Recovery of Oil
AssigneeOilflow Solutions Holdings Limited
InventorsPhilip Fletcher, Jeffrey Forsyth, Cory Jaska
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Abstract
A treatment formulation for use in enhanced oil recovery is described which includes a dispersing polymer which may be a partly hydrolyzed polyvinyl alcohol and a displacing polymer which may be a partially hydrolysed polyacrylamide.
Claims36
A method of recovering oil from a subterranean formation, the method including the step of:
- (a) contacting the subterranean formation with a treatment formulation comprising a displacing polymer and a dispersing polymer;
- and
- (b) collecting oil which has been contacted with said treatment formulation via a production well.
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A treatment formulation comprising a displacing polymer, a dispersing polymer and water wherein said displacing polymer includes an acrylamide repeat unit and said dispersing polymer includes vinylalcohol and vinylacetate repeat units, said treatment formulation includes:
- 100 ppm to 30000 ppm displacing polymer
- 500 ppm to 10000 ppm dispersing polymer.
Dependencies are inferred from the claim text.