SU872729A1 - Method of monitoring heat carrier motion - Google Patents

Description

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The invention relates to the mining industry and can be used in enterprises extracting natural sulfur by the method of under-earth smelting, as well as in other enterprises that extract minerals using heat-transfer agents.

;: 1l of rational use of heat supplied with coolant to the well, for example, at the sulfur underhead heading, it is necessary to direct the flow of coolant towards the development of the site, not allowing it to be filtered to the flanks of the front of mining, or back to the smelting zone reservoir. Their means are known to allow active influence on the distribution of coolant in the reservoir, for example, intensive withdrawal of formation water through front-lying wells. However, to control this method it is necessary to have

way to control the movement of coolant.

Known methods of controlling the movement of the coolant by direct temperature measurements in the reservoir 1 J.

However, direct measurements of temperatures in the reservoir have not been practically disseminated due to their high cost and complexity of technical implementation. In addition, the measurement of temperatures in the reservoir through the wells does not allow you to see the change in temperature outside the production area, and, therefore, control the coolant throughout the production area. In this case, the operation of thermocouples and lead wires is also insufficiently reliable, under conditions of elevated temperatures,

20 that take place in the bottom hole.

A method is also known to control the movement of the coolant, including drilling wells 1.5-1.6 m deep from the day surface, installing sensors in them, measuring the characteristics of the thermal field with these sensors, and building a vector defining the direction of movement of the coolant f2. However, this method is characterized by insufficient reliability, accuracy and reliability of controlling the movement of the heat transfer medium by changing the temperature field in the near-surface layer; the need to carry out complex analytical calculations to determine the temperature field in the distribution zone of the coolant as measured by temperatures in the surface layer, reduced accuracy obtained by analytically calculating the temperature field in the distribution zone of the coolant, due to errors in determining the thermal parameters of rocks, the presence of bulky, complex and expensive instrumentation, including a geometrical probe of a special design with piezoelectric thermostats resonator, as well as low sensitivity of the measuring element, which reduces the quality and reliability of the results. The aim of the invention is to increase the accuracy and reliability of the method as well as reduce its labor intensity. The goal is achieved by using heat meters as sensors, which measure the heat fluxes from the coolant to the day surface, and build a vector that determines the direction of heat carrier movement by finding a set of heat flux vectors on the constructed values of heat fluxes of isoline maps. The drawing shows a contour map of heat fluxes at a production site with heat flux vectors. The method under specific conditions is carried out as follows. To determine the direction of movement of the coolant, a sero-extraction site with an area of 20 thousand meters was chosen. The site includes 14 wells, 10 of them are mining and 4 drainage wells. The wells are located in. In a chemically orderly manner with a distance of 40 m between them. In gray mining, injection wells 1-3 pump coolant and drain out of wells 4-7. When the high-temperature coolant moves (the temperature of the coolant ending in the well -16016 C), powerful heat flows from the coolant in the zone of its spread to the surface are generated in the ore massif. In the studied serum production area, a well is drilled, 1.5–1.6 m deep from the day surface, with a diameter of 350–360 mm, which is caused by standard dimensions of heat meters. At a depth of 1.5-1.6 m in the well, a side hem is made, with a width of 350-360 mm, a height of 35-40 mm, into which a standard heat meter is placed. Heat meters are located in a shakhmatny order between sero-production wells with a distance between heat meters of 40 m. In this case, 22 heat meters must be installed. The lead wires from the heat meters are connected to two twelve-point potentiometers EPPGO and record the heat fluxes until the heat flux lines on the chart tapes become constant, after which the instrument reads. The resulting heat flux values are tabulated. The values of the heat fluxes indicated in the table are plotted on the well location plan and, on a scale known by the known method, a heat flux map in the isolines relative to the 2H well is constructed. On each line, points C, 5, C, C, C C 11 are located as far as possible from well 2. The distance from well 2 to the corresponding points found on the heat flux map is: to point a - m; - 25.0 m; C - 37.0 m; 9 - 50.0 m; e - 70.0 m; {- 86.2 m; K - 100.5 m; VI- 113.0 m; e-130.0 m. Interconnection points a, 6, (1 d e JJ j K, V4, 6,., determine the vector B of heat flux distribution from well 2. Similarly, it builds isolines of heat fluxes relative to wells 1Н, ЗН , find points O, b, C ..., as well as oj, 6 s and build the CD and EF vectors of heat flux distribution from wells 1 and 3. "- The set of vectors AB, CD and / EF shows that the coolant propagates from the injection wells 1, 2 and 3 mainly in the direction of the drainage wells 5 and 6. Using the proposed method of controlling the movement of Onosite will provide more accurate information and reliable information compared to controlling the movement of coolant from near-surface temperature measurements, the absence of complex analytical calculations to obtain the data necessary for mapping the heat field of the gray-mining area, there is no need for complex analytical calculations bulky, complex and expensive measurement instrumentation; increasing the sensitivity of the measuring element; improving the quality and reliability of the results obtained.

 the invention. The method of controlling the movement of the coolant, including drilling a well to a depth of 1.5-1.6 m from the day surface, installing sensors in them, measuring the characteristics of the thermal field with these sensors and building a vector that determines the direction of movement of the coolant, In order to increase the accuracy and availability of the method, as well as reduce its labor intensity, heat meters are used as sensors, with the help of which heat flow rates from the heat carrier to the day surface are measured. The torus determines the direction of motion of the coolant is carried out by finding the set of vectors of heat fluxes on the contour map constructed from the measured values of heat fluxes. Sources of information taken into account in the examination 1.Tarkhov AG and others. Underground geophysics. M. Nedra, 1973, s, 1A5. 2. Development of a method for controlling the movement of coolants in the process of underground smelting of sulfur by the method of surface geometric survey. Report by the Institute of Geology and Geochemistry of Combustible Minerals of the Ukrainian SSR Academy of Sciences Lviv, 1976, p. 55-65.

Claims (1)

Claim ' ·: The method of controlling the movement of the coolant, including drilling wells to a depth of 1.5-1.6 m from the day surface, installing sensors in them, measuring the characteristics of the thermal field using these sensors, and constructing a vector that determines the direction of movement of the coolant, characterized in that, In order to increase the accuracy and reliability of the method, as well as to reduce its labor intensity, heat meters are used as sensors, with which they measure the values of heat fluxes from the heat carrier to the daily surface I, and the construction in A vector that determines the direction of motion of the coolant is carried out by finding the totality of the heat flux vectors on the isoline map constructed from the measured values of the heat fluxes.