Process for enhanced oil recovery employing petroleum sulfonates

Details Process for enhanced oil recovery employing petroleum sulfonates Process for enhanced oil recovery employing petroleum sulfonates

1979-07-02

1981-02-24

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

166275, 252 855D, 252353, E21B 4322

Patent

active

042521920

ABSTRACT:
Petroleum sulfonates yielding improved results in enhanced oil recovery processes are comprised of a reaction product obtained from a mixture of a major proportion of a petroleum oil feed stock, such as a crude or a portion thereof, and a minor proportion of an additive, such as an oxygenated hydrocarbon, i.e., an oxo-alcohol or the like, reacted with SO.sub.3 under sulfonation conditions, mixed with about 0.5 to 20% (by reaction mixture weight) of water at the temperature in the range of about 50.degree. to 150.degree. C. for a relatively brief period of time and then neutralizing the resultant material with a base, such as NaOH. The neutralized petroleum sulfonated material thus obtained, which may or may not be extracted to remove unsulfonated organic material or salts, is then formulated into a slug for injection into an oil field for enhanced oil recovery.

REFERENCES:
patent: 3887611 (1975-06-01), Sweeney et al.
patent: 4147638 (1979-04-01), Plummer
patent: 4148821 (1979-04-01), Nussbaum et al.
patent: 4177207 (1979-12-01), Nussbaum et al.

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