DANGEROUS GAS-SATURATED OBJECTS ON THE ARCTIC SHELF OF EASTERN SIBERIA, THE FAR EAST (RUSSIA) AND ALASKA (USA)

For the first time, a comprehensive megaregional analysis of features of potential gas saturation of shallow deposits of the Arctic seas of Eastern Siberia, Chukotka and Alaska was carried out for 2086 objects revealed in CDP seismic sections with a total length of 40 thousand km. It was established that the gas saturation of shallow deposits in the studied areas depended on their tectonic activity on late stages of sedimentation. The highest density of distribution of potentially gas-saturated objects was revealed in the Laptev, Chukchi and Bering seas; in the East Siberian Sea it was 5-6 times lower. Also, in this sea, a minimal share of objects near the bottom (up to 100 m) was observed. The results as a whole confirm low tectonic activity (dislocation) at the late stages of sedimentation in the East Siberian Sea, which concurs with the pattern of the CDP seismic sections. The results can serve as important information for increasing the efficiency and safety of oil and gas exploration in the studied offshore areas.

1. Bogoyavlensky V. I. Arctic and the World Ocean: Current state, perspectives and challenges of hydrocarbon production. Scientific Works of the Free Economic Society of Russia, 2014, vol. 182, no. 3, pp. 12—175. (In Russian).

2. Bogoyavlensky V. I. Oil and gas emissions on land and offshore areas of the Arctic and World Ocean. Drilling and oil, 2015, no. 6, pp. 4—9. (In Russian).

3. Bogoyavlensky V. I. Natural and technogenic threats in fossil fuels production in the Earth cryolithosphere. Russ. Min. Ind., 2020, no. 1, pp. 97—118. DOI: 10.30686/1609-9192-2020-1-97-118. (In Russian).

4. Bogoyavlensky V. I., Bogoyavlensky I. V., Kishankov A. V. Geophysical methods of ensuring technological sovereignty and national security of Russia in the Arctic. Bull. of the Russian Academy of Sciences, 2024, vol. 94, no. 10, pp. 896—914. DOI: 10.31857/S0869587324100055. (In Russian).

5. Dzyublo А. D., Ermolaev A. I., Geresh G. M., Perekrestov V. E. Shallow gas influence of on design decisions for the development of gas condensate fields on the shelf of the Arctic and subarctic seas. Arctic: Ecology and Economy, 2024, vol. 14, no. 2, pp. 192—204. DOI: 10.25283/2223-4594-2024-2-192-204. (In Russian).

6. Mironyuk S. G., Semenova A. A. Regional features of distribution of geological hazards on the Barents Sea shelf. Engineering geological problems of present time and methods of their solution. Moscow, 2017, pp. 152—160. (In Russian).

7. Rokos S. I. Engineering geological features of near-surface zones of abnormally high formation pressure on the shelf of the Pechora Sea and the southern part of the Kara Sea. Engineering geology, 2008, no. 4, pp. 22—28. (In Russian).

8. Sokolov S. Yu., Moroz E. A., Zarayskaya Yu. A. et al. Mapping of dangerous geological objects and processes at the Northern and Central parts of the Barents Sea shelf according to the hydroacoustic data from RV “Akademik Nikolai Strakhov”. Arctic: Ecology and Economy, 2023, vol. 13, no. 2, pp. 164—179. DOI: 10.25283/2223-4594-2023-2-164-179. (In Russian).

9. Andreassen K., Nilssen E. G., Ødegaard C. M. Analysis of shallow gas and fluid migration within the Plio-Pleistocene sedimentary succession of the SW Barents Sea continental margin using 3D seismic data. Geo-Marine Letters, 2007, vol. 27, no. 2-4, pp. 155—171.

10. Andreassen K., Hubbard A., Winsborrow M. et al. Massive blow-out craters formed by hydrate-controlled methane expulsion from the Arctic seafloor. Science, 2017, vol. 356, pp. 948—953.

11. Judd A., Hovland M. Seabed Fluid Flow. The Impact on Geology, Biology, and the Marine Environment. New York, USA, Cambridge Univ. Press, 2007, 475 р.

12. Vassoevich N. B. Principal scheme of vertical zoning of generation of hydrocarbon gases and oil. Izvestiya Akad. Nauk SSSR, 1974, no. 5, pp. 17—29. (In Russian).

13. Ginsburg G. D., Soloviev V. A. Submarine gas hydrates. Saint Petersburg, VNIIOkeangeologia, 1994, 199 p. (In Russian).

14. Yakushev V. S. Natural gas and gas hydrates in cryolithozone. Moscow, VNIIGAZ, 2009, 192 p. (In Russian).

15. Bogoyavlensky V., Kishankov A., Kazanin A. Evidence of large-scale absence of frozen ground and gas hydrates in the northern part of the East Siberian Arctic shelf (Laptev and East Siberian seas). Marine and Petroleum Geology, 2023, vol. 148, p. 106050.

16. Bogoyavlensky V., Kishankov A., Yanchevskaya A., Bogoyavlensky I. Forecast of Gas Hydrates Distribution Zones in the Arctic Ocean and Adjacent Offshore Areas. Geosciences, 2018, vol. 8, no. 12, 453, pp. 1—17.

17. Andreassen K., Hart P. E., Grantz A. Seismic studies of a bottom simulating reflection related to gas hydrate beneath the continental margin of the Beaufort Sea. J. of Geophysical Research: Solid Earth, 1995, vol. 100, no. B7, pp. 12659—12673.

18. Shakhova N., Semiletov I., Sergienko V. et al. The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2015, vol. 373, no. 2052, p. 20140451.

19. Anisimov O. A., Borzenkova I. I., Lavrov S. A., Strelchenko Yu. G. Current Dynamics of subsea permafrost and methane emission on the shelf of the Eastern Arctic seas. Ice and Snow, 2012, no. 2, pp. 97—105. (In Russian).

20. Sayedi S. S., Abbott B. W., Thornton B. F. et al. Subsea permafrost carbon stocks and climate change sensitivity estimated by expert assessment. Environmental Research Letters, 2020, vol. 15, no. 12, p. 124075. DOI: 10.1088/1748-9326/abcc29.

21. Bogoyavlensky V. I., Kerimov V. Yu., Olkhovskaya O. O. Dangerous gas-saturated objects in the World Ocean: the Sea of Okhotsk. Neftyanoe khozyaistvo, 2016, no. 6, pp. 43—47. (In Russian).

22. Bogoyavlensky V. I., Kazanin G. S., Kishankov A. V. Dangerous gas-saturated objects in the World Ocean: the Laptev Sea. Drilling and oil, 2018, no. 5, рр. 20—28. (In Russian).

23. Bogoyavlensky V. I., Kishankov A. V. Dangerous gas-saturated objects in the World Ocean: the Bering Sea. Drilling and oil, 2018, no. 9, рр. 4—12. (In Russian).

24. Bogoyavlensky V.  I., Kishankov A. V. Dangerous gas-saturated objects in the World Ocean: the Chukchi Sea (Russia and the USA). Arctic: Ecology and Economy, 2020, no. 2 (38), рр. 45—58. (In Russian).

25. Bogoyavlensky V. I., Kishankov A. V., Kazanin A. G., Kazanin G. A. Dangerous gas-saturated objects in the World Ocean: the East Siberian Sea. Arctic: Ecology and Economy, 2022, vol. 12, no. 2, pp. 158—171. DOI: 10.25283/2223-4594-2022-2-158-171. (In Russian).

26. Bogoyavlensky V. I., Kishankov A. V., Kazanin A. G. Heterogeneities in the Upper Part of the Section of the Sedimentary Cover of the East Siberian Sea: Gas Accumulations and Signs of Ice Gouging. Doklady Earth Sciences, 2022, vol. 505, no. 1, pp. 411—415. DOI: 10.1134/S1028334X22070042.

27. Bogoyavlensky V., Kishankov A., Kazanin A., Kazanin G. Distribution of permafrost and gas hydrates in relation to intensive gas emission in the central part of the Laptev Sea (Russian Arctic). Marine and Petroleum Geology, 2022, vol. 138, p. 105527. Available at: https://doi.org/10.1016/j.marpetgeo.2022.105527 .

28. Bogoyavlensky V.  I., Kishankov A. V. Dangerous gas-saturated objects in the World Ocean: the Beaufort Sea, Alaska North Slope shelf. Arctic: Ecology and Economy, 2023, vol. 13, no. 2, pp. 201—210. DOI: 10.25283/2223-4594-2023-2-201-210. (In Russian).

29. Baranov B. V., Lobkovsky L. I., Dozorova K. A., Tsukanov N. V. The Fault System Controlling Methane Seeps on the Shelf of the Laptev Sea. Doklady Earth Sciences, 2019, vol. 486, pp. 571—574. DOI: 10.1134/S1028334X19050209.

30. Baranov B., Galkin S., Vedenin A., Dozorova K., Gebruk A., Flint M. Methane seeps on the outer shelf of the Laptev Sea: characteristic features, structural control, and benthic fauna. Geo Mar. Lett., 2020, vol. 40 (4), pp. 541—557. Available at: https://doi.org/10.1007/s00367-020-00655-7.

31. Drachev S. S., Malyshev N. A., Nikishin A. M. Tectonic history and petroleum geology of the Russian Arctic Shelves: an overview. Geological society, London, Petroleum geology conference series. London, the Geological Society of London, 2010, vol. 7, no. 1, pp. 591—619.

32. Avetisov G. P. Once again on the earthquakes in the Laptev Sea. Geological-geophysical features of the lithosphere of the Arctic Region. Iss. 3. St. Petersburg, VNIIOkeangeologia, 2000, pp. 104—114. (In Russian).

33. Grantz A., Dinter D. A., Hill E. R. et al. Geologic framework, hydrocarbon potential, and environmental conditions for exploration and development of proposed oil and gas lease sale Sale 85 in the central and northern Chukchi Sea. U.S. Geological Survey Open-File Report 82-1053, 1982, 84 p.

34. Bogoyavlensky V. I., Polyakova I. D., Budagova T. A., Bogoyavlensky I. V., Danilina A. N. Geological and geophysical studies of oil and gas potential of offshore areas of Circumarctic segment of the Earth. Oil and gas geology, 2011, no. 6, pp. 45—58. (In Russian).

35. Andreassen K., Hart P. E., Grantz A. Seismic studies of a bottom simulating reflection related to gas hydrate beneath the continental margin of the Beaufort Sea. J. of Geophysical Research: Solid Earth, 1995, vol. 100, no. B7, pp. 12659—12673.

36. Kvenvolden K. A., Grantz A. Gas hydrates of the Arctic Ocean region. Grantz et al. (Eds). The Arctic Ocean Region (Geol. North Am., L). Colo. Geol. Soc. Am., 1990, pp. 539—549.

37. Paull C. K., Dallimore S. R., Caress D. W. et al. Active mud volcanoes on the continental slope of the Canadian Beaufort Sea. Geochemistry, Geophysics, Geosystems, 2015, vol. 16, no. 9, pp. 3160—3181.

38. Antipov M. P., Bondarenko G. E., Bordovskaya T. O., Shipilov E. V. Tectonic evolution of the Anadyr Basin, northeastern Eurasia, and its petroleum resource potential. Geotectonics, 2009, vol. 43, pp. 399—419. (In Russian).

39. Sakamoto T., Takahashi K., Iijima K. et al. Data report: site surveys in the Bering Sea for Integrated Ocean Drilling Program Expedition 323 (as part of IODP Proposal 477). Proc. IODP, 2011, vol. 323, p. 2.

40. Scholl D. W., Hart P. E. Velocity and amplitude structures on seismic reflection profiles-possible massive gas-hydrate deposits and underlying gas accumulations in the Bering Sea Basin. The future of energy gases, 1993, pp. 331—351.

41. Boyer T. P., Baranova O. K., Coleman C. et al. NOAA Atlas NESDIS 87. World Ocean Database, 2018.

42. Bogoyavlensky V. I., Bogoyavlensky I .V., Bogoyavlenskaya O. V., Nikonov R. A. Prospects for oil and gas content of sedimentary basins and the basement of the Circum-Arctic region. Geology of Oil and Gas, 2017, no. 5, pp. 5—20.

43. Stupakova A. V., Bordunov S. I., Sautkin R. S. et al. Oil and gas bearing basins of the Russian Arctic. Oil and gas geology, 2013, no. 3, pp. 30—47. (In Russian).

44. Boogaard M., Hoetz G. Seismic characterisation of shallow gas in the Netherlands. Abstract FORCE Seminar Stavanger 8—9 April 2015. [S. l.], 2015.