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A platform for research: civil engineering, architecture and urbanism
Plugging method for carbon-buried abandoned well
The invention discloses a carbon-buried abandoned well plugging method which comprises the steps that an open hole or a perforation section is sealed, a first plugging surface is formed, and the position of the first plugging surface is higher than a casing shoe of an intermediate casing; cement is injected into the first plug surface for plugging to form a second plug surface; a suspension is injected into the second plug surface to form a suspension layer, and the suspension comprises barite and Pb (OH) 2; cement is injected on the suspension layer for plugging to form a third plug surface, and the position of the third plug surface is higher than the cement return depth of the production casing; and a corrosion inhibition liquid is injected into the third plug surface through a lower light oil pipe at the upper part of the shaft. According to the blocking method for the carbon-buried abandoned well, the problem of carbon burying of the abandoned well can be solved, and the problems that when a conventional cement plug or mechanical well blocking technology is adopted for well blocking treatment of the CCUS abandoned well, long-term effective sealing performance of a shaft is difficult to guarantee, and serious potential safety hazards exist can be solved.
本发明公开了一种碳埋存的废弃井的封堵方法，该方法包括：封闭裸眼或射孔段，形成第一塞面，第一塞面的位置高于技术套管的套管鞋；第一塞面上注水泥封堵形成第二塞面；在第二塞面上注入混悬剂形成混悬剂层，其中，混悬剂包含重晶石和Pb(OH)2；混悬剂层上注水泥封堵形成第三塞面，第三塞面的位置高于生产套管水泥返深；井筒上部下光油管，在第三塞面上注入缓蚀液。本发明提供的碳埋存的废弃井的封堵方法能够解决碳埋存废弃井的问题，能够解决采用常规水泥塞或机械封井工艺对CCUS废弃井进行封井处理，难以保证井筒长期有效的密封性，存在严重的安全隐患问题。
Plugging method for carbon-buried abandoned well
The invention discloses a carbon-buried abandoned well plugging method which comprises the steps that an open hole or a perforation section is sealed, a first plugging surface is formed, and the position of the first plugging surface is higher than a casing shoe of an intermediate casing; cement is injected into the first plug surface for plugging to form a second plug surface; a suspension is injected into the second plug surface to form a suspension layer, and the suspension comprises barite and Pb (OH) 2; cement is injected on the suspension layer for plugging to form a third plug surface, and the position of the third plug surface is higher than the cement return depth of the production casing; and a corrosion inhibition liquid is injected into the third plug surface through a lower light oil pipe at the upper part of the shaft. According to the blocking method for the carbon-buried abandoned well, the problem of carbon burying of the abandoned well can be solved, and the problems that when a conventional cement plug or mechanical well blocking technology is adopted for well blocking treatment of the CCUS abandoned well, long-term effective sealing performance of a shaft is difficult to guarantee, and serious potential safety hazards exist can be solved.
本发明公开了一种碳埋存的废弃井的封堵方法，该方法包括：封闭裸眼或射孔段，形成第一塞面，第一塞面的位置高于技术套管的套管鞋；第一塞面上注水泥封堵形成第二塞面；在第二塞面上注入混悬剂形成混悬剂层，其中，混悬剂包含重晶石和Pb(OH)2；混悬剂层上注水泥封堵形成第三塞面，第三塞面的位置高于生产套管水泥返深；井筒上部下光油管，在第三塞面上注入缓蚀液。本发明提供的碳埋存的废弃井的封堵方法能够解决碳埋存废弃井的问题，能够解决采用常规水泥塞或机械封井工艺对CCUS废弃井进行封井处理，难以保证井筒长期有效的密封性，存在严重的安全隐患问题。
Plugging method for carbon-buried abandoned well
一种碳埋存的废弃井的封堵方法
YAN XUANQI (author) / ZHU RUIBIN (author) / XIE GANG (author) / ZHAI XIZHI (author) / QIN ZHONGHAI (author) / YAN HAIJUN (author) / HSIEH JIANG (author) / WANG YINGRUI (author) / WEI LILI (author) / SUN ZHEYONG (author)
2023-07-11
Patent
Electronic Resource
Chinese
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