Surfactant for enhanced oil recovery
US11254854B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Feb 6, 2018 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Feb 6, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/594
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of extracting hydrocarbons from a subterranean formation includes injecting a surfactant composition into the subterranean formation and collecting hydrocarbons displaced by the injected surfactant composition. The surfactant composition can have at least one polyamine surfactant compound of formula R1R2NA(RNA)xNR3R4, where x is an integer from 0 to 3, R1, R2, R3, R4 and each R are independently a hydrogen atom or an alkyl group, each A is an alkylene group, and the total number of carbon atoms in the surfactant compound is from 10 to 21. The surfactant composition can include liquid or supercritical carbon dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.