DETERMINATION OF THERMOPHYSICAL PROPERTIES OF ROCKS USING WELLS

• Datum: 2023
• 1. Verfasser: Morozov, Y.
• Format: Artikel
• Sprache: Ukrainisch
• Veröffentlicht: Institute of Renewable Energy National Academy of Sciences of Ukraine 2023
• Schlagworte: well; thermal conductivity coefficient; thermal diffusivity coefficient; rock mass; temperature difference; the inverse problem of thermal conductivity.
• Online Zugang: https://ve.org.ua/index.php/journal/article/view/418
• Назва журналу: Vidnovluvana energetika

The determination of the thermophysical properties of rocks, namely thermal conductivity, thermal diffusivity and heat capacity by laboratory methods, is associated with significant errors associated with the violation of the natural conditions of rocks in the process of sampling, transportation and storage of samples. Moisture saturation, physical and mechanical properties and structure of cores change the most. It is almost impossible to reproduce simultaneously the influence of all reservoir factors on the thermal properties of rocks under laboratory conditions. In addition, it is necessary to be sure that the cores are taken through a certain interval of glybins, and therefore the characteristic of the thermophysical authorities of the opened geological analysis is not completely clear, therefore, the values of the thermophysical authorities of the underground horizons can be iv. An analytical solution to the problem of heat exchange between a rock mass and a liquid filling a cylindrical well has been obtained. Based on the solution of this problem, a dependence was obtained that allows one to calculate the coefficient of thermal conductivity and thermal diffusivity of a rock mass from the temperature difference between the massif and the liquid (water) filling the well, that is, in this way the inverse problem of thermal conductivity is solved. Experimental studies were carried out to determine the coefficient of thermal conductivity by the method of using a borehole in the territory of the botanical garden in Kyiv. The results of the studies carried out are compared with laboratory studies of the thermal conductivity of core samples. The deviation in the determination of thermal conductivity is in the range of 2–15%.