Modeling of natural gas hydrates formation during joint operation of a reservoir and a gas well

The process of formation and deposition of gas hydrates on the walls of a well during its joint operation with reservoir and heat exchange with the environment is modeled. The problem is reduced to solving differential equations describing a non- isothermal flow of an imperfect gas both in a porous...

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Bibliographic Details
Main Authors: Rozhin, Igor I., Ivanov, Gavril I.
Format: Conference Proceeding
Language:English
Subjects:
Differential equations
Gas hydrates
Gas pressure
Gas wells
Heat exchange
Isothermal flow
Natural gas
Porous media
Reservoir operation
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Summary:The process of formation and deposition of gas hydrates on the walls of a well during its joint operation with reservoir and heat exchange with the environment is modeled. The problem is reduced to solving differential equations describing a non- isothermal flow of an imperfect gas both in a porous medium and in a well, heat propagation in rocks with appropriate coupling conditions. It is shown that for wells with a reservoir temperature significantly exceeding the equilibrium temperature of hydrate formation, at constant values of gas pressure and temperature at the bottom of the well, the hydrate plug formation time is signif- icantly overestimated, in contrast to the case when the reservoir pressure and temperature change over time. For the wells with reservoir temperature approximately equal to the hydrate formation temperature, the time of complete plugging will be slightly longer when the model takes into account the change in temperature and gas pressure at the bottom of the well during the gas extraction process.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0106587