Investigation of the influence of various parameters on the temperature field of the barothermal effect in a gas-condensate formation


Аuthors

Boudjoghra S. , Sharafutdinov R. F., Kanafin I. V.*

Ufa University of Science and Technology, 32, Zaki Walidi str., Ufa, 450076, Russia

*e-mail: vradlik@gmail.com

Abstract

Thermohydrodynamic properties of gas condensate mixture significantly affect the behavior of non-isothermal flow in the reservoir. The features of formation of temperature field in the reservoir with variation of mass concentration of condensate in the gas phase, heat of condensation, Joule-Thomson coefficient of gas and viscosity of phases are considered.
The relevance of these studies of temperature fields taking into account thermodynamic effects and heat of condensation is associated with the use of well temperature logging in monitoring the development of gas condensate reservoirs. The importance of these studies is also related to the fact that recently more and more attention has been paid to the issues of transition from qualitative to quantitative interpretation of well temperature logging data, especially with multiphase flows and phase transformations, ambiguities may arise in the interpretation of production data. It is of interest to study the influence of thermohydrodynamic parameters on the formation of the temperature field in a gas condensate reservoir during gas condensate filtration taking into account thermodynamic effects and condensation heat. For this purpose, a mathematical model of non-isothermal gas condensate filtration is used taking into account thermodynamic effects and condensation heat. In this case, modeling non-isothermal filtration of gas condensate taking into account thermodynamic effects involves taking into account changes in temperature and pressure when gas condensate passes through a porous medium. This includes taking into account phase behavior and such properties as condensation and evaporation, as well as their influence on flow behavior. The temperature and composition of the gas condensate significantly affect the phase equilibrium and flow behavior. Changes in temperature can change the phase state, and changes in fluid composition can lead to different phase equilibria.
It is shown that variation of condensate viscosity, Joule-Thomson coefficient of gas, condensate concentration and heat of condensation lead to change of both gas flow rate from the reservoir and time of stabilization of gas flow rate and temperature at the outlet of the reservoir. In this case, changes in temperature anomalies can be observed in the direction of both a decrease in temperature and an increase, depending on the values characterizing the state of the gas condensate mixture.

Keywords:

gas-condensate reservoir, Joule-Thomson effect, adiabatic effect, Henry's law, heat of condensation

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