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US 4,058,467 AGranted
Sulfonate water flood additives and method of using same
AssigneeContinental Oil Company
InventorRoy C. Sias
Life of this patent
Estimating the term…
Abstract
Sulfonates having an equivalent weight of about 300 to about 600 are saturated with carbon dioxide and injected into a petroliferous formation to improve a waterflood process.
Claims4
In a method for recovering hydrocarbons from a petroliferous formation which comprises injecting an aqueous fluid into the formation through an injection well and recovering displaced hydrocarbons from the formation through a recovery well;
- the improvement comprising injecting through the injection well an effective amount of aqueous mixture which contains from about 0.5 to about 25 weight percent of a carbon dioxide saturated alkali metal hydrocarbon sulfonate waterflood additive;
- the hydrocarbon sulfonate waterflood additive having an average equivalent weight of from about 300 to about 600.
Dependencies are inferred from the claim text.