Methods of treating subterranean wells using changeable...

E - Fixed Constructions – 21 – B

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E21B 43/22 (2006.01)

Patent

CA 2708220

Fluid compositions and methods of making and using same are described, one composition comprising a well treatment fluid and an additive combined with the well treatment fluid, wherein the additive is selected from solids, liquids and combinations thereof, the additive having a surface shape, at least one property of the surface shape enabling it to change under influence of a controllable parameter after the composition is deployed into a hydraulic fracture or gravel pack. In methods of the disclosure, the additive exists initially in a first state, and then is changed to a second state. The first state may increase proppant flowback efficiency, while the second state may increase hydraulic conductivity. In certain embodiments, the additive may change back to its first state.

L'invention concerne des compositions fluidiques et des procédés de fabrication et d'utilisation de celles-ci. Une composition contient un fluide de traitement de puits et un additif combiné au fluide de traitement de puits, l'additif étant sélectionné parmi les solides, les liquides et des combinaisons de ceux-ci. L'additif présente une forme de surface, au moins une propriété de la forme de surface lui permettant de changer sous l'influence d'un paramètre réglable après le déploiement de la composition dans une fracture hydraulique ou un filtre à graviers. Dans les procédés de l'invention, l'additif présente initialement un premier état, puis est modifié et présente un second état. Le premier état permet d'augmenter l'efficacité de retour de l'agent de soutènement, tandis que le second état permet d'augmenter la conductivité hydraulique. Dans certains modes de réalisation, l'additif peut retourner à son état initial.

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