Polyalkene oxide preslug for protecting displacement fluids from

Details Polyalkene oxide preslug for protecting displacement fluids from Polyalkene oxide preslug for protecting displacement fluids from

1974-11-25

1976-03-30

Purser, Ernest R.

Wells

Processes

Distinct, separate injection and producing wells

166305R, E21B 4316

Patent

active

039468119

ABSTRACT:
A preslug of polyalkene oxide, e.g., polyethylene oxide, is injected before injection of a displacement fluid, e.g., a micellar dispersion or thickened water, in order to prevent contact between the displacement fluid and polyvalent, e.g., divalent and trivalent ions in the formation water, which ions are detrimental to many displacement fluids.

REFERENCES:
patent: 2233381 (1941-02-01), DeGroote et al.
patent: 3018826 (1962-01-01), Sandiford
patent: 3520365 (1970-07-01), Jones
patent: 3523581 (1970-08-01), Murphy
patent: 3532166 (1970-10-01), Williams
patent: 3580337 (1971-05-01), Gogarty et al.
patent: 3634305 (1972-01-01), Johnson et al.
patent: 3692113 (1972-09-01), Norton et al.
patent: 3783944 (1974-01-01), Jennings et al.
patent: 3804173 (1974-04-01), Jennings
patent: 3882939 (1975-05-01), McAtee et al.
Marathon Oil Technical Disclosure Bulletin, Rhudy, "Delayed Viscous Waterflooding", 12/1970.

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