COMPOSITION AND METHOD FOR ENHANCED HYDROCARBON RECOVERY

摘要

The invention relates to a hydrocarbon recovery composition, which composition contains: a) a first anionic surfact ant selected from the group consisting of a propoxylated primary alcohol carboxylate and a propoxylated primary alcohol glycerol sulfonate; and b) a second anionic surfactant selected from the group consisting of a propoxylated primary alcohol carboxylate and a propoxylated primary alcohol glycerol sulfonate, and wherein the first and second anionic surfactants are different. Further, the invention relates to an injectable liquid containing the hydrocarbon recovery composition and a method for treating a hydrocarbon containing formation.

主权项

1. A hydrocarbon recovery composition, which composition contains:
a) a first anionic surfactant selected from the group consisting of a propoxylated primary alcohol carboxylate and a propoxylated primary alcohol glycerol sulfonate, the propoxylated primary alcohol carboxylate or propoxylated primary alcohol glycerol sulfonate having a branched aliphatic group, which group has an average carbon number of in the range of from 12 to 30 and an average number of branches in the range of from 0.5 to 3.5, and having an average in the range of from 1 to 20 mole of propylene oxide groups per mole of primary alcohol; and b) a second anionic surfactant selected from the group consisting of a propoxylated primary alcohol carboxylate and a propoxylated primary alcohol glycerol sulfonate, the propoxylated primary alcohol carboxylate or propoxylated primary alcohol glycerol sulfonate having a branched aliphatic group, which group has an average carbon number of in the range of from 8 to 18 and an average number of branches in the range of from 0.5 to 3.5, and having an average in the range of from 1 to 20 mole of propylene oxide groups per mole of primary alcohol, wherein the first and the second anionic surfactants are different.