Secondary and tertiary oil recovery process

Details Secondary and tertiary oil recovery process Secondary and tertiary oil recovery process

E - Fixed Constructions

21

B

31/22

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

Patent

CA 1052085

ABSTRACT OF THE DISCLOSURE Improved secondary and tertiary oil recovery process in which water-soluble, salt-insensitive, block polymers of the A-B-A type wherein the A block is derived from a water-soluble monomer and the B block is derived from N-vinyl pyrrolidone are used as viscosity control agents.

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