Study on prevention and control measures of sandstone geothermal reinjection plugging

In the process of geothermal tailwater reinjection of sandstone, the problem of plugging has been seriously restricting the continuous development of geothermal reinjection for many years, and the problems of plugging are complex and changeable. The plugging in the process of reinjection can be divi...

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Bibliographic Details
Published in:Water science and technology 2023-03, Vol.87 (6), p.1571-1581
Main Authors: Wang, Xiangtao, Wang, Jianzhong, Yan, Guangyu, Liu, Xiaozhe, Huang, Yue, Tian, Suo, Xu, Qingfa
Format: Article
Language:English
Subjects:
blockage
Chlorine
Chlorine dioxide
Efficiency
Experiments
Microorganisms
Particle size
Plugging
Prevention
prevention and control measures
Reinjection
Sandstone
sandstone geothermal
Sedimentary rocks
simulation experiment
Tailwater
tailwater reinjection
Zeolites
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Summary:In the process of geothermal tailwater reinjection of sandstone, the problem of plugging has been seriously restricting the continuous development of geothermal reinjection for many years, and the problems of plugging are complex and changeable. The plugging in the process of reinjection can be divided into physical plugging, chemical plugging, microbial plugging and gas plugging. Given these four types of blocking, according to the mechanism characteristics of the blocking caused by them, this paper puts forward corresponding blocking prevention measures and solves the current blocking problems by filtering, adding a scale inhibitor, intermittent reinjection, adding chlorine dioxide and regular lifting. In addition, the existing reinjection process and the equipment flow are relatively simple and cannot achieve the goal of efficient reinjection. Therefore, a complete set of reinjection processes is designed to ensure the efficient reinjection of sandstone geothermal tailwater.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2023.078