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Carbon Capture, Utilization, and Storage (CCUS) in tight conglomerate reservoirs is a pivotal strategy for carbon neutrality. However, geochemical interactions under high-temperature and high-pressure (HTHP) conditions remain poorly understood. This study investigates the petrophysical and geo-mechanical evolution of Mahu Sag tight conglomerates through static soaking experiments (30 MPa, 80 °C) and multi-scale characterization. Results indicate that both CO₂-saturated brine and pure formation water significantly enhance reservoir quality. Notably, pure water caused a more dramatic porosity surge due to the rapid leaching of highly soluble halide and sulfate cements. Conversely, CO₂-saturated brine primarily promoted aluminosilicate hydrolysis, expanding flow channels while triggering secondary clay precipitation-a "double-edged sword" for permeability. Geo-mechanical analysis revealed that water-soaked samples suffered severe structural softening, while CO₂-treated samples remained stiffer. By elucidating the differential mechanisms of fluid-rock interactions, this work provides essential theoretical guidance for optimizing CO₂ injection and geological sequestration in heterogeneous tight conglomerate oilfields.
| References | 1. Asante, J.; Ampomah, W.; Tu, J.; Cather, M., (2024). Data-driven modeling for forecasting oil recovery: A time series neural network approach for tertiary CO2 WAG EOR. Geoenergy Science and Engineering. 233: 212555. 2. Zhou, H., Yan, T., Trivedi, J., Wang, B., Zhou, F. (2025) Investigating rock properties and fracture propagation pattern during supercritical CO₂ pre-fracturing in conglomerate reservoir. Advances in Geo-Energy Research, 17(2): 95-106. 3. Bemer, E.; Nguyen, M. T.; Dautriat, J.; Adelinet, M.; Fleury, M.; Youssef, S. (2016). Impact of chemical alteration on the poromechanical properties of carbonate rocks. Geophysical Prospecting, 64, 810-827. 4. Han, X.; Feng, F. P.; Yan, M. S.; Cong, Z. Y.; Liu, S. Y.; Zhang, Y. H. (2022). CO2-Water-Rock Reaction Transport Via Simulation Study of Nanoparticles-CO2 Flooding and Storage. Sustainable Energy Technologies and Assessments, 50, 101736. 5. Li, P.; Yan, J.; Hu, R.; Han, M.; Bai, J. (2025). Impact of dissolution and precipitation on pore structure in CO2 sequestration within tight sandstone reservoirs. Petroleum Science, 22(2), 868-883. 6. Luquot, L., Gouze, P.; Niemi, A., Bensabat, J., Carrera, J. (2016). CO2-Rich brine percolation experiments through Heletz reservoir rock samples (Israel): Role of the flow rate and brine composition. International Journal of Greenhouse Gas Control, 48, 44-58. 7. Wang, Y., Fan, J., Yang, C., He, K., Wang, D. (2024). Effects of Microheterogeneous Wettability and Pore-Throat Structure on Asphaltene Precipitation in Tight Sandstone: Results from Nuclear Magnetic Resonance. ACS Omega, 9(45), 45487-45500. 8. Zhu, H., Xu, T., Tian, H., Feng, G., Yang, Z., Zhou, B. (2019). Understanding of Long-Term CO2-Brine-Rock Geochemical Reactions Using Numerical Modeling and Natural Analogue Study. Geofluids, 2019, 1426061. 9. Zhu, Y., Wu, S., Deng, Y., Liu, L., Lei, X., Niu, Y. (2024). Pore Throat Structures and Fluid Occurrences of Reservoirs in Fengcheng Formation, Mahu Sag. Xinjiang Petroleum Geology, 45(3), 286-295. 10. Tsuyoshi, I., Kazuhei, A., Tomoya, N., Chen, Y., Sumihiko, M., Chen, Q., Yoshiki, N. (2012). Acoustic emission monitoring of hydraulic fracturing laboratory experiment with supercritical and liquid CO2. Geophysical Research Letters, 39(16). 11. Middleton, R. S., Carey, J. W., Currier, R. P., Hyman, J. D., Kang, Q., Karra, S., Viswanathan, H. S. (2015). Shale gas and non-aqueous fracturing fluids: Opportunities and challenges for supercritical CO2. Applied Energy, 147, 500-509. 12. Meng, W., Haizhu, W., Gensheng, L., Bing, Y., Yong, Z., & Qun, L. (2018). Numerical study of proppant transport with supercritical CO2 in fracture. China Petroleum Machinery, 46(11), 72-78. 13. Zhang, X., Lu, Y., Tang, J., Zhou, Z., & Liao, Y. (2017). Experimental study on fracture initiation and propagation in shale using supercritical carbon dioxide fracturing. Fuel, 190, 370-378. 14. Wang, H., Sepehrnoori, K., Li, G., Yang, B., Tian, S., Li, X., & Liu, Q. (2018, June). Effect of supercritical carbon dioxide treatment time, pressure and temperature on mechanical properties of sandstone. In ARMA US Rock Mechanics/Geomechanics Symposium (pp. ARMA-2018). ARMA. 15. Tan, F., Jiang, R., Ma, C., Jing, Y., Chen, K., & Lu, Y. (2025). CO2 oil displacement and geological storage status and prospects. Energy Science & Engineering, 13(2), 475-511. 16. Su, Y., Wang, C., Li, L., Hou, Z., Fan, L., Chen, Z., (2021). Fluid interaction mechanism of CO2 pre-fracturing in tight reservoirs. Science Technology and Engineering, 21(8): 3076-3081. 17. Zhang, J. Z., Wang, J. C., Li, Y., Wang, T., Shi, S. Z., Zhou, H., Wang, B. (2025, June). Research on Mechanism and Parameter Optimization of CO2 Pre-pad Fracturing--Taking the Mahu Conglomerate Reservoir as an Example. In ARMA US Rock Mechanics/Geomechanics Symposium (p. D032S041R023). ARMA. 18. Zhou, H., Yan, T., Ma, C., Wang, B., & Zhou, F. (2025). Characteristics of propped fracture propagation in volcanic clastic reservoirs: a multiscale study of conductivity sustainability and fracture network complexity. Rock Mechanics and Rock Engineering, 1-26. 19. Zhou, H., Wang, B., Zhang, L., Shi, G., Tang, W., Tan, L., Zhou, F. (2024). Quantitative characterization and fracture morphology in reservoirs with various lithologies: An experimental investigation. Geoenergy Science and Engineering, 239, 212911. |
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| Country | china |
| Green Housing & Porous Media Focused Abstracts | This abstract is related to Green Housing |
| Student Awards | I would like to submit this presentation into the Earth Energy Science (EES) and Capillarity Student Poster Awards. |
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