Enhanced oil recovery method using surfactant compositions for improved oil mobility
This patent describes a surfactant composition useful for coacting with an emulsion in a petroleum reservoir which includes at least two surfactant components, one of the components being an anionic surfactant and the other of the components being a nonionic polyether surfactant which is selected from among polyol ethers, polyol esters and phenolic resins, wherein the anionic surfactant comprises an alpha olefin sulfonate dimmer having from 15 to 45 carbon atoms, wherein the ratio of the components is selected to reduce the viscosity of an emulsion in a petroleum reservoir to near, or less than, the viscosity of the oil phase alone and wherein the anionic surfactant component is from 30 to 70 weight percent of the total surfactant composition.
- Assignee:
- Chevron Corp., San Francisco, CA (United States)
- Patent Number(s):
- US 5110487; A
- Application Number:
- PPN: US 7-622197
- OSTI ID:
- 5187756
- Resource Relation:
- Patent File Date: 5 Dec 1990
- Country of Publication:
- United States
- Language:
- English
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