Wells – Processes – Placing fluid into the formation
Patent
1975-03-26
1976-03-23
Novosad, Stephen J.
Wells
Processes
Placing fluid into the formation
166275, 252 855D, E21B 4322
Patent
active
039454371
ABSTRACT:
The properties of an aqueous surfactant system for displacing oil within a permeable medium are improved by adding an aromatic ether polysulfonate to the system. This improves the tolerance of the system toward salts of monovalent and/or multivalent cations, and also causes emulsions formed between the oil and the oil-displacing system to be less viscous and less stable.
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Chiu Ying-Chech
Hill Harold J.
Novosad Stephen J.
Shell Oil Company
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