Well cementing cement material with high thermal conductivity for geothermal exploitation

Abstract

The invention discloses a well cementing cement material with high thermal conductivity for geothermal exploitation. The well cementing cement material comprises water, ordinary Portland cement (P.O442.5), a thermal conductive reinforcing material, a JSS water reducing agent, sodium chloride (NaCl) and triethanolamine (TEA); according to the water cement ratio, the weight ratio of the water to theordinary Portland cement is 0.5-0.7; with the mass ratio of the ordinary Portland cement as reference, the mass ratio of the thermal conductive reinforcing material is 10%, the mass ratio of the JSSwater reducing agent is 0.2-0.4%, the mass ratio of the sodium chloride (NaCl) is 0.3-1.3%, and the mass ratio of the triethanolamine (TEA) is 0.01-0.03%. The well cementing cement material with highthermal conductivity for geothermal exploitation has the advantages of being conductive to reducing the density of cement grout, having a good effect when low-density cement grout needs to be utilized, shortening the coagulating time, being better in sedimentary stability, meeting requirements in compressive strength and being greatly improved in thermal conductivity.

Description

technical field [0001] The invention relates to the technical field of well cementing slurry, in particular to a cement material with high thermal conductivity for geothermal exploitation. Background technique [0002] my country's new energy development is gradually strengthening. As one of the new energy sources, geothermal energy is not only rich in resources, but also has the advantages of stability and continuity. Therefore, geothermal energy development has become one of the hot spots of energy development today. According to the procedure of geothermal energy exploitation, the thermal conductivity of cement will greatly affect the utilization rate of geothermal energy. Therefore, it is of great practical significance to improve the thermal conductivity of production layer cementing cement and to study a new type of cementing material with high thermal conductivity. [0003] At present, there are few studies on improving the thermal conductivity of cement at home and ...

AI Technical Summary

Problems solved by technology

The few studies on improving the thermal conductivity of building materials mostly focus on improving the thermal conductivity of cement mortar or concrete, and there are very few studies on improving the thermal conductivity of cementing cement.

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