Inducing a CO₂ Leak into a Shallow Aquifer (CO2FieldLab Eurogia+ Project): Monitoring the CO₂ Plume in Groundwaters

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• 作者：Fr¨¦d¨¦rick Gal ; Eric Proust ; Pauline Humez ; Gilles Braibant ; Michel Brach ; Florian Koch ; David Widory ; Jean-Fran?ois Girard
• 关键词：CO2 ; water monitoring ; leakage experiment
• 刊名：Energy Procedia
• 出版年：2013
• 出版时间：2013
• 年：2013
• 卷：37
• 期：Complete
• 页码：3583-3593
• 全文大小：1393 K

文摘

The CO₂ Field Lab project consisted in an injection of 1.7 tons of CO₂ at a 20 m depth within a shallow aquifer located in fluvio-glacial deposits. Baseline acquisitions, leakage monitoring and post-injection monitoring were performed in the water phase at different depths (5, 10 and 15 m).

Strong deviations of pH, specific conductance or alkalinity were observed and monitored at the horizons affected by the CO₂ intrusion. The complex distribution of waters in the ridge deposits not only induced water/rock interactions but also mixing of saline and fresh waters. This points out the complexity of natural environments and the challenge in identifying CO₂ leakage from deeper-seated reservoirs.