1887

Abstract

Summary

So-called broadband marine sources have been introduced recently for high-resolution imaging. “GeoSource” is the source component of PGS’ marine broadband seismic acquisition system. With its novel configuration, appropriate seismic processing techniques need to be developed in order to maximize and evaluate its benefits. We develop an effective de-blending, de-ghosting, and de-signature workflow. The workflow consists of three steps: (1) Separating the two sub-sources (deblending); (2) Computing directional ghosted far-field signatures from near-field hydrophone data; (3) Posthumus de-ghosting and de-signature for dual-level sources. High-resolution de-ghosting and de-signature results are obtained, with ghost notches well attenuated, low and high frequency content significantly enhanced, and airgun bubbles effectively collapsed. Compared with the single-level source, the dual-level source is more effective at addressing source ghost removal and low-frequency content enhancement.

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/content/papers/10.3997/2214-4609.201413194
2015-06-01
2020-05-26
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References

  1. Carlson, D., Long, A., Sollner, W., Tabti, H., Tenghamn, R., and Lunde, N.
    [2007] Increased resolution and penetration from a towed dual-sensor streamer, First Break, 25, 71–77.
    [Google Scholar]
  2. Gulunay, N.
    [1986] F-X Decon and the Complex Weiner Prediction Filter for Random Noise Reduction on Stacked Data, 56th SEG Annual International Meeting, Expanded Abstracts.
    [Google Scholar]
  3. Kustowski, B., Tegtmeier-Last, S., Hennenfent, G., Cole, J., and Clark, D.
    [2013], Curvelet noise attenuation guided by a signal or noise model: case studies, 83rd SEG Annual International Meeting, Expanded Abstracts.
    [Google Scholar]
  4. Parkes, G. and Hegna, S.
    [2011] A marine seismic acquisition system that provides a full ‘ghost-free’ solution, 81st SEG Annual International Meeting, Expanded Abstracts, 37–41.
    [Google Scholar]
  5. Posthumus, B.J.
    [1993] Deghosting using a twin streamer configuration, Geophysical Prospecting, 41, 267–286.
    [Google Scholar]
  6. Spjuth, C., Sabel, P.B., Foss, S.K., Dromgoole, P., Friedrich, C., Herredsvela, J., Day, A., Dhelie, P.E., Hegna, S., Høy, T., and Koch, K.
    [2012] Broadband seismic for sub-basalt exploration, 74th EAGE Conference & Exhibition, Extended Abstracts, B036.
    [Google Scholar]
  7. Ziolkowski, A., Parkes, G., Hatton, L., and Haugland, T.
    [1982] The signature of an air gun array: computation from near-field measurements including interactions, Geophysics, 47, 1413–1421.
    [Google Scholar]
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