1
Thomas V Harris, Cyrus A Irani, Wayne R Pretzer: Enhanced oil recovery using CO.sub.2 flooding. Chevron Research Company, Edward J Keeling, Ernest A Schaal, April 3, 1990: US04913235 (27 worldwide citation)

A method of increasing the viscosity of CO.sub.2 at least three-fold by adding (1) a viscosifying amount of a polymer having a Minimum Solubility Parameter of 6.85 or less and a plurality of electron donor atoms selected from the group consisting of O, N, and S, and (2) a sufficient amount of a coso ...


2
Cyrus A Irani, Thomas V Harris, Wayne R Pretzer: Polymer containing pendant tertiary alkyl amine groups useful in enhanced oil recovery using CO.sub.2 flooding. Chevron Research Company, E J Keeling, E A Schaal, August 7, 1990: US04945989 (10 worldwide citation)

A polymer having pendant tertiary alkyl amine groups is disclosed having a minimum solubility parameter of 6.85 (cal/cc).sup.1/2 or less. That minimum solubility parameter is reduced to 6.85 (cal/cc).sup.1/2 or less by control of the number of pendant tertiary alkyl amine groups and by the selection ...


3
Cyrus A Irani, Thomas V Harris, Wayne R Pretzer: Polymer containing pendant vinyl ether groups useful in enhanced oil recovery using CO.sub.2 flooding. Chevron Research Company, Edward J Keeling, Ernest A Schaal, August 7, 1990: US04945990 (7 worldwide citation)

A polymer having pendant vinyl ether groups is disclosed having a minimum solubility parameter of 6.85 (cal/cc).sup.1/2 or less. That minimum solubility parameter is reduced to 6.85 (cal/cc).sup.1/2 or less by control of the number of pendant vinyl ether groups and by the selection of said vinyl eth ...


4
Cyrus A Irani, Thomas V Harris, Wayne R Pretzer: Polymer containing pendant silyl ether groups useful in enhanced oil recovery using CO.sub.2 flooding. Chevron Research Company, Edward J Keeling, Ernest A Schaal, June 11, 1991: US05022467 (4 worldwide citation)

A polymer having pendant silyl ether groups is disclosed having a minimum solubility parameter of 6.85 (cal/cc).sup.1/2 or less. That minimum solubility parameter is reduced to 6.85 (cal/cc).sup.1/2 or less by control of the number of pendant silyl ether groups and by the selection of said silyl eth ...