

PP-PS joint AVO inversion for velocity and density showed improved property estimates and match to well logs when compared to single wavefield inversions. High-quality PS imaging and successful inversion has increased confidence in using PS inversion products beyond imaging, to assist with interpretation between wells.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.201900885
2019-06-03
2024-04-27

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References

  1. Ball, M., Mathieson, A. and Soulas, S.
    [2017] Evolution of LoFS Surveillance on the Clair Field. EAGE Practical Reservoir Monitoring Workshop, Extended Abstracts.
     [Google Scholar]
  2. Barnola, A.S. and Ibram, M.
    [2012] 3D simultaneous joint PP-PS AVO seismic inversion in Schiehallion field, UKCS. 74th EAGE Conference and Exhibition, Extended abstracts.
     [Google Scholar]
  3. Bullock, A., Bekhtin, Y., Ortin, M., Mathewson, J., Henneberg, K. and Sæbø, A.
    [2015] Improved imaging with PP-PS simultaneous joint tomography over the Grane field. 85th Annual International Meeting, SEG, Expanded Abstracts, 2094–2097.
     [Google Scholar]
  4. Connolly, P.
    [2018] Seismic information and the limits of inversion. PETEX conference, London, UK
     [Google Scholar]
  5. Davies, D.M.D., Mannaerts, H.C., McGarrity, J., Ibram, M., McKenzie, C., Campbell, S. and Van Gestel, J.-P.
    [2011] High-Density OBC-A Step Change in Reservoir Imaging-A BP North Sea View. Society of Petroleum Engineers. doi:10.2118/146144‑MS
     https://doi.org/10.2118/146144-MS [Google Scholar]
  6. Duffaut, K., Alsos, T., Landro, M., Rogno, H. and Al-Najjar, N.F.
    [2000] Shear-wave elastic impedance. The Leading Edge, 1222–1229.
     [Google Scholar]
  7. Martin, N. and Stewart, R.R.
    [1994] The effect of low frequencies on seismic analysis. CREWES Research Report, v6, 2-1–2-8.
     [Google Scholar]
  8. Narayanasamy, R., Barr, D., and Milne, A.
    [2009] Wellbore Instability Predictions Within the Cretaceous Mudstones, Clair Field, West of Shetlands. Society of Petroleum Engineers.
     [Google Scholar]
  9. Ortin, M., Bullock, A. and Cooke, A.
    [2016] Unlocking the potential of seabed seismic. PETEX, London
     [Google Scholar]
  10. Philip, N., Ball, M., Riley, D and Tillotson, P.
    [2018] Well ties for converted wave data with an example from the Clair Field, UKNS. 80th EAGE Conference and Exhibition, Extended Abstracts.
     [Google Scholar]
  11. Roy, S. and Bullock, A.
    [2018] Full-Waveform Inversion overcomes imaging challenges West of Shetland – Imaging Clair Ridge. PETEX Conference & Exhibition, Extended Abstracts.
     [Google Scholar]
  12. Smith, L., Ball, M., Riley, D., Davies, D. and Tillotson, P.
    [2019]. Clair Ridge OBN: 3D Benefits from a 4D Baseline. 81st EAGE Conference & Exhibition, Extended Abstracts.
     [Google Scholar]
  13. Tillotson, P., Davies, D., Ball, M. and Smith, L.
    [2019]. Learnings from processing the densest OBN survey in the UKCS. 81st EAGE Conference & Exhibition, Extended Abstracts.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201900885
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Converted Wave AVO QC and Joint PP-PS Density Inversion at Clair Ridge
Conference Proceedings 2019, 1 (2019); https://doi.org/10.3997/2214-4609.201900885
/content/papers/10.3997/2214-4609.201900885
/content/papers/10.3997/2214-4609.201900885
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