1887

Abstract

Summary

Typically, the oil and gas industry only acquires high-resolution seismic data and multi-beam hydro-acoustic data as part of classical site surveys, mostly used for identification of shallow drilling hazards. However, in this paper we demonstrate that utilization of these kind of high-resolution data sets provide significant additional information of great value for shallow fluid flow assessment.

We present results from an integrated multi-scale geophysical analysis of shallow fluid flow in the Leierdjupet fault complex in the SW Barents Sea aiming at improving the assessment of a prospective shallow hydrocarbon accumulation, i.e. de-risking the retention. For this purpose, we carried out an interpretation of high-resolution 2D seismic data, multibeam bathymetry and water column imaging data acquired as part of a research collaboration between the University of Tromsø and DEA Norge in July 2017.

The combination of geophysical methods operating at different scales enabled us to close the gap between geological structures observed in the deeper subsurface and fluid escape features at the seafloor. Thereby, we obtained a complete holistic understanding of the complex leakage pathways and source-to-sink plumbing mechanisms, which is crucial to delineate and de-risk the retention of the shallow HC accumulation.

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/content/papers/10.3997/2214-4609.201801645
2018-06-11
2024-04-18
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References

  1. Andreassen, K., Laberg, J. S. and Vorren, T. O.
    [2008] Seafloor geomorphology of the SW Barents Sea and its glacidynamic implications. Geomorphology, 97, 157–177, doi:10.1016/j.geomorph.2007.02.050
    https://doi.org/10.1016/j.geomorph.2007.02.050 [Google Scholar]
  2. Andreassen, K., Hubbard, A.L., Winsborrow, M., Patton, H., Vadakkepuliyambatta, S., Plaza-Dittmers, K., Dunbar, A., Davies, R., Mackie, S., Petersen, J. and Bünz, S.
    [2018] How low can you go? - Exploring for shallow oil in the Barents Sea. Submitted to 80th EAGE Conference2018
    [Google Scholar]
  3. Faverola, A., Gudlaugsson, E., Serov, P., Deryabin, A., Mattingsdal, R., Mienert, J. and Bünz, S.
    [2017] Massive blow-out craters formed by hydrate-controlled methane expulsion from the Arctic seafloor. Science, 356(6341), 948–953, doi:10.1126/science.aal4500.
    https://doi.org/10.1126/science.aal4500 [Google Scholar]
  4. Patton, H., Andreassen, K., Bjarnadóttir, L.R., Dowdeswell, J.A., Winsborrow, M.C.M., Noormets, R., Polyak, L., Auriac, A. and Hubbard, A.
    [2015] Geophysical constraints on the dynamics and retreat of the Barents Sea ice sheet as a paleobenchmark for models of marine ice sheet deglaciation. Rev. Geophys., 53, 1051–1098, doi:10.1002/2015RG000495.
    https://doi.org/10.1002/2015RG000495 [Google Scholar]
  5. Portnov, A., Vadakkepuliyambatta, S., Mienert, J. and Hubbard, A.
    [2016] Ice-sheet-driven methane storage and release in the Arctic. Nature Communications, 7, doi:10.1038/ncomms10314.
    https://doi.org/10.1038/ncomms10314 [Google Scholar]
  6. Rajan, A., Bünz, S., Mienert, J. and Smith, A.
    [2013] Gas hydrate systems in petroleum provinces of the SW-Barents Sea, Marine and Petroleum Geology, 46, 92–106, doi:10.1016/j.marpetgeo.2013.06.009.
    https://doi.org/10.1016/j.marpetgeo.2013.06.009 [Google Scholar]
  7. Serov, P., Vadakkepuliyambatta, S., Mienert, J., Patton, H., Portnov, A., Silyakova, A., Panieri, G., Carroll, M., Carroll, J., Andreassen, K. and Hubbard, A.
    [2017] Postglacial response of Arctic Ocean gas hydrates to climatic amelioration. Proceedings of the National Academy of Sciences of the United States of America, 114(24), 6215–6220, doi:10.1073/pnas.1619288114.
    https://doi.org/10.1073/pnas.1619288114 [Google Scholar]
  8. Vadakkepuliyambatta, S., Bünz, S., Mienert, J. and Chand, S.
    [2013] Distribution of subsurface fluid-flow systems in the SW Barents Sea. Marine and Petroleum Geology, 43, 208–221, doi:10.1016/j.marpetgeo.2013.02.007.
    https://doi.org/10.1016/j.marpetgeo.2013.02.007 [Google Scholar]
  9. Vadakkepuliyambatta, S., Hornbach, M. J., Bünz, S. and Phrampus, B. J.
    [2015] Controls on gas hydrate system evolution in a region of active fluid flow in the SW Barents Sea. Marine Petroleum Geology, 66(4), 861–872, doi:10.1016/j.marpetgeo.2015.07.023.
    https://doi.org/10.1016/j.marpetgeo.2015.07.023 [Google Scholar]
  10. Vadakkepuliyambatta, S., Bünz, S., Tasianas, A. and Mienert, J.
    [2016] Iceberg ploughmarks in the SW Barents Sea imaged using high-resolution P-Cable 3D seismic data. Geological Society London Memoirs, 46(1), 281–282, doi:10.1144/M46.113
    https://doi.org/10.1144/M46.113 [Google Scholar]
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