1887
Volume 65, Issue 4
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

This paper addresses two artefacts inherent to marine towed‐streamer surveys: 1) ghost reflections and 2) too sparse a sampling in the crossline direction. A ghost reflection is generated when an upcoming reflection bounces off the sea surface back into the sensors and can, in principle, be removed by decomposing the measured wavefield into its up‐ and downgoing constituents. This process requires a dense sampling of the wavefield in both directions along and perpendicular to the streamers. A dense sampling in the latter direction is, however, often impossible due to economical and operational constraints. Recent multi‐component streamers have been designed to record the spatial gradients on top of the pressure, which not only benefits the wavefield decomposition but also facilitates a lower‐than‐Nyquist sampling rate of the pressure. In this paper, wavefield reconstruction and deghosting are posed as a joint inverse problem. We present two approaches to establish a system matrix that embeds both a deghosting and an interpolation operator. The first approach is derived a ghost model, whereas the second approach is derived a ghost model. The embodiment of a ghost model leads to an even lower sampling rate but relies on a more restrictive assumption on the sea surface.

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2016-09-26
2024-04-20
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References

  1. AmundsenL.1993. Wavenumber‐based filtering of marine point‐source data. Geophysics58(9), 1335–1348.
    [Google Scholar]
  2. AmundsenL., SerestB.G. and ArntsenB.1995. Extraction of the normal component of the particle velocity from marine pressure data. Geophysics60(1), 212–222.
    [Google Scholar]
  3. BurrenJ., ComeauxL., JangelmeG. and MeloR.2013. A MAZ case study from the Jequitinhonha basin, Brazil: combining legacy conventional with dual‐sensor towed‐streamerdata. In: The 13th International Congress of the Brazilian Geophysical Society .
  4. DayA., KlüverT., SöllnerW., TabtiH. and CarlsonD.2013. Wavefield‐separation methods for dual‐sensor towed‐streamer data. Geophysics78(2), WA55–WA70.
    [Google Scholar]
  5. FokkemaJ.T. and van den BergP.M.1993. Seismic Applications of Acoustic Reciprocity. Elsevier Science.
    [Google Scholar]
  6. HardwickA., CharronP., MasoomzadehH., AiyepekuA., CoxP. and LahaS.2015. Accounting for sea surface variation in deghosting–a novel approach applied to a 3D dataset offshore west Africa. International Exposition and 85th SEG annual meeting, Expanded Abstracts.
    [Google Scholar]
  7. HillD., CombeeC. and BaconJ.2006. Over/under acquisition and data processing: the next quantum leap in seismic technology? First Break24, 81–95.
    [Google Scholar]
  8. JerriA.J.1977. The Shannon sampling theorem—Its various extensions and applications: a tutorial review. Proceedings of the IEEE65(11), 1565–1596.
    [Google Scholar]
  9. JiY.2014. Further application of frequency‐diverse filtering ‐ a new 3D deghosting algorithm for streamers. 74th EAGE Conference & Exhibition.
    [Google Scholar]
  10. KamilY., KitchensideP., VassalloM. and ÖzbekA.2014. A study of different greedy algorithms for crossline wavefield reconstruction using multimeasurement towed marine data. Expanded Abstracts.
  11. KingS. and PooleG.2015. Hydrophone‐only receiver deghosting using a variable sea surface datum. International Exposition and 85th SEG annual meeting, Expanded Abstracts.
    [Google Scholar]
  12. KlüverT. and TabtiH.2015. Derivation of statistical sea‐surface information from dual‐sensor towed streamer data. 77th EAGE Conference & Exhibition.
    [Google Scholar]
  13. NyquistH.1928. Certain topics in telegraph transmission theory. Transactions of the American Institute of Electrical Engineers47, 617–644.
    [Google Scholar]
  14. ÖzbekA., VassalloM., ÖzdemirK., van ManenD.‐J. and EggenbergerK.2010. Crossline wavefield reconstruction from multicomponent streamer data: Part 2—Joint interpolation and 3D up/down separation by generalised matching pursuit. Geophysics75, WB69–WB85.
    [Google Scholar]
  15. ÖzdemirK. and ÖzbekA.2007. Method for optimal wave field separation, US Patent 7676327.
  16. ÖzdemirK., ÖzbekA., van ManenD.J. and VassalloM.2010. On data‐independent multicomponent interpolators and the use of priors for optimal reconstruction and 3D up/down separation of pressure wavefields. Geophysics75(6), WB39–WB51.
    [Google Scholar]
  17. PapoulisA.1977. Generalized sampling expansion. IEEE Transactions on Circuits and Systems24(11), 652–654.
    [Google Scholar]
  18. SeidnerD. and FederM.2000. Vectorized sampling expansion. IEEE Transactions on Signal Processing48(5), 1401–2000.
    [Google Scholar]
  19. ShannonC.E.1949. Communication in the presence of noise. Proceedings of the Institute of Radio Engineers37, 10–21.
    [Google Scholar]
  20. SoubarasR. and DowleR.2010. Variable‐depth streamer ‐ a broadband marine solution. First Break28, 89–96.
    [Google Scholar]
  21. TsangL., KongJ.A. and DingK.H.2000. Scattering of Electromagnetic Waves, Vol. 1: Theory and Applications .
  22. van BorselenR., FokkemaJ. and van den BergP.2013. Wavefield decomposition based on acoustic reciprocity: theory and applications to marine acquisition. Geophysics78(2), WA41–WA54.
    [Google Scholar]
  23. VassalloM., ÖzbekA., ÖzdemirK. and EggenbergerK.2010. Crossline wavefield reconstruction from multicomponent streamer data: Part 1—Interpolation by matching pursuit using pressure and its crossline gradient. Geophysics75, WB69–WB85.
    [Google Scholar]
  24. WapenaarC.P.A., PeelsG.L., BudejickyV. and BerkhoutA.J.1988. Inverse extrapolation of primary seismic waves. Geophysics54(7), 853–863.
    [Google Scholar]
  25. WhileJ., BiegertE. and JacksonA.2008. Interpolation of gravity and gravity gradient data by using the generalized sampling expansion: theory. Geophysics73(2), I11–I21.
    [Google Scholar]
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