Abstract
In this paper, for the problem of pumping heat-transfer agent into an oil reservoir, a mathematical model of the processes occurring during the movement of a hot steam-water mixture in an injection well has been proposed. This model takes into account phase transitions occurring in a two-phase mixture “water-steam”, and external heat exchange of the well with surrounding rock (including permafrost). Algorithm has been constructed that allows calculating for different time moments of the well operation: the heat-transfer agent parameters, the temperature distribution in the surrounding rock and the thawing radius of permafrost along the depth of the injection well. According to the proposed algorithm, a computer code was developed and numerical experiments were carried out to find the parameters of the downward flow of a hot steam-water mixture in an injection well. By calculation it is shown that using of heat-insulated pipes leads to a lesser heat loses of a heat-transfer agent along the depth of an injection well. Also, using of heat-isolating materials on the outer surface of the well lifting column allows to increase the depth and quantity of steam (compared with non-heat-insulated lifting column). It is shown that with an increase in the heat insulating layer, the thawing radius of permafrost decreases, which is caused by a decrease in heat transfer from the well product to surrounding rocks.
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The research was supported by the Russian Science Foundation (project number 18-19-00049).
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Musakaev, N., Borodin, S., Rodionov, S., Schesnyak, E. (2020). Mathematical Modeling of the Hot Steam-Water Mixture Flow in an Injection Well. In: Zamojski, W., Mazurkiewicz, J., Sugier, J., Walkowiak, T., Kacprzyk, J. (eds) Engineering in Dependability of Computer Systems and Networks. DepCoS-RELCOMEX 2019. Advances in Intelligent Systems and Computing, vol 987. Springer, Cham. https://doi.org/10.1007/978-3-030-19501-4_34
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DOI: https://doi.org/10.1007/978-3-030-19501-4_34
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