Regional CO2 solubility trapping potential of a deep saline aquifer in Pohang basin, Korea

This paper presents regional CO 2 solubility trapping potential for stable CO 2 storage as immobile phase and decomposed form while CO 2 migrates through flow pathways characterized by the geological structure of an aquifer in Pohang basin, SE offshore Korea. The saline aquifer in Pohang basin has b...

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Bibliographic Details
Published in:Geosciences journal (Seoul, Korea) 2016, 20(4), , pp.561-568
Main Authors: Lee, Hyesoo, Seo, Junwoo, Lee, Youngsoo, Jung, Woodong, Sung, Wonmo
Format: Article
Language:English
Subjects:
Aquifers
Brines
Carbon dioxide
Carbon sequestration
Earth and Environmental Science
Earth Sciences
Geological structures
Geology
Seismic surveys
Solubility
Trapping
지질학
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Summary:This paper presents regional CO 2 solubility trapping potential for stable CO 2 storage as immobile phase and decomposed form while CO 2 migrates through flow pathways characterized by the geological structure of an aquifer in Pohang basin, SE offshore Korea. The saline aquifer in Pohang basin has been selected as a target formation for geologic carbon storage due to favorable geologic structures and sedimentary strata defined through seismic survey. The aquifer is confined by southeast and northwest faults, and structure is unconfined and sloping toward the northeast direction. The main target within the aquifer to store CO 2 contains west plunging anticlines. In order to enlarge contact area of CO 2 with brine and improve injectivity, the CO 2 injector is located on marginal anticlines or small synclines. This structure may significantly affect CO 2 flow dynamics through upward migration pathways within the aquifer. We, in this area, provide estimates for CO 2 solubility trapping affected by dynamic CO 2 migration pathways and present different types of CO 2 trapping potentials. The numerical results based on thermodynamic equilibrium equation provide regional CO 2 solubility trapping potential which has a linear relationship with brine salinity. We suggest that dynamic migration pathways resulting from geological structure are significantly important to increase CO 2 solubility trapping potential in geological storage of CO 2 .
ISSN:1226-4806
1598-7477
DOI:10.1007/s12303-015-0068-4