Gel based compositions and their use in selective reduction...

C - Chemistry – Metallurgy – 08 – L

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C08L 81/00 (2006.01) C08K 5/00 (2006.01) C08L 33/26 (2006.01) C08L 35/02 (2006.01) C09K 8/12 (2006.01) C09K 8/24 (2006.01) C09K 8/512 (2006.01) C09K 8/88 (2006.01) E21B 33/138 (2006.01) E21B 43/00 (2006.01)

Patent

CA 2088735

NOUVELLES COMPOSITIONS A BASE DE GELS ET LEUR UTILISATION POUR LA REDUCTION SELECTIVE DE LA PERMEABILITE A L'EAU DANS LES RESERVOIRS CHAUDS ET SALES. Invention de Norbert KOHLER, Ramine RAHBARI et Alain ZAITOUN. precis DE LA DIVULGATION Les compositions gélifiées comprennent au moins un complexe hydrosoluble d'un cation métallique polyvalent choisi parmi Ti, Zr et Hf et d'aumoins un agent complexant choisi dans le groupe formé par les acides monocarboxyliques alpha hydroxylés, les amines aliphatiques, les aminoalcools éventuellement alkylés et l'ion ammonium alkylé capable de réticuler un copolymère ayant la composition suivante: Image où R = H, alkyl, cycloalkyl ou aralkyl, S = SO3M, CO NH C (CH3)2 CH SO3 M, CH2 SO3 M ou phényl-SO3M M = ion alcalin ou alcalino - terreux. Les gels aqueux obtenus sont utilisés préférentiellement pour la réduction sélective de la perméabilité à l'eau dans les réservoirs chauds et salés.

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