Composition and method for treating a subterranean formation

Details Composition and method for treating a subterranean formation Composition and method for treating a subterranean formation

C - Chemistry, Metallurgy

09

K

C09K 8/68 (2006.01) C09K 8/52 (2006.01)

Patent

CA 2587430

A method of treating a subterranean formation with a retarded self- diverting fluid system The method includes contacting the formation with a mixture of acid, chelating agent, and betaine surfactant in which the betaine surfactant is mixed with an aqueous solution of the chelating agent in which the pH has been adjusted to a pH of below about 3.0, but above the pH at which the free acid of the chelating agent precipitates, and the resulting fluid system is utilized for both acid fracturing and matrix stimulation, as well as workover procedures such as scale and filter cake removal, especially in high temperature formations.

L'invention concerne un procédé de traitement d'une formation souterraine au moyen d'un système de fluides à auto-dérivation retardé. Ce procédé consiste à mettre la formation en contact avec un mélange d'acide, d'agent chélateur et de tensioactif de bétaïne, dans lequel le tensioactif de bétaïne est mélangé à une solution aqueuse de l'agent chélateur dans lequel le pH a été ajusté à un pH situé en dessous d'environ 3, mais au dessus du pH auquel l'acide libre de l'agent chélateur précipite. Le système de fluides résultant est utilisé à la fois pour la fracturation à l'acide et la stimulation matricielle, ainsi que dans des procédures de reconditionnement, telles que l'élimination des écailles et du gâteau de filtration, en particulier dans des formations à température élevée.

Affiliated with

Also associated with

Rating

Composition and method for treating a subterranean formation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Composition and method for treating a subterranean formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composition and method for treating a subterranean formation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1690053