Well cementing cement material with high thermal conductivity for geothermal exploitation

A technology of cementing and high thermal conductivity, which is applied in the field of cementing slurry, can solve the problems of little research on thermal conductivity, and achieve the effects of shortening the setting time, matching the compressive strength and reducing the density

Inactive Publication Date: 2018-11-06
CHENGDU UNIVERSITY OF TECHNOLOGY
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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.

Method used

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  • Well cementing cement material with high thermal conductivity for geothermal exploitation

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0025] A cement material with high thermal conductivity for geothermal exploitation, the cement material for well cementing includes:

[0026] Water, ordinary Portland cement (P.O42.5), thermal conductivity enhancing material, JSS water reducer, sodium chloride (NaCl) and triethanolamine (TEA);

[0027] Water-cement ratio: the weight ratio of water to ordinary Portland cement: 0.6;

[0028] The following is calculated according to the mass ratio of ordinary Portland cement;

[0029] Thermal conductivity enhancement material 600 mesh graphite, the mass ratio is 10%;

[0030] The mass ratio of JSS water reducer is: 0.3%;

[0031] Sodium chloride (NaCl) mass ratio is: 0.3%;

[0032] The mass ratio of triethanolamine (TEA) is: 0.02%.

[0033] The actua...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00724C04B2201/32C04B2201/50C04B2103/302C04B22/124C04B24/122C04B14/34C04B14/48C04B14/024C04B14/386C04B14/4693C04B14/42
Inventor 王胜舒智宏蹇黎明陈礼仪李之军
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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