Use of materials as waterflood additives

Details Use of materials as waterflood additives Use of materials as waterflood additives

1975-03-12

1976-03-30

Murtagh, John E.

Wells

Processes

Distinct, separate injection and producing wells

166273, E21B 4322

Patent

active

039468127

ABSTRACT:
One embodiment includes an oil recovery process, more particularly a secondary or tertiary type crude oil recovery process utilizing a drive fluid to move a displacing fluid through a subterranean formation wherein the displacing fluid displaces crude oil therefrom and is driven through the formation by means of the drive fluid. The crude oil recovery process is improved by utilizing as the drive fluid a thickened, transparent, aqueous solution of a water-soluble sulfated, polyethoxylated C.sub.10 -C.sub.18 primary alcohol or alkylated phenol. The displacing fluid is generally an aqueous surfactant solution, a miscible displacing medium or most preferably a microemulsion. In a further embodiment, the water-soluble, polyethoxylated C.sub.10 -C.sub.18 primary alcohol or alkylated phenol is employed as a mobility control agent in a waterflood thereby increasing the sweep efficiency thereof.

REFERENCES:
patent: 3500923 (1970-03-01), Reisberg
patent: 3638728 (1972-02-01), Hill
patent: 3712377 (1973-01-01), Hill et al.
patent: 3768560 (1973-10-01), Hill et al.
patent: 3827497 (1974-08-01), Dycus et al.

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