Orthoester compositions and methods of use in subterranean...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 8/52 (2006.01) E21B 37/06 (2006.01) E21B 43/22 (2006.01)

Patent

CA 2552049

The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for generating acids for use downhole, for example, to at least partially degrade the acid-soluble portions of filter cakes deposited in subterranean formations. In one embodiment, the present invention provides a method of degrading an acid-soluble portion of a filter cake comprising contacting the acid-soluble portion of the filter cake with an acid generated from an orthoester.

La présente invention concerne des procédés et des compositions destinées à traiter des formations souterraines, et, plus particulièrement, des procédés améliorés et des compositions permettant de générer des acides à utiliser en conditions de fond, par exemple, en vue d'une dégradation au moins partielle des parties solubles dans l'acide de gâteaux de filtration déposés dans des formations souterraines. Dans un mode de réalisation, la présente invention concerne un procédé destiné à dégrader une partie soluble dans l'acide d'un gâteau de filtration et consistant à mettre la partie soluble dans l'acide du gâteau de filtration en contact avec un acide généré à partir d'un orthoester.

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