A kind of heat conduction agent for deep geothermal conduction root system construction and preparation method thereof

Abstract

The invention relates to a heat conduction agent for construction of a deep geotherm conduction root system. The heat conduction agent is prepared from the following raw materials in percentage by weight: 15 to 25% of superfine cement of oil well, 3 to 5% of kaolin, 1 to 3% of bentonite, 1 to 3% of calcium sulfate, 2 to 5% of heat conduction silicon gel, 8 to 15% of carbon fiber, 30 to 50% of water, 2 to 5% of butadiene styrene rubber emulsion, and 10 to 18% of graphite. A preparation method comprises the following steps of at room temperature, fully mixing the superfine cement of the oil well, the carbon fiber and the graphite, so as to obtain a mixture; then, sequentially adding the other components into the mixture, continuously stirring, and uniformly stirring, so as to obtain the heat conduction agent. The heat conduction agent has the advantages that after preparation, the heat conduction agent is directly injected downwards via a surface casing, and the loosen and collapsible terrain under the ground is isolated; the preparation method is simple, and the operation is simple and convenient; the heat conduction agent prepared according to the proportional ratio of the components has obvious heat conduction effect, the adhesion force is strong, the anti-cracking property is good, and the heat conduction effect is more obvious when using in a heat conduction system of the deep geothermal conduction root system.

Description

technical field [0001] The invention belongs to the technical field of geothermal conduction, and in particular relates to a heat conduction agent for deep geothermal conduction root system construction and a preparation method thereof. Background technique [0002] Hot dry rock (HDR), also known as enhanced geothermal system (EGS), or engineering geothermal system, is a high-temperature rock with a general temperature greater than 200 °C, a buried depth of several kilometers, and no fluid inside or only a small amount of underground fluid. body. [0003] In the development of hot dry rock resources, the double well fracturing seepage reinjection method is commonly used in the world. The principle is: drill a well (injection well) from the surface into the hot dry rock, and then close the well hole and inject it into the well at a low temperature under high pressure. If the rock mass is dense and without cracks, the high-pressure water will cause many cracks in the rock mas...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of low thermal conductivity of granite existing in the dual-well fracturing seepage recharge method to obtain geothermal energy, geothermal resources cannot be more effectively conducted to circulating water, and the recharge rate is low, underground rock formations are damaged, and circulating water leakage is lost. Due to the defects of high energy consumption for lifting water, and the problem that existing heat-conducting agents cannot conduct geothermal energy more effectively in deep-layer geothermal exploitation, the present invention provides a heat-conducting agent for deep-layer geothermal conduction root system construction and a preparation method thereof