1887

Abstract

Summary

It is well known that imaging of complex regions can be significantly improved with increased illumination in terms of offset and azimuth sampling. In this case study we illustrate how an existing large scale acquisition can be enriched by acquiring a second complementary survey in a targeted area. The second survey was acquired in a direction perpendicular to the first with additional offsets for maximum impact. The long offsets were obtained during a single acquisition pass by utilising a source only vessel positioned ahead of the main source and receiver vessel using simultaneous shooting. The blended data was separated using an annihilation filter approach. In this paper we illustrate the advantages this second survey has brought to the area through improvements in the full waveform inversion velocity model and enhanced illumination for imaging the deep structures.

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/content/papers/10.3997/2214-4609.201700870
2017-06-12
2020-04-09
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References

  1. Firth, J.
    [2016] New Gabon survey demonstrates how better design delivers better data: Seismic profile.
    [Google Scholar]
  2. Guillaume, P., Zhang, X., Prescott, A., Lambare, G., Reinier, M., Montel, P. and Cavalie, A.
    [2013] Multi-layer non-linear slope tomography. 75th EAGE Conference & Exhibition, Extended Abstracts, Th 04 01.
    [Google Scholar]
  3. Mensch, T., Cichy, K., Siliqi, R., Firth, J. and Jupinet, B.
    [2016] Acquisition of long-offset data offshore Gabon shows how synchronized source technology adds flexibility to tailored acquisition solutions. First Break, 34(11), 95–101.
    [Google Scholar]
  4. Rohnke, J. and Poole, G.
    [2016] Simultaneous Source Separation Using an Annihilation Filter Approach. 78th EAGE Conference and Exhibition, Extended Abstracts, We LHR2 08.
    [Google Scholar]
  5. Soubaras, R.
    [2010] Deghosting by joint deconvolution of a migration and a mirror migration. 80th SEG Annual Meeting, Expanded Abstracts, 3406–3410.
    [Google Scholar]
  6. Xiao, B., Kotova, N., Bretherton, S., Ratcliffe, A., Duval, G., Page, C. and Pape, O.
    [2016] An offshore Gabon full-waveform inversion case study. Interpretation, 4(4), SU25–SU39.
    [Google Scholar]
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