Numerical modeling of the influence of heat exchange of reservoir beds with enclosing rocks on gas production from a single well
V.E. Nikolaev, G.I. Ivanov, I.I. Rozhin
Keywords: mathematical modeling, non-isothermal filtration, real gas, finite difference methods
Abstract
In the computational experiment, the influence of heat exchange through top and bottom of the gas-bearing reservoir on the dynamics of temperature and pressure fields in the process of real gas production from a single well is investigated. The experiment was carried out with a modified mathematical model of non-isothermal gas filtration, obtained from the energy and mass conservation laws and the Darcy law. The physical and caloric equations of state together with the Newton-Rihman law of heat exchange of a gas reservoir with surrounding enclosing rocks are used as closing relations. It is shown that the influence of the heat exchange with environment on the temperature field of a gas-bearing reservoir is localized in a narrow zone near its top and bottom, though the size of this zone increases with time.
|
