Method for enhanced recovery of oil from oil reservoirs

Details Method for enhanced recovery of oil from oil reservoirs Method for enhanced recovery of oil from oil reservoirs

C - Chemistry, Metallurgy

09

K

C09K 8/588 (2006.01) C09K 8/58 (2006.01) E21B 43/20 (2006.01) E21B 43/22 (2006.01)

Patent

CA 2712568

The present invention provides a method for recovering oil from a subterranean reservoir using waterflooding, wherein the flooding fluid used in the waterflooding process comprises water and one or more of 1,3-propanediol, oligomers of 1,3-propanediol and polymers of 1,3-propanediol. The use of 1,3-propanediol, oligomers and/or polymers thereof is expected to increase the recovery of oil by improving both the oil/water mobility ratio and the sweep efficiency in reservoirs with a high degree of heterogeneity.

La présente invention concerne un procédé pour récupérer du pétrole à partir d'un gisement souterrain à l'aide d'injection d'eau, le fluide d'injection utilisé dans le procédé d'injection d'eau comprenant de l'eau et un ou plusieurs éléments parmi le 1,3-propanediol, des oligomères du 1,3-propanediol et des polymères du 1,3-propanediol. On s'attend à ce que l'utilisation du 1,3-propanediol, d'oligomères et/ou de polymères de celui-ci augmente la récupération de pétrole par amélioration à la fois du rapport des mobilités du pétrole/eau et de l'efficacité de balayage dans des gisements ayant un degré élevé d'hétérogénéité.

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