Method and composition for reducing the permeability of a...

E - Fixed Constructions – 21 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

31/26

E21B 43/22 (2006.01) C09K 8/512 (2006.01) C09K 8/88 (2006.01)

Patent

CA 2013468

A method for reducing the permeability of a high-permeability zone in a high-temperature oil reservoir comprises: - preparing a gellable polymeric aqueous solution, operating on the surface under controlled conditions; - injecting said gellable solution into the oil reservoir through a well; - moving the solution through the reservoir until it reaches and substantially fills the high-permeability zone to be treated; and - gelling the solution in situ with consequent lowering of the permeability in said high-permeability zone, and is essentially characterised in that the gellable solution is an aqueous solution containing a Cr(III) ion cross-linking agent and a water-soluble organic polymer cross-linkable by the effect of said cross-linking agent, said solution being free or substantially free of ligands for the cross-linking agent and having a pH adjusted to a value within the range of 1.5 to 5.5, depending on the desired gelling time.

Méthode pour réduire la perméabilité d'une zone très perméable dans un gisement d'hydrocarbures à haute température, consistant à : préparer une solution polymérique aqueuse gélifiable, agissant en surface dans des conditions déterminées; injecter cette solution gélifiable dans le réservoir d'hydrocarbures via un puits; déplacer la solution à travers le réservoir jusqu'à ce qu'elle atteigne et remplisse en grande partie la zone fortement perméable à traiter; gélifier la solution sur place de façon à réduire la perméabilité dans cette zone. La méthode se caractérise par le fait que la solution gélifiable est une solution aqueuse renfermant un ion de Cr(III), agent de réticulation, et un polymère organique hydrosoluble réticulable par cet agent; la solution est pratiquement ou totalement exempte de ligands pour l'agent de réticulation et possède un pH ajustable à une valeur de 1,5 à 5,5 selon la durée de gélification voulue.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method and composition for reducing the permeability of a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and composition for reducing the permeability of a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and composition for reducing the permeability of a... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1926895

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.