Wells – Processes – Distinct – separate injection and producing wells
Patent
1977-12-12
1979-04-03
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166275, E21B 4322
Patent
active
041472144
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 tannin 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 tannin into the formation through the injection well ahead of or 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.
REFERENCES:
patent: 3160205 (1964-12-01), Harvey et al.
patent: 3384171 (1968-05-01), Parker
patent: 3437141 (1969-04-01), Brandner et al.
patent: 3469630 (1969-09-01), Hurd et al.
patent: 4005749 (1977-02-01), Birk et al.
patent: 4006779 (1977-02-01), Kalfoglou
patent: 4072192 (1978-02-01), Kudchadker
Novosad Stephen J.
Priem Kenneth R.
Ries Carl G.
Texaco Inc.
Whaley Thomas H.
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