CO2 leakage detection in the near-surface above natural CO2-rich water aquifer using soil gas monitoring
| Autor: | Young Jae Shinn, Kyoung-Ho Kim, Seong Taek Yun, Ji-Hoon Kim, Jihyun Kim, Gi-Tak Chae, Soonyoung Yu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Atmospheric air
geography geography.geographical_feature_category Soil gas Flux Sampling (statistics) Aquifer Soil science 02 engineering and technology Inflow 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Pollution Industrial and Manufacturing Engineering Natural (archaeology) General Energy 020401 chemical engineering Co2 leakage Environmental science 0204 chemical engineering 0105 earth and related environmental sciences |
| Zdroj: | International Journal of Greenhouse Gas Control. 88:261-271 |
| ISSN: | 1750-5836 |
| DOI: | 10.1016/j.ijggc.2019.06.015 |
| Popis: | Conventional soil gas monitoring methods were applied above a natural low-level CO2 reservoir to locate natural CO2 leakage and assess effectiveness in monitoring geological carbon storage sites. The concentrations of the soil gas (N2, O2, and CO2) and carbon-13 isotopes of soil CO2 (δ13CCO2) were determined for ninety-four soil gas samples that were collected at a depth of ∼60 cm. The CO2 flux was also measured at the same sampling locations. The 93 soil gas samples were divided into two groups: Group A with low soil CO2 concentrations and high δ13CCO2, which was influenced by the atmospheric air, and Group B with high soil CO2 concentrations and low δ13CCO2, which originated from microbial processes. Sample M17, which was close to a CO2-rich water well, had an exceptionally high soil CO2 (36.0% v/v), δ13CCO2 (-5.7‰), and flux (546.2 g/m2/d), indicating geogenic CO2 inflow to the soil layer and discharge through the surface. This study shows that conventional soil gas monitoring methods are useful for locating CO2 leakage. A dense grid soil CO2 sampling near wells and periodic investigations are crucial for further understanding of the CO2 flow paths in the soil layer. |
| Databáze: | OpenAIRE |
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