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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Implementation of numerical modeling algorithms to examine the filtration of multiphase flow through the gas hydrate stability zone in the Ross Seaстатья
- Авторы: Alekseeva Natalia, Popov Sergey, Poveshchenko Yury, Podryga Viktoriia, Kazakevich Grigory, Chuvilin Evgeny, Coffin Richard
- Журнал: Environmental Research Communications
- Год издания: 2025
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- DOI: 10.1088/2515-7620/adb240
- Аннотация: In the Ross Sea region (Antarctica), evidence of warming, ice melt, and high levels of thermogenic gas hydrates indicate that deep-seated hydrocarbons significantly contribute to carbon cycles in the region. A fluid dynamics filtration model has been developed to describe the movement of liquid and gas in a porous medium containing gas hydrate inclusions, while considering phase transitions. The study investigates structural changes in the gas hydrate stability zone as methane moves from the hydrate-melt zone to the seabed. This is achieved through algorithms based on balances of gas and water masses, and total energy while considering Darcy's law. A numerical fluid dynamics model is employed to study the potential introduction of deep-seated carbon to the Ross Sea ice shelf region for the first time, considering a gas hydrate stability zone under local thermodynamic equilibrium. The calculation results support the phenomenon of free gas from deep sediments migrating to a shallow zone with gas hydrate stability conditions, partially converting into hydrate, while the remaining gas is capable of migrating higher into the water column. The process is accompanied by the formation of a three-phase (gas, hydrate, H2O) hydrate-equilibrium zone, replacing the initially two-phase (hydrate, H2O) gas hydrate stability zone. The modeling results explain the discrepancy between the radiocarbon dating of the core and the study of the history of the ice sheet in the region.
- Добавил в систему: Чувилин Евгений Михайлович