C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 33/26 (2006.01) C08J 3/24 (2006.01) C08K 5/103 (2006.01) C09K 8/588 (2006.01) E21B 43/22 (2006.01)
Patent
CA 2721973
This invention is directed to a composition comprising expandable polymeric microparticles comprising an interpenetrating polymer network (IPN). The IPN constrains the microparticle to an unexpanded volume average particle size diameter of from about 0.05 to about 5,000 microns. Labile cross-links in the polymers of the IPN are subject to degradation, which results in release of the expandable microparticle so that the microparticle expands. The invention is further directed to the use of the composition for modifying the permeability of subterranean formations and increasing the mobilization and/or recovery rate of hydrocarbon fluids present in the formations.
La présente invention concerne une composition comprenant des microparticules polymères expansibles comprenant un réseau polymère interpénétrant (IPN). L'IPN limite la microparticule à un diamètre particulaire moyen de volume non expansible allant d'environ 0,05 à environ 5 000 microns. Les liaisons réticulaires labiles dans les polymères de l'IPN sont soumises à une dégradation, qui résulte en la libération de la microparticule expansible de sorte que la microparticule se gonfle. L'invention concerne en outre l'utilisation de la composition pour modifier la perméabilité de formations souterraines et augmenter le taux de mobilisation et/ou de récupération d'hydrocarbures fluides présents dans les formations.
Chang Kin-Tai
Reed Peter E.
Borden Ladner Gervais Llp
Nalco Company
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