PETROLEUM SULFONATE PRODUCT AND RECOVERY OF UNDERGOUND OIL BY USING SAID PRODUCT

摘要

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° to 150° C. for a relatively brief period of time and then neutralizing the resultant material with an 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.