Internal olefin sulfonate compostion

Patent metadata

Field	Value
Publication number	US-2016017207-A1
Application number	US-201414772795-A
Country	US
Kind code	A1
Filing date	Mar 4, 2014
Priority date	Mar 6, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

The present invention provides an internal olefin sulfonate composition, comprising water and an internal olefin sulfonate mixture having an average carbon number of at least 20, wherein the internal olefin sulfonate mixture comprises hydroxy sulfonates and alkene sulfonates in a weight ratio of hydroxy sulfonates to alkene sulfonates of at least 3.25. The invention further provides a method of treating a crude oil containing formation.

First claim

1 . An internal olefin sulfonate composition, comprising water and an internal olefin sulfonate mixture having an average carbon number of at least 20, wherein the internal olefin sulfonate mixture comprises hydroxy sulfonates and alkene sulfonates in a weight ratio of hydroxy sulfonates to alkene sulfonates of at least 3.25 and the internal olefin sulfonate mixture further comprises disulfonate compounds in an amount equal to or less than 1.4 wt % on an active mater basis.

2 . An internal olefin sulfonate composition according to claim 1 , wherein the internal olefin sulfonate mixture comprises hydroxy sulfonates and alkene sulfonates in a weight ratio of hydroxy sulfonates to alkene sulfonates of at least 3.50.

3 . (canceled)

4 . An internal olefin sulfonate composition according to claim 1 , wherein the internal olefin sulfonate composition further comprises inorganic sulfide compounds in an amount equal to or less than 5 wt % on an active mater basis.

5 . An internal olefin sulfonate composition according to claim 1 , wherein the internal olefin sulfonate mixture further comprises diolefin sulfonate compounds in an amount equal to or less than 1.1 wt % on an active mater basis.

6 . An internal olefin sulfonate composition according to claim 1 , comprising a C20-24 internal olefin sulfonate.

7 . An internal olefin sulfonate composition according to claim 1 , comprising a C24-28 internal olefin sulfonate.

8 . An internal olefin sulfonate composition according to claim 1 , comprising a C19-23 internal olefin sulfonate.

9 . An internal olefin sulfonate composition according to claim 1 , having a concentration of active matter of from 30% to 95%.

10 . An internal olefin sulfonate composition according to claim 8 , having a concentration of active matter of from 30% to 35%.

11 . An internal olefin sulfonate composition according to claim 1 , having a kinematic viscosity of no more than 1000 mm2/s, as measured with ASTM D445 at 26.7° C. and 20 wt % active matter, based on the internal olefin sulfonate composition.

12 . An internal olefin sulfonate composition according to claim 1 , further comprising a viscosity reducing compound.

13 . A method of treating a crude oil containing formation comprising admixing at least the internal olefin sulfonate composition according to claim 1 with water and/or brine, preferably from the formation from which crude oil is to be extracted, to form an injectable fluid, wherein the active matter comprises in the range of from 0.05 to 1.0 wt % of the injectable fluid and then injecting the injectable fluid into the formation.

14 . A method of treating a crude oil containing formation according to claim 13 wherein the active matter comprises in the range of from 0.1 to 0.8 wt % of the injectable fluid.

Assignees

• Shell Oil Co

Inventors

• Barnes Julian Richard
• Buechele James Laurel
• Dirkzwager Hendrik
• Genuit Willem Johan Louis
• Purcell Jeremiah Michael
• Semien Catherine
• Reznik Carmen Geraldine

Classifications

• C07C309/20

  of an acyclic unsaturated carbon skeleton · CPC title

• E21B43/16

  Enhanced recovery methods for obtaining hydrocarbons · CPC title

• C08F220/56

  Acrylamide; Methacrylamide · CPC title

• C09K8/882

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C09K8/58 Primary

  Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids · CPC title