Seasonal variability of strength properties of ice formations on the Russian continental shelf

UDK: 622.276.1/.4.04
DOI: 10.24887/0028-2448-2021-8-63-67
Key words: ice, strength, ice loads, offshore, Arctic
Authors: А.А. Pashali (Rosneft Oil Company, RF, Moscow), K.A. Kornishin (Rosneft Oil Company, RF, Moscow), Ya.O. Efimov (Scientific Arctic Centre LLC, RF, Moscow), P.А. Tarasov (Scientific Arctic Centre LLC, RF, Moscow), Т.E. Mamedov (Scientific Arctic Centre LLC, RF, Moscow), А.Т. Bekker (Far Eastern Federal University, RF, Vladivostok), Е.Е. Pomnikov (Far Eastern Federal University, RF, Vladivostok), R.B. Guzenko (Arctic and Antarctic Research Institute, RF, Saint-Petersburg), S.M. Kovalev (Arctic and Antarctic Research Institute, RF, Saint-Petersburg)

The article provides information and discusses results of the year-round observations of the strength properties of flat and deformed ice at the research site in the Khatanga Bay (Laptev Sea). Field work was carried out by the Far Eastern Federal University and Arctic and Antarctic Research Institute in 2019-2020 as part of the Rosneft's research program. Obtained results significantly expanded understanding of the seasonal changes of the strength characteristics of deformed sea ice (hummocks and stamukhas), and also made it possible to determine temperature and strength distribution within the boundaries of an ice formation, that is fundamentally important for assessing its impact on engineering structures. One of the important conclusions is that the ridge sail acts as heat isolation - ice in the keel of the ridge under sail is significantly warmer than ice in the keel outside the sail area. Period when hummocks and stamukhas pose the maximum threat to offshore structures is also determined. These results can be used during design and operations of infrastructure facilities for exploration, production and transportation of hydrocarbons in ice waters of the Russian continental shelf, as well as for conceptual research of marine logistics issues related to the transportation of hydrocarbons along the Northern Sea Route. Adequate thermal and strength models of ice formations are very important for correct implementation of numerical and basin modeling and assessment of ice loads on offshore oil and gas field structures.

References

1. Pashali A.A., Kornishin K.A., Tarasov P.A. et al., Ice and hydrometeorological survey at Khatangskiy license block in the Laptev Sea (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 3, pp. 22–27, DOI: 10.24887/0028-2448-2018-3-22-27

2. Guzenko R.B., Mironov Y.U., May R.I. et al., Morphometry and internal structure of ice ridges in the Kara and Laptev Seas, International Journal of Offshore and Polar Engineering, 2020, V. 30, no.2, pp. 194–201.

3. Pashali A.A., Kornishin K.A., Tarasov P.A. et al., Special aspects of ice strength seasonal variability in Russian Arctic (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2020, no. 11, pp. 51–56, DOI: 10.24887/0028-2448-2020-11-51-55

4. Kovalev S.M., Smirnov V.N., Borodkin V.A. et al., Physical and Mechanical Characteristics of Sea Ice in the Kara and Laptev Seas, International Journal of Offshore and Polar Engineering, 2019, V. 29, no. 4, pp. 369–374.

5. Pavlov V.A., Kornishin K.A., Mironov E.U. et al., Peculiarities of consolidated layer growth of the Kara and Laptev Sea ice ridges (In Russ.),  Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 49–54.

6. Mironov Y.U., Guzenko R.B., Porubaev V.S. et al., Morphometric Parameters of Stamukhas in the Laptev Sea, International Journal of Offshore and Polar Engineering, 2019, V. 29, no. 4, pp. 383–390, DOI:10.17736/ijope.2019.jc771.

7. Kornishin K.A., Tarasov P.A., Efimov Ya.O. et al., Development of corporative Ice Management System for Arctic license blocks (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2017, no. 11, pp. 48-51, DOI: 10.24887/0028-2448-2017-11-48-51

8. Pavlov V.A., Kornishin K.A., Tarasov P.A. et al., Experience in Monitoring and Sizing Up of Icebergs and Ice Features in the South-Western Part of Kara Sea During 2012-2017 (In Russ.),  Neftyanoe khozyaystvo = Oil Industry, 2018, no. 12, pp. 82–87, DOI: 10.24887/0028-2448-2018-12-82-87

9. Buzin I.V., Nesterov A.V., Gudoshniko Y.P. et al., The Preliminary Results of Iceberg Drift Studies in the Russian Arctic Throughout 2012–2017, International Journal of Offshore and Polar Engineering, 2019, V. 29, no. 4, pp. 391–399.

The article provides information and discusses results of the year-round observations of the strength properties of flat and deformed ice at the research site in the Khatanga Bay (Laptev Sea). Field work was carried out by the Far Eastern Federal University and Arctic and Antarctic Research Institute in 2019-2020 as part of the Rosneft's research program. Obtained results significantly expanded understanding of the seasonal changes of the strength characteristics of deformed sea ice (hummocks and stamukhas), and also made it possible to determine temperature and strength distribution within the boundaries of an ice formation, that is fundamentally important for assessing its impact on engineering structures. One of the important conclusions is that the ridge sail acts as heat isolation - ice in the keel of the ridge under sail is significantly warmer than ice in the keel outside the sail area. Period when hummocks and stamukhas pose the maximum threat to offshore structures is also determined. These results can be used during design and operations of infrastructure facilities for exploration, production and transportation of hydrocarbons in ice waters of the Russian continental shelf, as well as for conceptual research of marine logistics issues related to the transportation of hydrocarbons along the Northern Sea Route. Adequate thermal and strength models of ice formations are very important for correct implementation of numerical and basin modeling and assessment of ice loads on offshore oil and gas field structures.

References

1. Pashali A.A., Kornishin K.A., Tarasov P.A. et al., Ice and hydrometeorological survey at Khatangskiy license block in the Laptev Sea (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 3, pp. 22–27, DOI: 10.24887/0028-2448-2018-3-22-27

2. Guzenko R.B., Mironov Y.U., May R.I. et al., Morphometry and internal structure of ice ridges in the Kara and Laptev Seas, International Journal of Offshore and Polar Engineering, 2020, V. 30, no.2, pp. 194–201.

3. Pashali A.A., Kornishin K.A., Tarasov P.A. et al., Special aspects of ice strength seasonal variability in Russian Arctic (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2020, no. 11, pp. 51–56, DOI: 10.24887/0028-2448-2020-11-51-55

4. Kovalev S.M., Smirnov V.N., Borodkin V.A. et al., Physical and Mechanical Characteristics of Sea Ice in the Kara and Laptev Seas, International Journal of Offshore and Polar Engineering, 2019, V. 29, no. 4, pp. 369–374.

5. Pavlov V.A., Kornishin K.A., Mironov E.U. et al., Peculiarities of consolidated layer growth of the Kara and Laptev Sea ice ridges (In Russ.),  Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 49–54.

6. Mironov Y.U., Guzenko R.B., Porubaev V.S. et al., Morphometric Parameters of Stamukhas in the Laptev Sea, International Journal of Offshore and Polar Engineering, 2019, V. 29, no. 4, pp. 383–390, DOI:10.17736/ijope.2019.jc771.

7. Kornishin K.A., Tarasov P.A., Efimov Ya.O. et al., Development of corporative Ice Management System for Arctic license blocks (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2017, no. 11, pp. 48-51, DOI: 10.24887/0028-2448-2017-11-48-51

8. Pavlov V.A., Kornishin K.A., Tarasov P.A. et al., Experience in Monitoring and Sizing Up of Icebergs and Ice Features in the South-Western Part of Kara Sea During 2012-2017 (In Russ.),  Neftyanoe khozyaystvo = Oil Industry, 2018, no. 12, pp. 82–87, DOI: 10.24887/0028-2448-2018-12-82-87

9. Buzin I.V., Nesterov A.V., Gudoshniko Y.P. et al., The Preliminary Results of Iceberg Drift Studies in the Russian Arctic Throughout 2012–2017, International Journal of Offshore and Polar Engineering, 2019, V. 29, no. 4, pp. 391–399.


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