Zirconium cross-linking composition and methods of use

Details Zirconium cross-linking composition and methods of use Zirconium cross-linking composition and methods of use

C - Chemistry, Metallurgy

09

K

C09K 8/68 (2006.01) C09K 8/44 (2006.01) C09K 8/512 (2006.01) E21B 33/13 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2642257

A cross-linking composition comprises a zirconium triethanolamine complex, a tetra(hydroxyalkyl)ethylenediamine, water and optionally, a polyol. The composition can be used for cross-linking organic polymers over a wide range of pH. By varying the composition and optionally adding a delay agent, the composition provides flexibility in rate of cross-linking. Further disclosed are methods to use the composition further comprising a cross-linkable organic polymer in oil field applications for hydraulic fracturing and plugging of permeable zones and leaks in subterranean formations.

L'invention concerne une composition de réticulation comprenant un complexe de zirconium et triéthanolamine, une tétra(hydroxyalkyl)éthylène diamine, de l'eau et le cas échéant un polyol. Cette composition peut être utilisée pour réticuler des polymères organiques dans une plage de pH étendue. En faisant varier la composition et le cas échéant en ajoutant un agent retardateur, la composition apporte une souplesse au niveau de la vitesse de réticulation. L'invention concerne également des procédés d'utilisation de la composition comprenant en plus un polymère organique réticulable dans des applications pétrolières pour la fracturation hydraulique et pour le colmatage de zones perméables et de fuites dans des formations souterraines.

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