RESULTS OF ENGINEERING AND GEOPHYSICAL STUDIES OF THE LEDOVOE GAS-CONDENSATE FIELD SITE IN THE BARENTS SEA

  • A. G. Kazanin JSC «Marine Arctic Geological Expedition» (MAGE)
  • V. Yu. Sladkomedova JSC «Marine Arctic Geological Expedition» (MAGE)
  • T. V. Artamonova JSC «Marine Arctic Geological Expedition» (MAGE)
DOI 10.29006/1564-2291.JOR-2025.53(1).3
Keywords Barents Sea, ice plowing furrows, side-scan sonar, isometric objects, isometric depressions, multibeam echo sounding, paleovalley, sonograms

Abstract

The paper presents an analysis of the relief of the bottom of the Ledovoe gas-condensate field site of the Barents Sea based on the obtained results of engineering surveys. One of the main survey methods for obtaining the bottom topography was multibeam echo sounding and sidescan sonar. The methodology of data acquisition and processing is described, and a comparative analysis of bathymetry and side–scan sonar model is presented. As a result of the analysis, the morphology of the bottom was described, and the main forms of relief were identified: ice gouge furrows of the U-shaped and V-shaped type, isometric depressions on the bottom, paleovalley. It was revealed that the gouge furrows have a predominantly northwestern orientation; their depth and morphology may indicate a “paleogeographical” origin. The general model of bottom sonar made it possible to identify both local, predominantly man-made objects on the bottom (trawl grooves) and objects of natural origin (clusters of boulders). The obtained data is the most important information when designing engineering structures in fields.

References


  1. Bell, T., A. K. Cooper, A. Solheim, B. J. Todd, J. A. Dowdeswell, M. Canals, M. Jakobsson, E. K. Dowdeswell, and K. A. Hogan, 2016: Glossary of glaciated continental margins and related geoscience methods. Atlas of Submarine Glacial Landforms: Modern, Quaternary and Ancient. London, Geological Society of London, 555–574.

  2. Geomorfologicheskij slovar-spravochnik, 2002: Ahromeev L. M., Shevchenkov P. G. (Eds.), Bryansk, Izdatelstvo Bryanskogo gosudarstvennogo universiteta.

  3. Lambeck, K., Y. Yokoyama, P. Johnston, and A. Purcel, 2000: Global ice volumes at the last Glacial Maximum. Earth and Planetary Science Letters, 181, 513–527.

  4. Levchenko, O. V. and N. V. Libina, 2018: Formation of bottom topography of the White sea in the late quaternary. Journal of Oceanological Research, 3 (46), 183–192.

  5. Maznev, S. V., O. V. Kokin, V. V. Arhipov, and A. V. Baranskaya, 2023: Sovremennye i reliktovye sledy ajsbergovoj ekzaracii dna Barenceva i Karskogo morej. Oceanology, 1 (63), 95–107.

  6. Mironyuk, S. G., A. A. Ivanova, and A. A. Kolyubakin, 2018: Ekstremalnye glubiny sovremennogo ledovogo vypahivaniya na shelfe severo-vostochnoj chasti Barenceva morej. Rossijskie polyarnye issledovaniya, 1 (31), 12–14.

  7. Nikiforov, S., 2010: Morphogenetic classification of seabed. Seabed morphology of Russian arctic shelf. N.Y.: Nova Publisher, 175–188.

  8. Nikiforov, S. L., R. A. Anan’ev, and N. V. Libina et al., 2019: Ledovaya ehkzaraciya na Arkticheskom shel’fe Rossii, Oceanology, 3 (59), 466–468.

  9. Rybalko, A. E., S. G. Mironyuk, and A. G. Roslyakov et al., 2020: Novye priznaki pokrovnogo oledeneniya v Karskom more: megamasshtabnaya lednikovaya linejnost’ v Vostochno-Novozemel’skom zhelobe. Rel’ef i chetvertichnye obrazovaniya Arktiki, Subarktiki i Severo-Zapada Rossii, 7, 175–181.

  10. Sistema Barenceva morya, 2021: Lisicyn A. P., Agatova A. I., Agafonova E. A., Shipilov E. V., Shkarubo S. I. et al. (Eds.), Moscow, Shirshov Institut of Oceanology of RAS.

  11. Solheim, A., 1997: Depth-Dependent Iceberg Plough Marks in the Barents Sea. Glaciated Continental Margins. Davies T. A. et al. (Eds.), Dordrecht: Springer, 138–139.

  12. Stroitelstvo razvedochnoj skvazhiny №3 Ledovogo mestorozhdeniya. “Plan preduprezhdeniya i likvidacii razlivov nefti i nefteproduktov. Ocenka vozdejstviya na okruzhayushuyu sredu”. 2021. https://seaprojects.gazprom.ru/d/textpage/9b/155/ovos-na-plrn-led-3.pdf.(date of access: 07.10.2024).

  13. Stroitelstvo razvedochnoj skvazhiny № 4 Ledovogo mestorozhdeniya. “Ocenka vozdejstviya na okruzhayushuyu sredu” 2021. https://krasnoyarskgazprom-ngp.gazprom.ru/d/textpage/9b/155/ovos_pd_ledovaya-4.pdf.(date of access: 07.10.2024).

  14. Zamotina, Z. S., A. V. Starovojtov, M. Yu. Tokarev, Ya. E. Teryohina, A. A. Kolyubakin, and A. M. Goncharova, 2023: Paleodoliny i paleodepressii Vostochno-Prinovozemelskogo rajona Karskogo morya. Vestnik Moskovskogo universiteta, 4, Geologiya, 2, 117–127.

  15. Zajonchek, A. V., X. Brekke, and S. U. Sokolov, 2010: Stroenie zony perexoda kontinent–okean severo-zapadnogo obramleniya Barenceva morya (po dannym 24–26-go rejsov NIS “Akademik Nikolaj Straxov”, 2006–2009 gg.). Stroenie i istoriya razvitiya litosfery, Leonov Yu. G. (Eds.), Moscow, 111–157.

Published
2025-03-25
Issue
Vol 53 No 1 (2025): Journal of Oceanological Research
Section
Marine geology, geophysics and geochemistry

Transfer of copyrights occurs on the basis of a license agreement between the Author and Shirshov Institute of Oceanology, RAS