Substituted benzenesulphonic acids and their use in increasing the hydrocarbon production from subterranean formations.

摘要

The perfluorosubstituted compounds of formula: F(CF2)a-CH2-CH2-O-(CH2-@H-O)b-(CH2-@@-CH2)c-Zd-(C6H4-SO3<-> X<+>)e I or F(CF2)a-CH2-CH2-O-(CH2-@H-O)b-(CH2-@@-CH2)c-Zd-(SO3<-> X<+>)e II wherein a is a whole number or fraction thereof in the range of from about 4 to about 18; b is a whole number or fraction thereof in the range of from about 0 to about 30; c is a whole number or fraction thereof in the range of from about 1 to about 3; d is a whole number or fraction thereof in the range of from about 0 to about 3, d being less than or equal to c; e is a whole number or fraction thereof in the range of from about 1 to about 3, e being less than or equal to c; R is independently hydrogen or methyl, whereby mixtures containing both groups may result; X<+> is an exchangeable cation; and Z is a nucleophile-containing species containing at least one of oxygen and nitrogen, wherein the nitrogen is in the form of NR<1> wherein R<1> is independently hydrogen or methyl. These perfluoro compounds can be used to increase the production of hydrocarbons from subterranean carbonate-containing formations.