System stabilizers and performance enhancers for aqueous...

Details System stabilizers and performance enhancers for aqueous... System stabilizers and performance enhancers for aqueous...

E - Fixed Constructions

21

B

E21B 43/26 (2006.01) E21B 43/25 (2006.01) E21B 43/27 (2006.01)

Patent

CA 2566449

An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is stabilized and improved with an effective amount of an alkall earth metal oxide and/or alkall earth metal hydroxide. These fluids are more stable and have reduced or no tendency to precipitate, particularly at elevated temperatures. The additives may also increase viscosity to the point where less VES is required to maintain a given viscosity. These stabilized, enhanced, aqueous, viscoelastic fluids may be used as treatment fluids for subterranean hydrocarbon formations, such as in hydraulic fracturing.

Un fluide viscoélastique aqueux, gélifié avec un agent tensioactif viscoélastique (VES) est stabilisé et amélioré par ajout d'une quantité efficace d'un oxyde d'un métal alcalinoterreux et/ou d'un hydroxyde d'un métal alcalinoterreux. Ces fluides sont plus stables et ont une tendance réduite, voire, aucune tendance à précipiter, en particulier aux températures élevées. Les additifs peuvent également accroître la viscosité de manière telle qu'une quantité moindre de VES est requise pour maintenir une viscosité déterminée. Ces fluides viscoélastiques aqueux, stabilisés, optimisés, peuvent être utilisés comme fluides de traitement de formations hydrocarbonées souterraines, par exemple, en fracturation hydraulique.

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