Speaker
Description
Reliable CO2 storage design in deep geological formations demands a comprehensive understanding of coupled Thermo-Hydro-Mechanical-Chemical (THMC) processes. Using a real depleted chalk reservoir in the Danish North Sea, we demonstrate how these interplays govern injectivity, containment, and long-term integrity. Our multiphysics simulations reveal that cold CO2 injection significantly influences pressure evolution and stress paths, where neglecting mechanical compaction leads to substantial overestimation of storage capacity. Thermal effects, though localized, alter storage capacity, while geochemical interactions remain spatially constrained but critical for caprock sealing over geological timescales. The results underscore that safe and efficient CO2 storage cannot rely on single-physics assumptions; instead, integrated THMC modeling is essential for predicting fault stability, optimizing injection strategies, and ensuring containment. This work provides a validated framework for designing CO2 storage in chalk reservoirs and offers practical guidance for scaling similar approaches to other similar systems, accelerating the deployment of secure subsurface storage as part of global carbon management strategies.
| References | Hosseinzadeh, Behzad, et al. "Validated thermo-hydro-mechanical modeling framework for CO2 storage in chalk reservoirs: A case study from the Harald East field." International Journal of Greenhouse Gas Control 146 (2025): 104426.; Amour, Frédéric, et al. "Accounting for chemical impacts on mechanical properties in coupled simulations of CO2 injection into a depleted chalk field." International Journal of Greenhouse Gas Control 141 (2025): 104324.; Nick, H. M., et al. "Site-Specific Assessment of CO2 Storage Potential in Chalk: The Harald East Experience." SPE, 2025. |
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| Country | Denmark |
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