Viscous fluid applicable for treating subterranean formations

Details Viscous fluid applicable for treating subterranean formations Viscous fluid applicable for treating subterranean formations

E - Fixed Constructions

21

B

E21B 43/26 (2006.01) C09K 8/62 (2006.01)

Patent

CA 2398610

A viscous fluid is shown which is useful in treating subterranean formations. The fluid is formulated from an aqueous base, an alkyl sarcosinate surfactant and a buffer suitable for adjusting the pH for the blended fluid to a range in which the fluid is suitably viscosified. The fluid can also include an additional source of anions, such as chloride or fluoride ions, in order to increase the temperature stability of the fluid. The fluids have application fo conventional well fracturing, coiled tubing fracturing, gravel packing and frac packing, as well as for use as selective water control additives and other applications.

L'invention concerne un fluide visqueux permettant de traiter des formations souterraines. Ce fluide est formulé à partir d'une base aqueuse, d'un tensioactif à base d'un alkyle sarcosinate et un tampon permettant d'ajuster le pH du fluide mélangé selon un degré auquel le fluide est convenablement rendu visqueux. Ce fluide peut également comprendre une source additionnelle d'anions, telle que des ions de chlorure ou de fluorure, afin d'augmenter la stabilité de la température du fluide. Ces fluides trouvent des applications dans la fracturation classique de puits, dans la fracturation par serpentins, dans le gravillonnage des crépines et dans le garnissage de fracturation et peuvent également servir d'additifs de régularisation des eaux et pour d'autres applications.

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