Khalfallah, InesLoizzo, MatteoLecampion, BriceDennis, Katia2015-09-162015-09-162015-09-162011https://infoscience.epfl.ch/handle/20.500.14299/117949A self-healing cement for use in wells in which carbon dioxide is injected, stored or extracted, comprises a carbonaceous material. In the event of cement-matrix failure, or bonding failure between the cement/casing interface or the cement/borehole-wall interface, the materia! swells when contacted by carbon dioxide. The swelling seals voids in the cement matrix, or along the bonding interfaces, thereby restoring zonal isolation.patentBR112012028422US2013105160AU2011254886EP2404884CA2797283WO201114443342937360