Method of increasing the yield of hydrocarbons from a...

E - Fixed Constructions – 21 – B

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E21B 43/24 (2006.01) C09K 8/588 (2006.01) C09K 8/592 (2006.01)

Patent

CA 1193186

ABSTRACT OF THE DISCLOSURE Heavy crude oil is recovered from a subterranean formation by a process comprising a) heating said formation, and b) subsequently flooding the formation with a cold aqueous solution containing a polymer additive which increases its viscosity.

419685

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