Waterflood method using overbased normal alkylaromatic sulfonate

Details Waterflood method using overbased normal alkylaromatic sulfonate Waterflood method using overbased normal alkylaromatic sulfonate

1974-09-30

1976-06-29

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166274, 252 855D, E21B 4322

Patent

active

039659844

ABSTRACT:
An improved anionic waterflood additive is prepared by partially chlorinating a normal alkane having about 10 to about 18 carbon atoms to about 2 to about 15 weight percent chlorine content, employing the chlorinated alkane to alkylate an aromatic hydrocarbon, such as benzene; sulfonating the thus formed alkylate or a fraction thereof to form a sulfonic acid; converting the sulfonic acid to a sulfonate by reacting with a base component, such as an alkali metal hydroxide, ammonium hydroxide, or an alkali metal carbonate; and overbasing the sulfonate by admixing with an excess of base component such that the ratio: "weight of excess base component/weight of sulfonate" is about 0.03 to about 3.0. The anionic waterflood additive is injected into a petroliferous formation, the formation is waterflooded, and oil is recovered.

REFERENCES:
patent: 3111984 (1963-11-01), Reisberg
patent: 3302711 (1967-02-01), Dilgren
patent: 3302713 (1967-02-01), Ahearn et al.
patent: 3316294 (1967-04-01), Feighner et al.
patent: 3330347 (1967-07-01), Brown et al.
patent: 3348611 (1967-10-01), Reisberg
patent: 3804170 (1974-04-01), Krehbiel et al.
patent: 3804171 (1974-04-01), Krehbiel et al.
patent: 3865735 (1975-02-01), Clark et al.

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