1,2,2- 1The University of Glasgow, James Watt School of Engineering, Glasgow, United Kingdom of Great Britain – England, Scotland, Wales (julien.mouli-castillo@glasgow.ac.uk)
- 2The University of Glasgow, School of Physics and Astronomy, Glasgow, United Kingdom of Great Britain - England, Scotland, Wales
Geological storage is critical for energy systems because it provides large-scale, long-duration storage that stabilises supply and demand through time. It also supports the integration of variable renewables. Technologies such as CAES, UHS, and CO2 storage use subsurface formations to enhance energy security, grid flexibility, and decarbonization, while making efficient use of existing geological resources and infrastructure.
A critical aspect is the ability to monitor the system for leaks. This has significant implications for liability and environmental compliance.
In this work, we developed a comparative numerical leakage model for CAES, UHS, and CO2. This allows for a like for like comparison of the gravity signal from a surface monitoring array. We explore the importance of depth and find important detectability differences between the different gases. These models could be used to benchmark other monitoring methods.
How to cite: Mouli-Castillo, J., Prasad, A., and Aftalion, M.: Assessing the performance of gravity monitoring for CAES, UHS, and CCS: A comparative study, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-12219, https://doi.org/10.5194/egusphere-egu26-12219, 2026.
