Home – Home – Jornals – Russian Geology and Geophysics 2018 number Неопубликованное

The paper presents the results of experimental studies of the thermal field in the nonoperating well (without movement of liquid in the casing) in relation to the determination of the column flow upward (movement of liquid in the behind-the-casing flow from the lower to the upper formation) by the method of active thermometry. The research was carried out on a physical model of the well, which is a vertically positioned steel pipe, to which a system of copper tubes is attached from the outside, modeling the channel of the backflow. The pipe contains a local heating section, above which a temperature sonde is located to register a thermal disturbance from the heating section. The effect of natural thermal convection in a liquid on the temperature field in a pipe during and after heating is stopped has been studied. The fact of the presence of high-frequency temperature fluctuations on sensors registering the temperature of the inner surface (wall) of the pipe and liquid above the heating site has been established. The magnitude of temperature fluctuations reaches more than 2 degrees Celsius and decreases with increasing distance to the heating section. An empirical relationship has been obtained linking the arrival time of the front of the temperature disturbance associated with natural thermal convection and the distance to the heating section of the pipe. The curves of the azimuthal temperature distribution on the inner wall of the pipe above the heating section are constructed in the absence and presence of a behind-the-casing flow. Qualitative criteria have been obtained indicating the presence of azimuthally localized behind-the casing flow (sector overflow) of liquid based on the analysis of the azimuthal temperature distribution..