In connection with the depletion of the largest land deposits, the practical interest is growing related to the development of both traditional gas resources of the Arctic continental shelf and non-traditional (gas hydrates) in Japan, USA, China, and South Korea.
The Arctic shelf is characterized by various engineering and geological processes and phenomena that can significantly complicate conducting works on the development of oil and gas fields. Among hazards, the special place is held by accumulations of shallow gas and gas hydrates in the upper part of the geological section.
Gas hydrates are considered the promising source of hydrocarbon energy in the twenty-first century. Therefore, the prediction of complications during opening and development of deep-sea gas hydrate deposits is rather actual.
International statistics on accidents at the facilities associated with the presence of shallow gas shows that in some cases occurred serious damages to drilling equipment, and, sometimes, death of the platform.
Drilling exploration and production wells in the intervals containing gas hydrates is also accompanied by increased gas shows, which subsequently can lead to complications and accidents.
When selecting the location of platform installation for drilling wells, it is required to consider the probability of presence of gas-saturated precipitation, since shallow gas in the soil leads to a decrease in its strength. Subsequently, this can create the situation of critical movements of the platforms and various emergency situations associated with this.
To assess the influence of the studied natural and technogenic hazards when drilling wells and developing the offshore fields, the risk register was created indicating the hazard level. It is established that when drilling the offshore wells with the use of self-elevating and floating drilling rigs, the risks have different level, in some cases unacceptable. Therefore, when planning the offshore drilling, it is necessary to carry out the complex of organizational and technical measures on risks minimization in accordance with the international rules and regulations for safe work.
- Melnikov P.N., Skvortsov M.B., Kravchenko M.N., Agadzhanyants I.G., Grushevskaya O.V., Uvarova I.V. The results of geological exploration on the Russian Arctic shelf in 2014–2019 and prospects for future development. Geologiya Nefti i Gaza = Oil and Gas Geology. 2019. № 6. pp. 5–18. (In Russ.). DOI: 10.31087/0016 7894 2019 6 5 18
- Dzyublo A.D., Voronova V.V., Perekrestov V.E. Research Shallow Gas of Sakhalin Shelf and Minimize Risks During Offshore Wells Construction. Vestnik Assotsiatsii burovykh podryadchikov = Bulletin of the Association of Drilling Contractors. 2019. № 3. pp. 20–25. (In Russ.).
- Dzyublo A.D., Voronova V.V. Investigation of the Mechanisms of Occurrence of Hazardous Natural Phenomena during the Development of Oil and Gas Fields on the Shelf of the Arctic and Subarctic Seas. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. 2019. № 4. pp. 69–77. (In Russ.). DOI: 10.24000/0409-2961-2019-4-69-77
- Nuriev M.F., Shevelev M.B., Semenov Yu.V., Ershov N.A., Liskovy P.N. Geological conditions of the upper part deposits at the northeast shelf fields of the Sea of Okhotsk. Gazovaya promyshlennost = Gas Industry. 2019. № 8. pp. 56–65. (In Russ.).
- Bogoyavlensky V.I. Oil and gas emissions on land and offshore areas of the Arctic and World oceans. Burenie i neft = Drilling and oil. 2015. № 6. pp. 4–10. (In Russ.).
- Rokos S.I. Gas-saturated deposits of the upper part of the Barents-Kara shelf section: thesis … Сandidate of Geographical Sciences. Murmansk, 2009. 21 p. (In Russ.).
- Mironyuk S.G. The effects of sudden gas emissions from the bottom sediments and their hazard for offshore structures and drilling vessels. Available at: http://samlib.ru/m/mironjuk_s_g/06geohazards.shtml (accessed: February 25, 2020). (In Russ.).
- Kharchenko Yu.A., Gritsenko A.I., Atayan G.E., Dzhantemirov M.R. Ensuring the Integrated Safety of Floating Marine Oil-and-Gas Platforms (Complexes) of the Naval Type. Vestnik Assotsiatsii burovykh podryadchikov = Bulletin of the Association of Drilling Contractors. 2019. № 3. pp. 14–19. (In Russ.).
- Laptev B.V. Gas-Hydrates and their Possible Role in the Natural Gas-Dynamic Events. Bezopasnost truda v promyshlennosti = Occupational Safety in Industry. 2015. № 11. pp. 42–45. (In Russ.).
- Fu Qiang, Zhou Shouwei, Li Qingping. Natural Gas Hydrate Exploration and Production Technology Research Status and Development Strategy. Engineering Sciences. 2015 № 17 (9). pp. 123–132. DOI: 10.3969/j.issn.1009-1742.2015.09.020
- Sun Baojiang, Zhang Zhenan. Challenges and Countermeasures for the Drilling and Completion of Deepwater Wells in the South China Sea. Petroleum Drilling Techniques. 2015. № 43 (4). pp. 1–7. DOI: 10.11911/syztjs.201504001
- Li X., Xu C., Zhang Y., Ruan X., Li G., Wang Y. Investigation into gas production from natural gas hydrate: A review. Applied Energy. 2016. № 172. pp. 286–322. DOI: 10.1016/j.apenergy.2016.03.101
- Qiu K., Yamamoto K., Birchwood A, Chen Y. Well-Integrity Evaluation for Methane-Hydrate Production in the Deepwater Nankai Trough. SPE Drilling & Completion. 2015. 30 (1). pp. 52–67.
- Xiang Hua. Development of the technological solutions for predicting complications in the operation of deep-sea gas hydrate deposits: thesis … Сandidate of Technical Sciences. Moscow, 2019. 23 p. (In Russ.).
- Methodological foundations for conducting hazard analysis and risk assessment of accidents at hazardous production facilities: Safety guide. Ser. 27. Iss. 8. Moscow: ZAO NTTs PB, 2016. 56 p. (In Russ.).