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Abstract

Summary

We present an extension of the 2004 BP velocity model which is suitable for the assessment of cutting-edge seismic imaging methods as FWI applied to ultra long-offset ocean-bottom node (OBN) acquisitions. The 2004 BP model is routinely utilized to benchmark various velocity-model building approaches - in particular those developed to tackle the challenges encountered in geological settings comprising salt structures. Those challenges are typically related to the correct reconstruction of the subsalt structures or the sharp velocity contrasts between the salt bodies and the surrounding sediments. To make this model suitable for testing the emerging long-offset OBN acquisitions, we embed the original 2004 BP model within a crustal-scale velocity model inspired by the structural interpretation of the tomographic results from the GUMBO experiment (Gulf of Mexico). The resulting model allows for wavefield propagation within the rifted continental crust and the upper mantle and therefore for the undershooting of the salt and subsalt structures. Consequently, there is no need for extrapolation of the original BP model boundaries or resizing/resampling of its spatial dimensions. The GOMCRUST can therefore be seen as a geologically consistent evolution of the 2004 BP model, which allows to benchmark various seismic imaging workflow with long-offset OBN surveys.

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/content/papers/10.3997/2214-4609.202112776
2021-10-18
2024-03-29
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References

  1. Avendonk, H.J.V., Christeson, G.L., Norton, I.O. and Eddy, D.R.
    [2015] Continental rifting and sediment infill in the northwestern Gulf of Mexico. Geology, 43(7), 631–634.
    [Google Scholar]
  2. Billette, F.J. and Brandsberg-Dahl, S.
    [2004] The 2004 BP Velocity Benchmark. In: Extended Abstracts, 67th Annual EAGE Conference & Exhibition, Madrid, Spain. B035.
    [Google Scholar]
  3. Blanch, J., Jarvis, J., Hurren, C., Liu, Y. and Hu, L.
    [2019] Designing an exploration scale OBN: Acquisition design for subsalt imaging and velocity determination. In: SEG Technical Program Expanded Abstracts 2019.Society of Exploration Geophysicists.
    [Google Scholar]
  4. Cao, W., Kaus, B.J.P. and Paterson, S.
    [2016] Intrusion of granitic magma into the continental crust facilitated by magma pulsing and dike-diapir interactions: Numerical simulations. Tectonics, 35(6), 1575–1594.
    [Google Scholar]
  5. Gorszczyk, A. and Operto, S.
    [2020] GO_3D_OBS - The multiparameter benchmark geomodel for seismic imaging methods assessment and next generation 3D surveys design. Geoscientific Model Development, submitted.
    [Google Scholar]
  6. Li, Q., Slopey, W., Rollins, F., Billette, F., Udengaard, C. and Thompson, B.
    [2019] Leading a new deep water OBN acquisition era: Two 2017–2018 GoM OBN surveys. In: SEG Technical Program Expanded Abstracts 2019.Society of Exploration Geophysicists, 187–191.
    [Google Scholar]
  7. Mei, J., Zhang, Z., Lin, F., Huang, R., Wang, P. and Mifflin, C.
    [2019] Sparse nodes for velocity: Learnings from Atlantis OBN full-waveform inversion test.Society of Exploration Geophysicists, 167–171.
    [Google Scholar]
  8. Roende, H., Bate, D., Mao, J., Huang, Y. and Chaikin, D.
    [2020] New node acquisition design delivers unprecedented results with Dynamic Matching FWI — case study from the Gulf of Mexico. First Break, 38(9), 73–78.
    [Google Scholar]
  9. Sambolian, S., Operto, S., Ribodetti, A. and Virieux, J.
    [2020] From slope tomography to FWI: is the conventional workflow viable in complex settings?. In: 90th Annual SEG Meeting (Houston).
    [Google Scholar]
  10. Savva, D., Pubellier, M., Franke, D., Chamot-Rooke, N., Meresse, F., Steuer, S. and Auxietre, J.
    [2014] Different expressions of rifting on the South China Sea margins. Marine and Petroleum Geology, 58, 579–598.
    [Google Scholar]
  11. Shen, L., Ahmed, I., Brenders, A., Dellinger, J., Etgen, J. and Michell, S.
    [2018] Full-waveform inversion: the next leap forward in subsalt imaging. The Leading Edge, January, 76b1–67b6.
    [Google Scholar]
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