A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Well cementation cement slurry system suitable for CO2 heat extraction type geothermal well and preparation method of well cementation cement slurry system
The invention relates to the technical field of geothermal resource development, in particular to a well cementation cement slurry system suitable for a CO2 heat extraction type geothermal well and a preparation method of the well cementation cement slurry system. The well cementation cement slurry system comprises the following components in percentage by weight: 43 to 73 weight percent of low-heat Portland cement, 10 to 15 weight percent of siliceous tailings, 5 to 10 weight percent of waste magnesia carbon bricks, 10 to 30 weight percent of CO2 corrosion-resistant high-thermal-conductivity material, 1.5 weight percent of dispersing agent, 0.5 weight percent of high-temperature stabilizer, 2 to 4 weight percent of high-temperature fluid loss agent, 1 to 3 weight percent of high-temperature retarder and 0.25 weight percent of defoaming agent, wherein the high-temperature fluid loss agent accounts for 2 to 4 weight percent of the total mass of the raw materials. The additive has the characteristics of good system stability, low filter loss, good additive adaptability, adjustable thickening time and the like; in addition, the material also has the characteristics of high heat conductivity coefficient, CO2 corrosion resistance, gas channeling resistance, good high-temperature toughness and the like.
本发明涉及地热资源开发技术领域，具体涉及适用于CO2取热型地热井用固井水泥浆体系及其制备方法，固井水泥浆体系包括按重量百分比计的43wt.％～73wt.％低热硅酸盐水泥、10wt.％～15wt.％硅质尾矿、5wt.％～10wt.％废弃镁碳砖、10wt.％～30wt.％耐CO2腐蚀高导热材料、1.5wt.％分散剂、0.5wt.％高温稳定剂，占以上原料总质量百分比的2wt.％～4wt.％高温降失水剂、1wt.％～3wt.％高温缓凝剂、0.25wt.％消泡剂。本发明具有体系稳定性好、滤失量低、外加剂适应性好、稠化时间可调等特性；此外，还具备导热系数高、抗CO2腐蚀、防气窜和高温韧性好等特点。
Well cementation cement slurry system suitable for CO2 heat extraction type geothermal well and preparation method of well cementation cement slurry system
The invention relates to the technical field of geothermal resource development, in particular to a well cementation cement slurry system suitable for a CO2 heat extraction type geothermal well and a preparation method of the well cementation cement slurry system. The well cementation cement slurry system comprises the following components in percentage by weight: 43 to 73 weight percent of low-heat Portland cement, 10 to 15 weight percent of siliceous tailings, 5 to 10 weight percent of waste magnesia carbon bricks, 10 to 30 weight percent of CO2 corrosion-resistant high-thermal-conductivity material, 1.5 weight percent of dispersing agent, 0.5 weight percent of high-temperature stabilizer, 2 to 4 weight percent of high-temperature fluid loss agent, 1 to 3 weight percent of high-temperature retarder and 0.25 weight percent of defoaming agent, wherein the high-temperature fluid loss agent accounts for 2 to 4 weight percent of the total mass of the raw materials. The additive has the characteristics of good system stability, low filter loss, good additive adaptability, adjustable thickening time and the like; in addition, the material also has the characteristics of high heat conductivity coefficient, CO2 corrosion resistance, gas channeling resistance, good high-temperature toughness and the like.
本发明涉及地热资源开发技术领域，具体涉及适用于CO2取热型地热井用固井水泥浆体系及其制备方法，固井水泥浆体系包括按重量百分比计的43wt.％～73wt.％低热硅酸盐水泥、10wt.％～15wt.％硅质尾矿、5wt.％～10wt.％废弃镁碳砖、10wt.％～30wt.％耐CO2腐蚀高导热材料、1.5wt.％分散剂、0.5wt.％高温稳定剂，占以上原料总质量百分比的2wt.％～4wt.％高温降失水剂、1wt.％～3wt.％高温缓凝剂、0.25wt.％消泡剂。本发明具有体系稳定性好、滤失量低、外加剂适应性好、稠化时间可调等特性；此外，还具备导热系数高、抗CO2腐蚀、防气窜和高温韧性好等特点。
Well cementation cement slurry system suitable for CO2 heat extraction type geothermal well and preparation method of well cementation cement slurry system
适用于CO2取热型地热井用固井水泥浆体系及其制备方法
ZHAO FENG (author) / CHENG XIAOWEI (author) / ZENG XUELING (author) / LONG DAN (author) / GU ANLIN (author) / WANG JIA (author)
2024-02-20
Patent
Electronic Resource
Chinese
| European Patent Office | 2023
| European Patent Office | 2023
Well cementation cement slurry composition and well cementation cement slurry
| European Patent Office | 2022