Compositions and methods for well treatment
A 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.
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Alternative title(s) : (de) Zusammensetzungen und verfahren zur bohrlochbehandlung (fr) Compositions et procédés pour le traitement de puits
Patent number | Country code | Kind code | Date issued |
BR112012028422 | BR | A2 | 2016-11-16 |
US2013105160 | US | A1 | 2013-05-02 |
AU2011254886 | AU | A1 | 2012-11-15 |
EP2404884 | EP | A1 | 2012-01-11 |
CA2797283 | CA | A1 | 2011-11-24 |
WO2011144433 | WO | A1 | 2011-11-24 |