E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/25 (2006.01) C08K 5/00 (2006.01) C08L 5/00 (2006.01) C09K 8/08 (2006.01) C09K 8/512 (2006.01) C09K 8/88 (2006.01) E21B 33/138 (2006.01)
Patent
CA 2071218
Novel gel-based compositions used in reducing water inrush in oil or gas-producing wells. The gel-based compositions consist of a solution of at least one hydrosoluble complex of a polyvalent metallic cation such as zirconium lactate capable of crosslinking a non-ionic polysaccharide such as scleroglucane, in a concentration of 2 to 10,000 parts per million parts, expressed by weight of metal dioxide. With a preferred concentration of 2 to 100 ppm, oil permeability is not substantially affected. The compositions form aqueous scleroglucane gels for use in preventing water inrush in hydrocarbon producing wells.
L'invention a pour objet l'utilisation de nouvelles compositions de gels utilisables pour la réduction de la production d'eau dans les puits producteurs d'huile ou de gaz. Les compositions de gels comprennent une solution d'au moins un complexe hydrosoluble d'un cation métallique polyvalent comme le lactate de zirconium capable de réticuler un polysaccharide non ionique tel que le scléroglucane; à une concentration de 2 à 10 000 parties par million de parties, exprimée en poids de dioxyde de métal. Avec une concentration préférée de 2 à 100 ppm, la perméabilité à l'huile n'est sensiblement pas affectée. Les compositions permettent la formation de gels aqueux de scléroglucane utilisables peur la prévention des venues d'eau dans les puits de production d'hydrocarbures.
Kohler Norbert
Pirri Rosangela
Institut Francais Du Petrole
Robic
LandOfFree
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