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Effect of supercritical CO2 as the organic solvent on cap rock sealing performance for underground storage

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  • Okamoto, Ikuo
  • Li, Xiaochun
  • Ohsumi, Takashi

Abstract

Supercritical CO2 fluid is capable of extracting organic matter from rocks. Although the sealing performance of cap rock is essential for CO2 underground storage, typical cap rock such as shale or mudstone usually contains organic matter. To determine how well cap rocks can seal supercritical CO2, cap rock samples from the Nagaoka injection test site were treated with supercritical CO2, and then the porosity and pore radius distribution of the samples were measured by mercury porosimetry. The results showed that the pore radius distributions slightly shifted to a larger size after treatment, while the porosity and permeability changed less than 1%.

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  • Okamoto, Ikuo & Li, Xiaochun & Ohsumi, Takashi, 2005. "Effect of supercritical CO2 as the organic solvent on cap rock sealing performance for underground storage," Energy, Elsevier, vol. 30(11), pages 2344-2351.
    • Handle: RePEc:eee:energy:v:30:y:2005:i:11:p:2344-2351
    DOI: 10.1016/j.energy.2003.10.025
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    Cited by:

    1. Mohammad H. Bhuiyan & Nicolaine Agofack & Kamila M. Gawel & Pierre R. Cerasi, 2020. "Micro- and Macroscale Consequences of Interactions between CO 2 and Shale Rocks," Energies, MDPI, vol. 13(5), pages 1-30, March.
    2. Mavhengere, P. & Wagner, N. & Malumbazo, N., 2021. "The effects of long-term supercritical CO2 exposure on Zululand Basin core samples," Energy, Elsevier, vol. 220(C).
    3. Zhang, Xiaogang & Ranjith, P.G. & Ranathunga, A.S., 2019. "Sub- and super-critical carbon dioxide flow variations in large high-rank coal specimen: An experimental study," Energy, Elsevier, vol. 181(C), pages 148-161.
    4. Perera, M.S.A. & Ranjith, P.G. & Choi, S.K. & Airey, D., 2011. "The effects of sub-critical and super-critical carbon dioxide adsorption-induced coal matrix swelling on the permeability of naturally fractured black coal," Energy, Elsevier, vol. 36(11), pages 6442-6450.
    5. Jiang, Yongdong & Luo, Yahuang & Lu, Yiyu & Qin, Chao & Liu, Hui, 2016. "Effects of supercritical CO2 treatment time, pressure, and temperature on microstructure of shale," Energy, Elsevier, vol. 97(C), pages 173-181.
    6. Cristian R. Medina & Maria Mastalerz & John A. Rupp, 2018. "Pore system characterization of Cambrian‐Ordovician carbonates using a new mercury porosimetry‐based petrofacies classification system: application to carbon sequestration reservoirs," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 8(5), pages 932-953, October.

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