Method and composition for enhanced hydrocarbons recovery from a very high salinity, high temperature formation
AssigneeShell Oil Company
InventorsJulian Richard Barnes, Kirk Herbert Raney, Thomas Carl Semple, Paul Gregory Shpakoff, Johan Paul Smit, Jasper Roelf Smit
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Abstract
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° C., wherein the composition comprises a C15-18 internal olefin sulfonate; and (b) allowing the composition to interact with hydrocarbons in the hydrocarbon containing formation.
Claims7
A method of treating a very high salinity high temperature hydrocarbon containing formation, comprising:
- (a) providing a hydrocarbon recovery composition to at least a portion of a hydrocarbon containing formation, wherein the formation contains a brine which has a brine salinity of above 13 wt % and a temperature of above about 70° C., wherein the composition comprises a C15-18 internal olefin sulfonate, wherein said C15-18 internal olefin sulfonate means a mixture of internal olefin sulfonates wherein the mixture has an average carbon number of from 16 to 17 and at least 50% by weight of the internal olefin sulfonates in the mixture contain from 15 to 18 carbon atoms;
- and
- (b) allowing the composition to interact with hydrocarbons in the hydrocarbon containing formation.
Dependencies are inferred from the claim text.