Delayed crosslinking agents for high-temperature fracturing

Details Delayed crosslinking agents for high-temperature fracturing Delayed crosslinking agents for high-temperature fracturing

C - Chemistry, Metallurgy

09

K

C09K 8/68 (2006.01)

Patent

CA 2734377

Treatment fluids comprising gelling agents and high-temperature, delayed crosslinkers, and methods of use in subterranean operations, are provided. In one embodiment, a method of treating a subterranean formation includes providing a treatment fluid comprising an aqueous base fluid; a gelling agent comprising terpolymer of 2-acrylamido-2-methylpropane sulfonic acid, acrylamide, and acrylic acid or a salt thereof; and a crosslinking agent comprising at least one component selected from the group consisting of zirconyl chloride and zirconium sulfate; and introducing the treatment fluid into a subterranean formation.

L'invention porte sur des fluides de traitement comprenant des agents gélifiants et des réticulants à action retardeé, à haute température, et sur des procédés d'utilisation dans des opérations souterraines. Dans un mode de réalisation, l'invention porte sur un procédé de traitement d'une formation souterraine qui comprend les opérations consistant à se procurer un fluide de traitement comprenant un fluide à base aqueuse; un agent gélifiant comprenant un terpolymère d'acide 2-acrylamido-2-méthylpropane sulfonique, d'acrylamide et d'acide acrylique ou un sel de celui-ci; et un agent réticulant comprenant au moins un composant choisi dans le groupe constitué par le chlorure de zirconyle et le sulfate de zirconium; et à introduire le fluide de traitement dans une formation souterraine.

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