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Reactive Transport Modeling and Sensitivity Analysis of CO 2 –Rock–Brine Interactions at Ebeity Reservoir, West Kazakhstan

Author

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  • Nurlan Seisenbayev

    (Department of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan)

  • Miriam Absalyamova

    (Department of Chemical and Material Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan)

  • Alisher Alibekov

    (Department of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan)

  • Woojin Lee

    (Department of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan
    Laboratory of Environmental Systems, National Laboratory Astana, Astana 010000, Kazakhstan)

Abstract

This study investigated the reactive transport modeling of CO 2 injection into the Kazakhstan reservoir to identify mineralogical and porosity changes due to geochemical reactions. Additionally, sensitivity analysis was performed to test the effect of the surface area and gas impurity on the CO 2 storage capability. Despite the current need to investigate carbon sequestration in Kazakhstan, a limited number of studies have been conducted in this field. The Ebeity oil reservoir sandstone formation in the Pre-Caspian Basin has been tested as a potential CO 2 storage site. The 1D PHREEQC simulation results of 10,000 years suggest that reservoirs with a higher abundance of these secondary carbonates may be better suited for long-term CO 2 sequestration. The concentration of Fe 3+ fluctuated, influenced by magnetite and siderite dissolution, leading to ankerite precipitation at 20 and 40 m. The porosity increased from 15% to 18.2% at 1 m and 20 m, favoring a higher CO 2 storage capacity, while at 40 m, it remained stable due to minor mineral alterations. A reduced surface area significantly limits the formation of dawsonite, a crucial secondary mineral for CO 2 trapping. For instance, at λ = 0.001, dawsonite formation dropped to 6 mol/kgw compared to 24 mol/kgw at λ = 1. Overall, the results of this study can play an essential role in future geological analyses to develop CO 2 storage in Kazakhstan for nearby reservoirs with similar geological characteristics.

Suggested Citation

  • Nurlan Seisenbayev & Miriam Absalyamova & Alisher Alibekov & Woojin Lee, 2023. "Reactive Transport Modeling and Sensitivity Analysis of CO 2 –Rock–Brine Interactions at Ebeity Reservoir, West Kazakhstan," Sustainability, MDPI, vol. 15(19), pages 1-22, October.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:19:p:14434-:d:1252746
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    References listed on IDEAS

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    1. Aiymgul Kerimray & Kanat Baigarin & Rocco De Miglio & Giancarlo Tosato, 2016. "Climate change mitigation scenarios and policies and measures: the case of Kazakhstan," Climate Policy, Taylor & Francis Journals, vol. 16(3), pages 332-352, April.
    2. Babak Shabani & Peng Lu & Ryan Kammer & Chen Zhu, 2022. "Effects of Hydrogeological Heterogeneity on CO 2 Migration and Mineral Trapping: 3D Reactive Transport Modeling of Geological CO 2 Storage in the Mt. Simon Sandstone, Indiana, USA," Energies, MDPI, vol. 15(6), pages 1-30, March.
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