Abstract: 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.

Abstract: The invention relates to a hydrocarbon recovery composition, which composition contains: a) a first propoxylated primary alcohol sulfate; and b) a second propoxylated primary alcohol sulfate, and the first and second propoxylated primary alcohol sulfate are different. Further, the invention relates to an injectable liquid containing the hydrocarbon recovery composition and a method for treating a hydrocarbon containing formation.

Abstract: The invention relates to a hydrocarbon recovery composition, which composition contains: a) a first anionic surfactant which is a propoxylated primary alcohol sulfate; and b) a second anionic surfactant which alkoxylated primary alcohol sulfate selected from the group consisting of (i) an ethoxylated primary alcohol sulfate and (ii) an ethoxylated-propoxylated primary alcohol sulfate. Further, the invention relates to an injectable liquid containing the hydrocarbon recovery composition and a method for treating a hydrocarbon containing formation.

Abstract: The invention relates to a hydrocarbon recovery composition, which composition contains: a) a first anionic surfactant which is selected from the group consign of a propoxylated primary alcohol carboxylate or a propoxylated primary alcohol glycerol sulfonate; and b) a second anionic surfactant which is an alkoxylated primary alcohol carboxylate or an alkoxylated primary alcohol glycerol sulfonate selected from the group consisting of (i) an ethoxylated primary alcohol carboxylate, (ii) an ethoxylated-propoxylated primary alcohol carboxylate, (iii) an ethoxylated primary alcohol glycerol sulfonate and (iv) an ethoxylated-propoxylated primary alcohol glycerol sulfonate. Further, the invention relates to an injectable liquid containing the hydrocarbon recovery composition and a method for treating a hydrocarbon containing formation.

Abstract: The invention relates to a method of treating a hydrocarbon containing formation, comprising the following steps: a) providing a composition, which comprises a surfactant which is a compound of the formula (I) R—O—[R?—O]x—X, wherein R is a hydrocarbyl group having a weight average carbon number of from 13 to 30, R?—O is an alkylene oxide group, x is the number of alkylene oxide groups R?—O, and X is selected from the group consisting of: (i) a group comprising a sulfate moiety; (ii) a group comprising a carboxylate moiety; and (iii) a group comprising a sulfonate moiety, to at least a portion of the hydrocarbon containing formation, wherein the hydrocarbon containing formation comprises a crude oil which has a weight ratio of saturates to aromatics of from 0.6 to 5.0; and b) allowing the surfactant from the composition to interact with the hydrocarbons in the hydrocarbon containing formation.

Abstract: A system for producing oil and/or gas from an underground formation comprising a miscible solvent source (202); an emulsion manufacturer (204) to produce an emulsion comprising the miscible solvent; an emulsion storage facility (206) adapted to store at least about 5000 gallons of the emulsion; a first array of wells (432) dispersed above the formation; a second array of wells (412) dispersed above the formation; wherein the first array of wells comprises a mechanism to inject the miscible solvent and/or the emulsion into the formation while the second array of wells comprises a mechanism to produce oil and/or gas from the formation.

Abstract: The present invention provides a method for treating a formation containing crude oil hydrocarbons, comprising injecting an aqueous composition comprising an internal olefin sulfonate with a nominal carbon chain length between 24 to 44 into said formation and displacing said crude oil hydrocarbons toward one or more production wells. The invention further provides a method for treating a formation containing crude oil hydrocarbons, a method for improving the wettability of a subsurface surface in an subsurface formation containing crude oil hydrocarbons, and a method for separating crude oil hydrocarbons from crude oil hydrocarbons compositions.

Abstract: A system for producing oil and/or gas from an underground formation comprising a miscible solvent source (202); an emulsion manufacturer (204) to produce an emulsion comprising the miscible solvent; an emulsion storage facility (206) adapted to store at least about 5000 gallons of the emulsion; a first array of wells (432) dispersed above the formation; a second array of wells (412) dispersed above the formation; wherein the first array of wells comprises a mechanism to inject the miscible solvent and/or the emulsion into the formation while the second array of wells comprises a mechanism to produce oil and/or gas from the formation.