Methods for controlling the rheological properties of...

Details Methods for controlling the rheological properties of... Methods for controlling the rheological properties of...

E - Fixed Constructions

21

B

E21B 43/25 (2006.01) C09K 8/584 (2006.01) C09K 8/68 (2006.01)

Patent

CA 2510241

It was found that the addition of polymers to viscoelastic surfactant base system allows to adjust the rheological properties of the base fluid. Depending in particular on one side of the ratio of the concentration of added polymer and the concen-tration of viscoelastic surfactant and on the other side of the molecular weight of the added polymer, the same polymer - or the same type of polymer - may perform different functions such as viscosity enhancer, viscosity breaker or viscosity-recovery enhancer.

Il a été découvert que l'ajout de polymères à un système à base de tensioactifs viscoélastiques permet d'ajuster les propriétés rhéologiques du fluide de base. En fonction, notamment, du rapport de la concentration de polymère ajouté sur la concentration de tensioactif viscoélastique, d'une part, et du poids moléculaire du polymère ajouté, d'autre part, le même polymère ou le même type de polymère peut remplir différentes fonctions, telles que des fonctions d'augmentation de viscosité, de réduction de viscosité ou facilitant la recouvrance de viscosité.

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