Polymer-microemulsion complexes and use for the enhanced...

Details Polymer-microemulsion complexes and use for the enhanced... Polymer-microemulsion complexes and use for the enhanced...

E - Fixed Constructions

21

B

31/13

E21B 43/22 (2006.01) B01F 17/00 (2006.01) C08J 3/09 (2006.01) C09K 8/588 (2006.01)

Patent

CA 1142742

ABSTRACT OF THE DISCLOSURE A polymer-microemulsion complex useful for the enhanced recovery of crude oil is disclosed. The poly- mer is polyethylene oxide or polyvinyl pyrrolidone and interacts with the surfactant of the microemulsion to form a physical association. The resulting complex is characterized by a complexation energy of at least 2 Kcal/mole. The polymer microemulsion complexes are stable at high salinity, reduce adsorption and reten- tion by the formation, lower interfacial tension, achieve retentions as low as 0.1 mg surfactant/gm sand at high salinity and provide for early banking, as well as high recovery of oil. Enhanced oil recovery fluids using the polymer microemulsion complexes exhibit similar properties.

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