CO2 Leakage Identification in Geosequestration Based on Real Time Correlation Analysis Between Atmospheric O2 and CO2

doi:10.1016/S1004-9541(14)60094-X

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (6): 634-642.DOI: 10.1016/S1004-9541(14)60094-X

• 催化、动力学与反应工程 • 上一篇下一篇

CO₂ Leakage Identification in Geosequestration Based on Real Time Correlation Analysis Between Atmospheric O₂ and CO₂

马登龙^1,2, 邓建强², 张早校^1,2

1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
2. School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China

收稿日期:2013-04-08 修回日期:2013-06-07 出版日期:2014-06-28 发布日期:2014-06-06
通讯作者: CHEN Bingzhen
基金资助:
supported by the National Natural Science Foundation of China (51276141, 20936004).

CO₂ Leakage Identification in Geosequestration Based on Real Time Correlation Analysis Between Atmospheric O₂ and CO₂

MA Denglong^1,2, DENG Jianqiang², ZHANG Zaoxiao ^1,2

1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
2. School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China

Received:2013-04-08 Revised:2013-06-07 Online:2014-06-28 Published:2014-06-06
Supported by:
supported by the National Natural Science Foundation of China (51276141, 20936004).

摘要/Abstract

摘要： The paper describes a method for monitoring CO₂ leakage in geological carbon dioxide sequestration. A real time monitoring parameter, apparent leakage flux (ALF), is presented to monitor abnormal CO₂ leakage, which can be calculated by atmospheric CO₂ and O₂ data. The computation shows that all ALF values are close to zero-line without the leakage. With a step change or linear perturbation of concentration to the initial CO₂ concentration data with no leakage, ALF will deviate from background line. Perturbation tests prove that ALF method is sensitive to linear perturbation but insensitive to step change of concentration. An improved method is proposed based on real time analysis of surplus CO₂ concentration in least square regression process, called apparent leakage flux from surplus analysis (ALFs), which is sensitive to both step perturbation and linear perturbations of concentration. ALF is capable of detecting concentration increase when the leakage occurs while ALFs is useful in all periods of leakage. Both ALF and ALFs are potential approaches to monitor CO₂ leakage in geosequestration project.

关键词: CO₂ monitor, carbon storage, gas leakage, O₂/CO₂ exchange, correlation analysis

Abstract: The paper describes a method for monitoring CO₂ leakage in geological carbon dioxide sequestration. A real time monitoring parameter, apparent leakage flux (ALF), is presented to monitor abnormal CO₂ leakage, which can be calculated by atmospheric CO₂ and O₂ data. The computation shows that all ALF values are close to zero-line without the leakage. With a step change or linear perturbation of concentration to the initial CO₂ concentration data with no leakage, ALF will deviate from background line. Perturbation tests prove that ALF method is sensitive to linear perturbation but insensitive to step change of concentration. An improved method is proposed based on real time analysis of surplus CO₂ concentration in least square regression process, called apparent leakage flux from surplus analysis (ALFs), which is sensitive to both step perturbation and linear perturbations of concentration. ALF is capable of detecting concentration increase when the leakage occurs while ALFs is useful in all periods of leakage. Both ALF and ALFs are potential approaches to monitor CO₂ leakage in geosequestration project.

Key words: CO₂ monitor, carbon storage, gas leakage, O₂/CO₂ exchange, correlation analysis

马登龙, 邓建强, 张早校. CO₂ Leakage Identification in Geosequestration Based on Real Time Correlation Analysis Between Atmospheric O₂ and CO₂[J]. Chinese Journal of Chemical Engineering, 2014, 22(6): 634-642.

MA Denglong, DENG Jianqiang, ZHANG Zaoxiao . CO₂ Leakage Identification in Geosequestration Based on Real Time Correlation Analysis Between Atmospheric O₂ and CO₂[J]. Chin.J.Chem.Eng., 2014, 22(6): 634-642.

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CO₂ Leakage Identification in Geosequestration Based on Real Time Correlation Analysis Between Atmospheric O₂ and CO₂

CO₂ Leakage Identification in Geosequestration Based on Real Time Correlation Analysis Between Atmospheric O₂ and CO₂

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