Well treatment with complexed metal crosslinkers

Details Well treatment with complexed metal crosslinkers Well treatment with complexed metal crosslinkers

E - Fixed Constructions

21

B

E21B 43/26 (2006.01) C09K 8/68 (2006.01)

Patent

CA 2686779

Disclosed are compositions and methods for treating subterranean formations, in particular, oilfield stimulation compositions and methods using polymer viscosified fluid crosslinked with metal complexes with amino and/or phosphonic acids to provide an increased crosslinking temperature and a low pH sensitivity. The metal complexes can be used with borate crosslinkers to provide continuous viscosification as the temperature is increased.

L'invention concerne des compositions et des procédés pour traiter des formations souterraines, en particulier, des compositions de stimulation de champ pétrolifère et des procédés utilisant un fluide viscosifié par un polymère, réticulé par des complexes métalliques avec des acides aminés et/ou phosphoniques pour fournir une température de réticulation augmentée et une faible sensibilité au pH. Les complexes métalliques peuvent être utilisés avec des réticulants de type borate pour fournir une viscosification continue à mesure que la température est augmentée.

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