期刊
AEROSOL AND AIR QUALITY RESEARCH
卷 21, 期 12, 页码 -出版社
TAIWAN ASSOC AEROSOL RES-TAAR
DOI: 10.4209/aaqr.210220
关键词
Carbon dioxide leakage; Carbon sequestration; Crustal tilt
资金
- National Natural Science Foundation of China [41874113]
- National Institute of Natural Hazards, Ministry of Emergency Management of China [ZDJ2019-15]
The paper examines the relationship between crustal tilt and carbon dioxide leakage, highlighting a significant correlation between the two. Through studying a natural carbon-dioxide-rich formation with faults, it is found that an increase in carbon dioxide leakage levels may be caused by changes in fault architecture and permeability structure surrounding the faults.
Carbon sequestration has recently become more widely recognized as a potential means of reducing atmospheric carbon dioxide levels. Understanding the tectonic relationship of carbon dioxide discharges and the sealing behavior of faults is conducive for predicting the long-term integrity of geological storage formations. Of primary concern is the influence of crustal deformation on the carbon dioxide leakage through fault zones during large-scale underground injection. This paper examines a record of carbon dioxide leakage from a faulted, natural carbon-dioxide-rich formation, and investigates the crustal tilt in the fault zones. Temporal changes in the crustal tilt reveal pulses of carbon dioxide concentrations ranging from 537.7 up to 1317.1 ppm, and the mean level represents 890.2 ppm. Of particular interest is that each high-frequency pulse coincides with the onset of local solid-earth tide. We show a significant correlation between the crustal tilt magnitude and amount of carbon dioxide leakage. We suggest that carbon dioxide leakage levels increase owing to fracture opening, potentially caused by changes in fault architecture and permeability structure of regions surrounding the faults.
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