C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 39/06 (2006.01) C08K 3/36 (2006.01) C08L 39/04 (2006.01) C09K 8/04 (2006.01) C09K 8/588 (2006.01)
Patent
CA 2319045
The present invention provides a water-based fluid, in particular for drilling, completion or for any other intervention in a well such as a hydrocarbon well, in which the viscosity is controlled by a system constituted by precipitated silica nanoparticles (A) associated with a water-soluble copolymer (B) comprising one or more water-soluble co-monomers (I) having little or no affinity for silica and one or more co-monomers (II) which adsorb onto the silica. The invention is of particular application to the secondary recovery of hydrocarbons.
L'invention porte sur un fluide aqueux servant en particulier au forage d'un puits, à la finition ou à toute autre intervention dans un puits notamment d'hydrocarbures, dont la viscosité dépend d'un système constitué de nanoparticules d'un précipité de silice (A) associé à un copolymère hydrosoluble (B) composé d'un ou plusieurs comonomères (I) présentant peu ou pas d'affinité pour la silice et d'un ou plusieurs comonomères (II) adsorbés par la silice. L'invention s'applique en particulier à la récupération secondaire d'hydrocarbures.
Lafuma Francoise
Maroy Pierre
Simonet Coralie
Schlumberger Canada Limited
Smart & Biggar
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