Recovering oil by injecting ammoniated and nitrited seawater

Details Recovering oil by injecting ammoniated and nitrited seawater Recovering oil by injecting ammoniated and nitrited seawater

1985-08-22

1986-11-04

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166273, 166274, E21B 4322, E21B 4320

Patent

active

046205950

ABSTRACT:
An improved floodwater for oil recovery comprises seawater which is free of undesirable proportions of bacteria, solids and oxygen, has a pH at least near, but not more than, about 9.5, and contains a minor amount of ammonium and nitrite ions and, optionally, surfactant, effective for increasing its capability of displacing oil.

REFERENCES:
patent: 2813583 (1957-11-01), Marx et al.
patent: 2839467 (1958-06-01), Hutchinson
patent: 2843545 (1958-07-01), Wolf
patent: 3101781 (1963-08-01), Connally
patent: 3464492 (1969-09-01), Friedman
patent: 3625888 (1971-12-01), Redmore
patent: 4399868 (1983-08-01), Richardson et al.
patent: 4406327 (1983-09-01), Fair et al.
patent: 4515701 (1985-05-01), Hoskin
patent: 4527626 (1985-07-01), Cantu et al.

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