CO2 Trapping Paths
Geologic Carbon Storage
"CO2 is stored through four trapping mechanisms. These mechanisms occur simultaneously on injection within the pore space of a storage reservoir; however, the importance of each trapping mechanism – physical, residual, dissolution, mineralisation – changes with time and with the CO2 plume's evolution. Trapping of CO2 is strongly dependent on a site’s geology and local formation conditions (fluids, pressure, temperature)."
- Global CCS Institute (2021 Report)
PoreStore
At the Kelly Lab, we look at the CO2 trapping paths (storage versus time per mechanism) for different rock types* and how they are impacted by the following variables:
- Heterogeneity
- Composition (mineralogy, organic matter)
- Pore size distribution
- Flow rate and capillary number
- Water saturation (Sw) and brine composition
- Surface area to volume ratios
- Temperature, pressure
*tight (nanoporous) mudrocks and basalts to porous sandstones, scope depends on subproject
