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Abstract

Summary

This paper revisits a North Sea OBC dataset that had Full Waveform Inversion (FWI) first applied to it three years ago. The aim is to use the lessons learnt in that period to improve the P-wave velocity FWI and subsequent Reverse Time Migration (RTM) image. The goal is ambitious: to generate a FWI product to the same maximum frequency as the RTM, namely 40 Hz. The progress to date is reported and the current FWI results to 22 Hz (at time of submission) are shown. Through the combination of increased practical experience, knowing how to get the best out of the input data, and also an updated FWI algorithm, the results in both the FWI velocity model and RTM image have been significantly improved. Finally, the discoveries from this study in terms of both the benefits and drawbacks of high frequency FWI are discussed.

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/content/papers/10.3997/2214-4609.20141419
2014-06-16
2020-07-04
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References

  1. Nangoo, T., Warner, M., Morgan, J., Umpleby, A., Stekl, I. and Bertrand, A.
    [2012] Full-waveform Seismic Inversion at Reservoir Depths. 74th EAGE Conference & Exhibition, W015.
    [Google Scholar]
  2. Ratcliffe, A., Win, C., Vinje, V., Conroy, G., Warner, M., Umpleby, A., Stekl, I., Nangoo, T. and Bertrand, A.
    [2011] Full waveform inversion: A North Sea OBC case study. SEG Technical Program Expanded Abstracts, 2384–2388.
    [Google Scholar]
  3. Vinje, V., Ratcliffe, A., Bertrand, A., Hellmann, T. and Belhassen, Y.
    [2012] Improved PP- and PS Imaging Using Full Waveform Inversion - Tommeliten OBC Case Study. 74th EAGE Conference & Exhibition, W010.
    [Google Scholar]
  4. Warner, M., Morgan, J., Umpleby, A., Stekl, I. and Guasch, L.
    [2012] Which Physics for Full-wavefield Seismic Inversion?74th EAGE Conference & Exhibition, W029.
    [Google Scholar]
  5. Warner, M., Ratcliffe, A., Nangoo, T., Morgan, J., Umpleby, A., Shah, N., Vinje, V., Stekl, I., Guasch, L., Win, C., Conroy, G. and Bertrand, A.
    [2013] Anisotropic 3D full-waveform inversion. Geophysics, 78(2), R59–R80.
    [Google Scholar]
  6. Zhang, Y., Zhang, H. and Zhang, G.
    [2011] A stable TTI reverse time migration and its implementation. Geophysics, 76(3), WA3–WA11.
    [Google Scholar]
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