Method for recovery of acidic crude oils

Details Method for recovery of acidic crude oils Method for recovery of acidic crude oils

1974-12-26

1976-11-30

Faw, Jr., Price C.

Wells

Processes

Distinct, separate injection and producing wells

166274, E21B 4320, E21B 4322

Patent

active

039943445

ABSTRACT:
Aqueous solutions comprising polyethylenimine as the active ingredient thereof are injected into an underground formation having an acidic crude oil therein. The polyethylenimine reacts with the nonhydrocarbon constituents in the crude oil to form a surface-active material. The surfactant emulsifies in the oil to form a grease-like barrier layer, and the crude may then be pushed by a suitable pushing agent such as water or viscous water from behind the grease barrier, to a producing well from where the crude oil is produced.

REFERENCES:
patent: 2954825 (1960-10-01), Bernard
patent: 3047062 (1962-07-01), Meadors
patent: 3111984 (1963-11-01), Reisberg
patent: 3174542 (1965-03-01), Reisberg
patent: 3330347 (1967-07-01), Brown et al.
patent: 3344858 (1967-10-01), Gilchrist et al.
patent: 3347789 (1967-10-01), Dickson et al.
patent: 3464492 (1969-09-01), Friedman
patent: 3472319 (1969-10-01), McAuliffe

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