Shell Oil Comapny

Shell Internationale Research Maatschappij, B.v.

Paul Gregory Shpakoff

Kirk Herbert Raney

Charles Lee Edwards

Thomas Carl Semple

Johan Paul Smit

Julian Richard Barnes

Jasper Roelf Smit

A method of treating a very high salinity high temperature hydrocarbon containing formation is described. The method includes (a) providing a hydrocarbon recovery composition to at least a portion of a hydrocarbon containing formation having a brine salinity of above about 13 wt % and a temperature of above about 7&#xb0; C., wherein the composition comprises a Cinternal olefin sulfonate; and (b) allowing the composition to interact with hydrocarbons in the hydrocarbon containing formation.

Method and composition for enhanced hydrocarbons recovery from a very high salinity, high temperature formation

The present invention provides a method of treating a hydrocarbon containing formation comprising (a) providing a hydrocarbon recovery composition to at least a portion of the hydrocarbon containing formation, wherein the composition comprises one or more internal olefin sulfonates having 17 or more carbon atoms, (b) adding water and/or brine from the hydrocarbon formation to the composition, (c) adding a solubilizer which comprises an ethoxylated alcohol wherein the alcohol before ethoxylation had an average molecular weight of at least about 220 and (d) allowing the composition to interact with hydrocarbons in the hydrocarbon containing formation. The solubilizer may comprise less than about 0.1 wt %, preferably from about 0.02 to about 0.05 wt %, of the total composition and it may have from about 5 to about 9 moles of ethylene oxide per mole of alcohol.

Method and composition for enhanced hydrocarbons recovery

A method of treating a hydrocarbon containing formation is described. The method includes (a) providing a hydrocarbon recovery composition to at least a portion of the hydrocarbon containing formation, wherein (i) when the salinity of the brine is from about 2 wt % to about 4 wt %, the composition comprises a blend of a Cinternal olefin sulfonate and a Cinternal olefin sulfonate wherein the weight ratio of the Cinternal olefin sulfonate to the Cinternal olefin sulfonate is from about 90:10 to about 70:30 and (ii) when the salinity of the brine is greater than about 4 wt % up to about 13 wt % the composition comprises a blend of a Cinternal olefin sulfonate and a Cinternal olefin sulfonate wherein the weight ratio of the Cinternal olefin sulfonate to the Cinternal olefin sulfonate is from about 90:10 to about 70:30; and (b) allowing the composition to interact with hydrocarbons in the hydrocarbon containing formation.

A method of treating a hydrocarbon containing formation is described. The method may include providing a hydrocarbon recovery composition to the hydrocarbon containing formation. Hydrocarbons in the hydrocarbon containing formation may interact with the hydrocarbon recovery composition. The hydrocarbon recovery composition may include an aliphatic anionic surfactant and an aliphatic nonionic additive. In some embodiments, an aliphatic anionic surfactant may be branched. In other embodiments, an aliphatic nonionic additive may be branched.

A detergent composition having cold water solubility and exhibiting high calcium tolerance can be produced from biodegradable branched ether derivative compositions derived from a branched ether primary alcohol represented by the formula: wherein Rrepresents hydrogen or a hydrocarbyl radical having from 1 to 3 carbon atoms, Rrepresents a hydrocarbyl radical having from 1 to 7 carbon atoms, x is a number ranging from 0 to 16, preferably from 3 to 13, wherein the total number of carbon atoms in the alcohol ranges from 9 to 24.

Branched primary alcohol compositions and derivatives thereof

A detergent composition having cold water solubility and exhibiting high calcium tolerance can be produced from biodegradable branched ether derivative compositions derived from a branched ether primary alcohol represented by the formula:wherein Rrepresents hydrogen or a hydrocarbyl radical having from 1 to 3 carbon atoms, Rrepresents a hydrocarbyl radical having from 1 to 7 carbon atoms, x is a number ranging from 0 to 16, preferably from 3 to 13, wherein the total number of carbon atoms in the alcohol ranges from 9 to 24.

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Houston, TX, United States of America

Paul Gregory Shpakoff