Steam-foaming surfactant mixtures which are tolerant of divalent ions
US4643256A · kind A · utility
73Cited by
3References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 18, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Mar 18, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/592
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a steam-foam-displacement of oil within a reservoir formation having a significant ion-exchange capacity for releasing multivalent cations, the rate of the steam foam propagation is increased by injecting a mixture of steam and a steam-foaming surfactant mixture comprising an independently effective steam-foaming sulfonate surfactant mixed with a lesser amount of an alkyl or alkylarylpolyalkoxyalkylene sulfonate cosurfactant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.