INVESTIGATION OF BOREHOLE THERMOGRAMS OF THE BEREGOVSKY HYDROTHERMAL DEPOSIT

• Дата: 2017
• Автор: Barylo, A.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Institute of Renewable Energy National Academy of Sciences of Ukraine 2017
• Теми: thermogram; heat flow; geothermal gradient; convective component; thermal conductivity
• Онлайн доступ: https://ve.org.ua/index.php/journal/article/view/27
• Назва журналу: Vidnovluvana energetika

The Beregovsky geothermal deposit is a complex geological formation with very heterogeneous hydrogeological conditions. It has a block structure, faults and tectonic faults with unclear filtration conditions. The productive horizon is extremely unstable. In such conditions it is very difficult to choose a suitable calculation model of а deposit. Interpretation of borehole thermograms can be very useful in this case. The interpretation of the well thermograms that were obtained during drilling, experimental injection into well 19-T and industrial operation was performed. The analysis of borehole thermographs showed that the thermal field of the Beregovsky geothermal deposit in the undamaged state is formed mainly under the action of the conductive component, and groundwater filtration has a subordinate value. In the vicinity of the location of wells, no significant areas of power were found. According to the map of thermal flows, the main supply area is located in the south-easterly direction from the contour of the deposit at a distance of 1.5-2 km. The balance method for the data of well №15-Т is designed to calculate the amount of heat entering the well due to groundwater filtration, which is equal to 13 mW / m2. The rate of filtration at the same time is 0.014 cm/day. Experimental injection into well No. 19-T showed that water enters the horizon, which is located above the productive horizon. Recommendations for further exploration of the Beregovsky geothermal deposit are given.