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Leakage Mitigation During CO2 Geological Storage Process Using CO2 Triggered Gelation
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2019-02-12 , DOI: 10.1021/acs.iecr.8b05049
Dexiang Li 1 , Liang Zhang 2 , Shaoran Ren 2 , Hongxing Rui 1
Affiliation  

CO2 leakage is a fatal issue for the successful application of CO2 geological storage. In this paper, a method using CO2 triggered gelation is proposed to control the CO2 leakage during CO2 geological storage process. The mechanisms of CO2 triggered gelation was illustrated schematically. The effectiveness of this method for blocking CO2 leakage was evaluated by experimental works using sand-pack model. Reactive flow simulations were conducted to reproduce the experimental results and investigate field-scale feasibility of this method. The results show that this method can control the assumed leakage and the blocking performance was reproduced well by the lab-scale reactive flow simulation model. The results of simulation indicate that gel can be formed and absorbed more easily near the injection point. Feasibility of this method in field-scale were demonstrated with different scenarios of preplaced gel system. Infill drilling and monitoring method with high accuracy are recommended to assist this method.

中文翻译:

使用CO 2引发的胶凝作用减轻CO 2地质存储过程中的泄漏

CO 2泄漏是成功应用CO 2地质封存的致命问题。本文提出了一种利用CO 2触发胶凝的方法来控制CO 2地质存储过程中CO 2的泄漏。示意性地说明了CO 2触发胶凝的机理。这种方法对阻止CO 2的有效性使用沙堆模型通过实验工作对渗漏进行了评估。进行了反应流模拟以重现实验结果,并研究了该方法在现场规模上的可行性。结果表明,该方法可以控制假定的泄漏,并且通过实验室规模的反应流仿真模型可以很好地再现阻塞性能。模拟结果表明,在注入点附近可以更容易地形成和吸收凝胶。在预先放置的凝胶系统的不同情况下,证明了该方法在现场规模上的可行性。建议使用高精度的钻孔和监测方法来辅助此方法。
更新日期:2019-02-13
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