Abstract. The engineering and geophysical studies are carried out before installation of a drilling platform and construction of engineering structures in the water areas in order to identify and map geological hazards, including the anomalous gas zones, from which involuntary release of hydrocarbons is possible, when the drill string passes through in the upper part of the geological section. The paper presents the results of expeditionary studies carried out at the site of engineering and geological surveys using continuous seismoacoustic profiling. The site is in the Sea of Okhotsk at the northeastern shelf of Sakhalin Island and adjoins Nogliksky district of the Sakhalin Region. Two seismoacoustic complexes were identified according to the data of continuous seismoacoustic profiling in the section of the study area, which differ from each other in the nature of the wave pattern. Gas zones and paleo-incisions were found in the bottom part of the section. The identified geological hazards are mapped and must be taken into account during further drilling of wells and construction of engineering structures.

For citation: Leksin V.K. Paleo-incisions and gas zones of Pliocene-Quaternary sediments at the site of engineering and geological surveys on the shelf of Sakhalin Island. Geosistemy perehodnykh zon = Geosystems of Transition Zones, 2021, vol. 5, no. 4, pp. 320–327. (In Russ., abstr. in Engl.).
https://doi.org/10.30730/gtrz.2021.5.4.320-327

Для цитирования: Лексин В.К. Палеоврезы и газовые зоны плиоцен-четвертичных отложений на площадке инженерно-геологических изысканий на шельфе острова Сахалин. Геосистемы переходных зон, 2021, т. 5, № 4, с. 320–327.
https://doi.org/10.30730/gtrz.2021.5.4.320-327

1. Akulichev V.A., Obzhirov A.I., Shakirov R.B., Maltseva E.V., Gresov A.I., Telegin Yu.A. 2014. Conditions of gas hydrate formation in the Sea of Okhotsk. Doklady Earth Sciences, 454(1): 94–96. https://doi.org/10.1134/s1028334x14010164

2. Bogoyavlensky V.I., Kerimov V.Yu., Olkhovskaya O.O., Mustaev R.N. 2016. Improving the efficiency and safety prospecting, exploration and development of oil and gas in the Sea of Okhotsk. Territoriya Neftegaz [Oil and Gas Territory], 10: 24–32. (In Russ.).

3. Veselov О.V., Gordienko V.V., Kudelkin V.V. 2006. [Thermobaric conditions for the formation of gas hydrates in the Sea of Okhotsk]. Geology and Mineral Resources of World Ocean, 4: 42–65. (In Russ.).

4. Gavrilov A.A. 2009. The role of faults in the formation of the coastlines of the Okhotsk Sea and Sea of Japan (paper 1. Regional aspect of studies). Geomorfologiya, 3: 38–49. (In Russ.). https://doi.org/10.15356/0435-4281-2009-3-38-49

5. Gaynanov V.G. 2008. On the nature of bright spots on time sections of seismoacoustic profiling. GEOsection, 2: 1–18. (In Russ.).

6. Golubin S.I., Saveliev K.N., Novikov A.N. 2019. [Estimation of geological hazards in the operational monitoring of offshore fields of Sakhalin Island]. Gazovaya promyshlennost’ = Gas Industry Magazine, S1(782): 30–35. (In Russ.).

7. Dzyublo A.D., Voronova V.V., Perekrestov V.E. 2019. [Research shallow gas of Sakhalin shelf and minimize risks during offshore wells construction]. Vestnik Assotsiatsii burovykh podryadchikov = Bull. of the Association of Drilling Contractors, 3: 20–25. (In Russ.).

8. Ivanov G.I., Kazanin A.G., Sarkisyan M.V., Lantsev V.V., Nekrylov N.T., Ionov V.Yu., Pavlov S.P., Makarov E.S. 2016. [High-resolution seismics – a new step forward in the study of geological hazards]. Neft’. Gaz. Novatsii. [Oil. Gas. Innovations], 1: 65–68. (In Russ.).

9. Kazanin A.G., Kazanin G.S., Ivanov G.I., Sarkisyan M.V. 2016. Innovative technologies in performing engineering and geological works on the Arctic shelf of Russia. Scientific J. of the Russian Gas Society, 4: 25–30. (In Russ.).

10. Kalinin A.V. 1965. [Equipment and methods of seismoacoustic exploration for engineering and geological offshore surveys]: [extended abstract of diss. … cand. of Phys. and Math. sciences]. Moscow: Moscow State University. (In Russ.).

11. Kalinin A.V., Kalinin V.V., Pivovarov B.L. 1983. [Seismoacoustic studies in water areas]. Moscow: Nedra, 204 p. (In Russ.).

12. Kerimov V.Y., Sizikov E.A., Sinyavskaya O.S., Makarova A.Y. 2015. The conditions of the formation and the searching of hydrocarbon deposits in the turbidite reservoirs on the Okhotsk offshore. Neft’, gaz i biznes [Oil, Gas and Business], 2: 32–37. (In Russ.).

13. Leksin V.K. 2020. Application of high resolution seismic to search for local gas anomalies in the South Kirinskoye oil and gas condensate field. Geosistemy perehodnykh zon = Geosystems of Transition Zones, 4(4): 384–392. https://doi.org/10.30730/gtrz.2020.4.4.384-392

14. Leksin V.K., Samarin V.I., Liskovyi P.N. 2018. Results of interpretation of seismic during engineering surveys within of the South-Kirinskoye oil and gas condensate field (shelf of Sakhalin Island). Inzhenernye izyskaniya = Engineering Survey, 12(9–10): 64–73. (In Russ.).

15. Mironyuk S.G., Markaryan V.V., Shelting S.K. 2013. Experience of integrated assessment and large-scale engineering-geological zoning of the north-eastern shelf of the Black Sea on geohazards for construction of linear objects. Inzhenernye izyskaniya = Engineering Survey, 13: 48–59. (In Russ.).

16. Mironyuk S.G., Roslyakov A.G., Semenova A.A., Sharipov M.S. 2017. Using high-resolution seismics for identification of geological hazards in various geomorphological zones of the Black Sea. Inzhenernye izyskaniya = Engineering Survey, 1: 54–60. (In Russ.).

17. Novikov A.A. 2018. Specifics of the integrated offshore geotechnical investigations and estimation of geological hazards for objects of the subsea production system of the offshore fields of Kirinsky block of Sakhalin Island. Gazovaya promyshlennost’ = Gas Industry Magazine, 9: 42–48. (In Russ.).

18. Petrenko V.E., Oganov G.S., Sviridova T.A. 2017. Shallow gas: risks and variants of technical-technological solutions when projecting construction of offshore wells. Oborudovanie i tekhnologii dlya neftegazovogo kompleksa = Equipment and Technologies for Oil and Gas Complex, 2: 21–27. (In Russ.).

19. Pivovarov B.L. 1970. [Investigation of dynamic and kinematic characteristics of elastic waves in absorbing media in relation to the problems of seismic acoustics]: [extended abstract of diss. … cand. of Geol. and Miner sciences]. Moscow: Moscow State University. (In Russ.).

20. Rybalchenko V.V., Gogonenkov G.N., Slepchenko V.A. 2017. Vertical gas migration and gas hydrates in the northeast shelf of Sakhalin. Oil and Gas Geology, 2: 38–51. (In Russ.).

21. Hilterman F.J. 2010. Interpretation of amplitudes in seismic exploration. Tver: Publ. House of the GERS, 256 p. (In Russ.). (Transl. from: Hilterman F.J. 2001. Seismic amplitude interpretation. Society of Exploration Geophysicists, 236 p.).

22. Cox D.R., Huuse M., Newton A.M.W., Sarkar A.D., Knutz P.C. 2021. Shallow gas and gas hydrate occurrences on the northwest Greenland shelf margin. Marine Geology, 432(1): 106382. https://doi.org/10.1016/j.margeo.2020.106382

23. Games K.P. 2012. Shallow gas detection. Why HRS, why 3D, why not HRS 3D? First Break, 30(10): 67–75.

24. Games K.P., Self E. 2017. HRS 3D data – a fundamental change in site survey geohazard interpretation. First Break, 35(3): 39–48.