DEVELOPMENT OF A GROUNDWATER MONITORING SYSTEM FOR CO<sub>2</sub> LEAKAGE OF CO<sub>2</sub>-EOR STORAGE IN LOESS TABLELAND REGION

WANG Hao; LIN Qian-guo; GUO Jun-hong; TANG Shu-cheng; WANG Wei-bo; LIANG Xi; LI Sa; DUAN Xiao-ya

doi:10.13205/j.hjgc.202108030

Volume 39 Issue 8

Jan. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(8): 217-226

WANG Hao, LIN Qian-guo, GUO Jun-hong, TANG Shu-cheng, WANG Wei-bo, LIANG Xi, LI Sa, DUAN Xiao-ya. DEVELOPMENT OF A GROUNDWATER MONITORING SYSTEM FOR CO2 LEAKAGE OF CO2-EOR STORAGE IN LOESS TABLELAND REGION[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(8): 217-226. doi: 10.13205/j.hjgc.202108030

Citation:

WANG Hao, LIN Qian-guo, GUO Jun-hong, TANG Shu-cheng, WANG Wei-bo, LIANG Xi, LI Sa, DUAN Xiao-ya. DEVELOPMENT OF A GROUNDWATER MONITORING SYSTEM FOR CO₂ LEAKAGE OF CO₂-EOR STORAGE IN LOESS TABLELAND REGION[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(8): 217-226. doi: 10.13205/j.hjgc.202108030

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DEVELOPMENT OF A GROUNDWATER MONITORING SYSTEM FOR CO₂ LEAKAGE OF CO₂-EOR STORAGE IN LOESS TABLELAND REGION

doi: 10.13205/j.hjgc.202108030

1. College of Environment Science and Engineering, North China Electric Power University, Beijing 102206, China;
2. Suzhou Institute of North China Electric Power University, Suzhou 215123, China;
3. Shaanxi Yanchang Petroleum(Group) Corp. Ltd. Research Institute, Shaanxi, Xi'an 710075, China;
4. University of Edinburgh, Business School, Edinburgh EH89 JS, UK

Received Date: 2020-06-24
Available Online: 2022-01-18

Abstract

Abstract

In view of the lack of literature in monitoring of CO₂ leakage into groundwater and the demand of the monitoring of CO₂-EOR and storage projects in the Loess Tableland Region in the Ordos Basin, in this study, based on comprehensive characterization of the potential CO₂ leakage into groundwater and identification of the spatial migration and time response characteristics of CO₂ leakage into groundwater, a full-time and three-dimensional monitoring system was established for monitoring CO₂ leakage into groundwater associated with CO₂-EOR process in Loess Tableland Region. The result indicated that, affected by topography and soil characteristics, the potential CO₂ leakage into groundwater featured with multiple leakage sources, including caprock breakthrough, shaft side leakage, rainfall infiltration and surface runoff recharge. The migration of CO₂ leaked into the groundwater were characterized with quick diffusion in the vertical direction, slowly spread out in the horizontal direction, and movement along with water flow to downstream. The time response characteristics were also identified with seven indicators to CO₂ leakage into groundwater, such as the increase of CO₂ concentration, conductivity, HCO₃^- concentration, temperature and pressure, the decrease of pH value and the variation of Ca²⁺ and Mg²⁺ concentrations. The developed monitoring system reflecting above characteristics could provide solid support for the monitoring of CO₂-EOR and storage in Loess Tableland Region.
- CO₂-EOR and storage,
- Loess Tableland Region,
- CO₂ leakage,
- groundwater monitoring system

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References(35)

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