Wells – Processes – Distinct – separate injection and producing wells
Patent
1980-03-17
1982-08-17
Guynn, Herbert B.
Wells
Processes
Distinct, separate injection and producing wells
166273, 252 855D, E21B 4322
Patent
active
043444873
ABSTRACT:
A process for producing petroleum from subterranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an injection well to a production well. The process involves injecting via the injection well into the formation an aqueous solution of modified lignosulfonate salt as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. The process may best be carried out by injecting the modified lignosulfonates into the formation through the injection well mixed with either a polymer, a surfactant solution and/or a micellar dispersion. This mixture would then be followed by a drive fluid such as water to push the chemicals to the production well. The lignosulfonates may be modified by any combination of any two or more of: reaction with chloroacetic acid, reaction with carbon dioxide, addition of the methylene sulfonate radical to the lignosulfonate molecule and oxidation with oxygen.
REFERENCES:
patent: 3384171 (1968-05-01), Parker
patent: 3469630 (1969-09-01), Hurd
patent: 3700031 (1972-10-01), Germer et al.
patent: 3797574 (1974-03-01), Feuerbacher et al.
patent: 3841887 (1974-10-01), Falkehag et al.
Guynn Herbert B.
Priem Kenneth R.
Ries Carl G.
Texaco Inc.
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