Abstract
Most deep saline aquifers consist of multiple layers, and CO2 is generally injected through the injection well in a commingled form with one tubing string. Layer thicknesses and physical properties such as permeability and porosity vary from layer to layer because of differences in lithology and mineral compositions. When a heterogeneity such as a fault exists, if CO2 is rapidly introduced first into a certain layer, this CO2 reaches fault faster than other layers. Therefore, it is necessary to consider the characteristics of each layer in multi-layered aquifer, particularly in commingled well. In this study, rate allocation by layer was calculated in the multi-layered Pohang Basin aquifer, Korea, and whether CO2 reaches the fault and the pore pressure at the fault exceeds the fault reactivation pressure were investigated to evaluate the stability of the aquifer. In addition, the maximum CO2 storage capacity of the aquifer was estimated and we observed changes in trapping mechanisms over a 1,000-year period after the cessation of injection. The results of the analysis indicate that when up to 50 ktonnes of CO2 was injected into the Pohang Basin multi-layered aquifer over a two-year period, the rate allocations of the upper and lower layers were 70% and 30%, respectively. CO2 did not reach to the closest EF1 fault, and the pore pressure at this fault did not exceed the fault reopening pressure. The maximum possible storage capacity was conservatively calculated under the conditions of fault reactivation pressure (11.7 MPa) and maximum compressor capacity (14 MPa), indicating that a total of 160 ktonnes can be stably injected over six years without reaching the fault. In order to evaluate the stability of the aquifer, the changes in trapping mechanisms over a 1,000-year period were observed. According to the results, structural trapping decreased drastically, from 64.7% to 4.5%, over 1000 years. Meanwhile, solubility and residual trapping increased significantly, from 35.3% to 95.5%. Therefore, the data analyzed to date indicate that the project injecting CO2 in a commingled form from single tubing in the multi-layered Pohang Basin aquifer, Korea, has no possibility of CO2 leakage due to fault reopening.
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References
Cheong, S., Koo, N.H., Kim, Y.J., Lee, H.Y., Kim, B.Y., and Shinn, Y.J., 2016, Case study of seismic surveying and data processing for small-scale carbon capture and storage in the Pohang Basin. Near Surface Geoscience 2016. 22nd European Meeting of Environmental and Engineering Geophysics (Abstract), Barcelona, Sep. 4, p. 1–5. https://doi.org/10.3997/2214-4609.201601935
Choi, B.Y., Park, Y.C., Shinn, Y.J., Kim, K.Y., Chae, G.T., and Kim, J.C., 2015a, Preliminary results of numerical simulation in a small-scale CO2 injection pilot site: 1. Prediction of CO2 plume migration. Journal of the Geological Society of Korea, 51, 487–496. https://doi.org/10.14770/jgsk.2015.51.5.487
Choi, B.Y., Shinn, Y.J., Park, Y.C., and Park, J.Y., 2015b, Preliminary results of numerical simulation in a small-scale CO2 injection pilot site: 2. Effect of SO2 impurity on CO2 storage. Journal of the Geological Society of Korea, 51, 497–509. https://doi.org/10.14770/jgsk.2015.51.5.497
Gilfillan, S.M., Wilkinson, M., Haszeldine, R.S., Shipton, Z.K., Nelson, S.T., and Poreda, R.J., 2011, He and Ne as tracers of natural CO2 migration up a fault from a deep reservoir. International Journal of Greenhouse Gas Control, 5, 1507–1516. https://doi.org/10.1016/j.ijggc.2011.08.008
Han, W.S., Lu, M., Mcpherson, B.J., Keating, E.H., Moore, J., Par, E., Watson, Z.T., and Jung, N.H., 2013, Characteristics of CO2-driven cold-water geyser, Crystal Geyser in Utah: experimental observation and mechanism analyses. Geofluids, 13, 283–297. https://doi.org/10.1111/gfl.12018
Heath, J.E., Evans, J.P., and Lachmar, T.E., 2003, Hydrogeochemical characterization of leaking CO2- charged, low net-to-gross fault zones — The Little Grand and Salt Wash fault zones, Emery and Grand Counties, Utah. American Association of Petroleum Geologists Bulletin (Abstract), Barcelona, Sep. 21–24. http://www.searchanddiscovery.com/pdfz/abstracts/pdf/2003/intl/short/ndx_83901.pdf.html
Hwang, J.S., Baek, S.H., Lee, H.S., Jung, W.D., and Sung, W.M., 2015, Evaluation of CO2 storage capacity and injectivity using a relief well in a saline aquifer in Pohang basin, offshore South Korea. Geosciences Journal, 20, 237–245. https://doi.org/10.1007/s12303-015-0038-x
KIGAM (Korea Institute of Geoscience and Mineral Resources), 2012, Site selection for pilot-scale CO2 geologic storage in the Korean Peninsula. Annual Report 2012-0008916, Korea Institute of Geoscience and Mineral Resources, Daejeon, Korea. http://dh120.myelhub.com/_ENG/download/file_2_1/32.pdf
Lee, H.S., Seo, J.W., Lee, Y.S., Jung, W.D., and Sung, W.M., 2016, Regional CO2 solubility trapping potential of a deep saline aquifer in Pohang basin, Korea. Geosciences Journal, 20, 561–568. https://doi.org/10.1007/s12303-015-0068-4
Lee, T.J., Song, Y.H., Park, D.W., Jeon, J.S., and Yoon, W.S., 2015, Three dimensional geological model of Pohang EGS pilot site, Korea. Proceedings of World Geothermal Congress, Melbourne, Apr. 19–25, p. 1–6. http://pangea.stanford.edu/ERE/db/WGC/papers/WGC/2015/31025.pdf
Lee, H., Shinn, Y.J., Ong S.H., Woo, S.W., Park, K.G., Lee, J.L, and Moon, S.W., 2017, Fault reactivation potential of an offshore CO2 storage site, Pohang Basin, South Korea. Journal of Petroleum Science and Engineering, 152, 427–442. https://doi.org/10.1016/j.petrol.2017.03.014
McCracken, M. and Chorneyko, D., 2006, Rate allocation using permanent downhole pressures. Proceedings of the 2006 Society of Petroleum Engineers Annual Technical Conference and Exhibition, San Antonio, Sep. 24–27, p. 1–10. https://doi.org/10.2118/103222-MS
Metz, B., Davidson, O., De Coninck, H., Loos, M., and Meyer, L., 2005, IPCC special report on carbon dioxide capture and storage. Intergovernmental Panel on Climate Change, Cambridge University Press, New York, 443 p. https://www.ipcc.ch/pdf/special-reports/srccs/srccs_wholereport.pdf
Onwunyili, C.C. and Onyekonwu, M.O., 2013, Coupled model for analysis of multilayer reservoir in commingled production. Proceedings of the Society of Petroleum Engineers Nigeria Annual International Conference and Exhibition, Lagos, Aug. 5–7, p. 1–9. https://doi.org/10.2118/167588-MS
Rutqvist, J., Birkholzer, J., Cappa, F., and Tsang, C.F., 2006, Estimating maximum sustainable injection pressure during geological sequestration of CO2 using coupled fluid flow and geomechanical fault-slip analysis. Energy Conversion and Management, 48, 1798–1807. https://doi.org/10.1016/j.enconman.2007.01.021
Song, C.W., Son, M., Sohn, Y.K., Han, R.H., Shinn, Y.J., and Kim, J.C., 2015, A study on potential geologic facility sites for carbon dioxide storage in the Miocene Pohang Basin, SE Korea. Journal of the Geological Society of Korea, 51, 53–66. https://doi.org/10.14770/jgsk.2015.51.1.53
Shipton, Z.K., Evans, J.P., and Kolesar, P.T., 2001, Analysis of CO2-charged fluid migration along faults in naturally occurring gas systems. American Association of Petroleum Geologists Bulletin (Abstract), Denver, Jun. 3–6, 8, p. 283. https://core.ac.uk/download/pdf/87883.pdf
Wu, Y. and Carroll, J.J., 2011, Acid Gas Injection and Related Technologies. Wiley, Hoboken, 433 p. https://onlinelibrary.wiley.com/doi/book/10.1002/9781118094273
Acknowledgments
This work was supported by an Energy Efficiency & Resources (No. 20162010201980) and the Human Resources Development program (No. 20194010201860) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), funded by the Korean government Ministry of Trade, Industry & Energy.
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Kim, J., Song, Y., Shinn, Y. et al. A study of CO2 storage integrity with rate allocation in multi-layered aquifer. Geosci J 23, 823–832 (2019). https://doi.org/10.1007/s12303-019-0004-0
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DOI: https://doi.org/10.1007/s12303-019-0004-0