T2013-10-CCUS Swelling

Summary

Results obtained in CATO-2 showed that CO2 causes swelling of certain kinds of clays (smectitic clays) in amounts similar to swelling effects observed in coal.

The project will demonstrate whether or not these effects will render fractures in clay-rich caprocks and fault zones self-sealing to CO2, as seen when CO2 is injected into coal seams, and whether smectitic clay slurries have potential for CO2 leak mitigation.