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Open AccessArticle

Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate

1
Department of Applied Informatics and Programming, Sterlitamak Branch of Bashkir State University, 453100 Sterlitamak, Russia
2
Mavlutov Institute of Mechanics of UFRC RAS, 450054 Ufa, Russia
3
Tyumen Branch of Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, 625026 Tyumen, Russia
4
Department of Development and Exploitation of Oil and Gas Fields, Industrial University of Tyumen, 625000 Tyumen, Russia
*
Author to whom correspondence should be addressed.
Energies 2020, 13(2), 440; https://doi.org/10.3390/en13020440
Received: 11 December 2019 / Revised: 10 January 2020 / Accepted: 14 January 2020 / Published: 16 January 2020
In this paper, the process of methane replacement in gas hydrate with carbon dioxide during CO2 injection into a porous medium is studied. A model that takes into account both the heat and mass transfer in a porous medium and the diffusion kinetics of the replacement process is constructed. The influences of the diffusion coefficient, the permeability and extent of a reservoir on the time of full gas replacement in the hydrate are analyzed. It was established that at high values of the diffusion coefficient in hydrate, low values of the reservoir permeability, and with the growth of the reservoir length, the process of the CH4-CO2 replacement in CH4 hydrate will take place in the frontal regime and be limited, generally, by the filtration mass transfer. Otherwise, the replacement will limited by the diffusion of gas in the hydrate. View Full-Text
Keywords: gas hydrates; carbon dioxide; replacement CH4-CO2; porous medium; diffusion gas hydrates; carbon dioxide; replacement CH4-CO2; porous medium; diffusion
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Khasanov, M.K.; Rafikova, G.R.; Musakaev, N.G. Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate. Energies 2020, 13, 440.

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