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Article

Simulating Thermal Interaction of Gas Production Wells with Relict Gas Hydrate-Bearing Permafrost

1
Skolkovo Innovation Center, Skolkovo Institute of Science and Technology, 30, Build. 1, Bolshoi Boulevard, 121205 Moscow, Russia
2
Sergeev Institute of Environmental Geoscience, Russian Academy of Sciences, 109004 Moscow, Russia
3
TotalEnergies Research and Development, 7, Lesnaya St., 125196 Moscow, Russia
*
Author to whom correspondence should be addressed.
Academic Editors: Vitor Magalhães and Jesus Martinez-Frias
Geosciences 2022, 12(3), 115; https://doi.org/10.3390/geosciences12030115
Received: 4 February 2022 / Revised: 22 February 2022 / Accepted: 27 February 2022 / Published: 2 March 2022
(This article belongs to the Special Issue Permafrost and Gas Hydrate Response to Ground Temperature Rising)
The thermal interaction of a gas production well with ice-rich permafrost that bears relict gas hydrates is simulated in Ansys Fluent using the enthalpy formulation of the Stefan problem. The model admits phase changes of pore ice and hydrate (ice melting and gas hydrate dissociation) upon permafrost thawing. The solution is derived from the energy conservation within the modeling domain by solving a quasilinear thermal conductivity equation. The calculations are determined for a well completion with three casing strings and the heat insulation of a gas lifting pipe down to a depth of 55 m. The thermal parameters of permafrost are selected according to laboratory and field measurements from the Bovanenkovo gas-condensate field in the Yamal Peninsula. The modeling results refer to the Bovanenkovo field area and include the size of the thawing zone around wells, with regard to free methane release as a result of gas hydrate dissociation in degrading permafrost. The radius of thawing around a gas well with noninsulated lifting pipes operating for 30 years may reach 10 m or more, while in the case of insulated lifting pipes, no thawing is expected. As predicted by the modeling for the Bovanenkovo field, methane emission upon the dissociation of gas hydrates caused by permafrost thawing around producing gas wells may reach 400,000–500,000 m3 over 30 years. View Full-Text
Keywords: permafrost; Yamal Peninsula; gas production well; thermal modeling; thawing radius; vacuum heat insulation; gas hydrate; gas hydrate dissociation; methane emission permafrost; Yamal Peninsula; gas production well; thermal modeling; thawing radius; vacuum heat insulation; gas hydrate; gas hydrate dissociation; methane emission
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MDPI and ACS Style

Chuvilin, E.; Tipenko, G.; Bukhanov, B.; Istomin, V.; Pissarenko, D. Simulating Thermal Interaction of Gas Production Wells with Relict Gas Hydrate-Bearing Permafrost. Geosciences 2022, 12, 115. https://doi.org/10.3390/geosciences12030115

AMA Style

Chuvilin E, Tipenko G, Bukhanov B, Istomin V, Pissarenko D. Simulating Thermal Interaction of Gas Production Wells with Relict Gas Hydrate-Bearing Permafrost. Geosciences. 2022; 12(3):115. https://doi.org/10.3390/geosciences12030115

Chicago/Turabian Style

Chuvilin, Evgeny, Gennadiy Tipenko, Boris Bukhanov, Vladimir Istomin, and Dimitri Pissarenko. 2022. "Simulating Thermal Interaction of Gas Production Wells with Relict Gas Hydrate-Bearing Permafrost" Geosciences 12, no. 3: 115. https://doi.org/10.3390/geosciences12030115

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