Method of treating a subterranean formation using a rheology...

E - Fixed Constructions – 21 – B

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E21B 43/26 (2006.01) C09K 8/68 (2006.01) E21B 43/267 (2006.01) E21B 49/00 (2006.01)

Patent

CA 2640125

Subterranean formation treatment methods incorporating a rheology model which enables prediction of fluid rheology properties during a treatment operation, where the foundation of the model is a description of the reaction chemistry which describes how the number of crosslinks and broken polymer linkages develops in time under the influence of crosslinkers, breakers, and/or thermally induced effects and pressure effects. In one aspect, when used as a tool for simulating the fluid viscosity, the model can help optimizing the fluid design and optional breaker schedule for a hydraulic fracturing treatment.

L'invention concerne des procédés de traitement d'une formation souterraine qui comprennent un modèle rhéologique permettant de prédire les propriétés rhéologiques d'un fluide pendant une opération de traitement, le modèle reposant sur une description de réactions chimiques qui décrivent le développement dans le temps des réticulations et des liaisons polymères rompues sous l'influence d'agents de réticulation, d'agents réduisant la viscosité et/ou d'effets induits thermiquement et d'effets de pression. Dans un mode de réalisation, lorsqu'on l'utilise comme outil pour simuler la viscosité du fluide, le modèle facilite l'optimisation de la conception du fluide et la planification éventuelle d'agents réduisant la viscosité en vue d'un traitement de fracture hydraulique.

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