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A platform for research: civil engineering, architecture and urbanism
Temporary plugging type high-water-permeability porous cement-based material suitable for medium-low temperature geothermal wells and preparation method thereof
The invention provides a temporary plugging type high-permeability porous cement-based material suitable for a medium-low temperature geothermal well and a preparation method thereof. The preparationmethod comprises the following steps: 1, drying and stirring raw materials at a low speed by utilizing a cement paste stirrer; 2, continuously starting the cement paste stirrer filled with the uniformly mixed raw materials, and adding tap water into the cement paste stirrer; 3, stirring the raw materials and water at a low speed, a stop speed and a high speed through a cement paste stirrer; 4, injecting the prepared slurry into a cubic triple test mold for maintenance; and 5, soaking the porous cement-based material in hot water to form the high-water-permeability porous cement-based material.The invention aims at vast medium and low temperature geothermal resources in China, wherein based on the temperature change rule in the development process, a porous material is formed after well drilling is finished while effective leaking stoppage is achieved and hole wall stability is guaranteed, the time cost of acidifying blockage removal measures or the risk of accidents caused by the factthat broken cement blocks deposit at the bottom of a well is reduced, and economic benefits are improved. Therefore, the development of geothermal energy in China is facilitated to a certain extent.
本发明提供了一种适用于中低温地热井的暂堵型高透水多孔水泥基材料及其制备方法，其制备方法包括：1、利用水泥净浆搅拌机对原材料进行低速干燥搅拌；2、继续打开装有混合均匀后原材料的水泥净浆搅拌机，向其中添加自来水；3、将原材料和水经过水泥净浆搅拌机在低速、停止、高速进行搅拌；4、将配制好的浆液注入立方体三联试模中进行养护；5、将其置于热水中浸泡，形成高透水多孔水泥基材料。本发明针对我国广大的中低温地热资源，利用开发过程中的温度变化规律，在有效堵漏及保证孔壁稳定的同时，钻井结束后形成多孔材料，减少了酸化解堵措施的时间成本或破碎后水泥块沉积井底引发事故的风险，从而在一定程度上有益于我国地热能的发展。
Temporary plugging type high-water-permeability porous cement-based material suitable for medium-low temperature geothermal wells and preparation method thereof
The invention provides a temporary plugging type high-permeability porous cement-based material suitable for a medium-low temperature geothermal well and a preparation method thereof. The preparationmethod comprises the following steps: 1, drying and stirring raw materials at a low speed by utilizing a cement paste stirrer; 2, continuously starting the cement paste stirrer filled with the uniformly mixed raw materials, and adding tap water into the cement paste stirrer; 3, stirring the raw materials and water at a low speed, a stop speed and a high speed through a cement paste stirrer; 4, injecting the prepared slurry into a cubic triple test mold for maintenance; and 5, soaking the porous cement-based material in hot water to form the high-water-permeability porous cement-based material.The invention aims at vast medium and low temperature geothermal resources in China, wherein based on the temperature change rule in the development process, a porous material is formed after well drilling is finished while effective leaking stoppage is achieved and hole wall stability is guaranteed, the time cost of acidifying blockage removal measures or the risk of accidents caused by the factthat broken cement blocks deposit at the bottom of a well is reduced, and economic benefits are improved. Therefore, the development of geothermal energy in China is facilitated to a certain extent.
本发明提供了一种适用于中低温地热井的暂堵型高透水多孔水泥基材料及其制备方法，其制备方法包括：1、利用水泥净浆搅拌机对原材料进行低速干燥搅拌；2、继续打开装有混合均匀后原材料的水泥净浆搅拌机，向其中添加自来水；3、将原材料和水经过水泥净浆搅拌机在低速、停止、高速进行搅拌；4、将配制好的浆液注入立方体三联试模中进行养护；5、将其置于热水中浸泡，形成高透水多孔水泥基材料。本发明针对我国广大的中低温地热资源，利用开发过程中的温度变化规律，在有效堵漏及保证孔壁稳定的同时，钻井结束后形成多孔材料，减少了酸化解堵措施的时间成本或破碎后水泥块沉积井底引发事故的风险，从而在一定程度上有益于我国地热能的发展。
Temporary plugging type high-water-permeability porous cement-based material suitable for medium-low temperature geothermal wells and preparation method thereof
适用于中低温地热井的暂堵型高透水多孔水泥基材料及其制备方法
TAN HUIJING (author) / ZHU HAIYAN (author) / SHEN LAN (author) / QIU DELONG (author) / FAN LISHENG (author) / ZUO YUE (author) / ZHANG GENGCHAO (author) / LIU XU (author) / XIE LANLAN (author)
2021-02-26
Patent
Electronic Resource
Chinese
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