Restricting fluid passage and novel materials therefor

Details Restricting fluid passage and novel materials therefor Restricting fluid passage and novel materials therefor

E - Fixed Constructions

21

B

E21B 33/138 (2006.01)

Patent

CA 2519738

Water problems in the production of oil or gas from subterranean formations is addressed by providing a method of restricting passage of a fluid from a first location to a second location in a subterranean formation by injecting into the formation a formulation comprising a first material, for example a dialdehyde, arranged to cross-link a second polymeric material, for example a polyvinyl alcohol, thereby to form a polymeric material of high viscosity which may block the passage between the first and second locations.

Selon l'invention, les problèmes d'eau dans la production de pétrole ou de gaz à partir de formations souterraines peuvent être résolus par un procédé consistant à restreindre le passage d'un fluide d'un premier point à un second point d'une formation souterraine par injection dans ladite formation d'une formulation comprenant une première matière, par exemple un dialdéhyde, destinée à réticuler une seconde matière polymère, par exemple un alcool polyvinylique, de façon à former une matière polymère à grande viscosité pouvant bloquer le passage entre le premier et le second point.

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