Surfactant blends for aqueous solutions useful for improving oil recovery
US6828281B1 · kind B1 · utility
11Cited by
46References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2000 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Sep 12, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/584
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an aqueous fluid useful for the recovery of a liquid hydrocarbon from subterranean reservoirs comprising an aqueous media and a surfactant blend. The aqueous fluid has an alkaline pH. The surfactant blend comprises at least one synthetic polyisobutylene surfactant and at least one secondary surfactant selected from the group consisting of sulfonate surfactants, alcohols and nonionic surfactants. The surfactant blend lowers the interfacial tension between hydrocarbon oil and the aqueous fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.