Method for oil recovery by flooding with micellar dispersions containing crude oil sulfonates
US3964548A · kind A · utility
8Cited by
8References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1975 |
| Grant date | Jun 22, 1976 |
| Priority date | — |
| Expiry date | Mar 27, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/584
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Improved oil recovery by flooding subterranean formations with micellar dispersions; comprised of hydrocarbon, water, cosurfactant, electrolyte, and petroleum sulfonate obtained by sulfonating whole or topped crude oil; is obtained by incorporating within the micellar dispersion about 1.5 to about 4.5 wt. % of active sulfonate groups (e.g. --SO.sub.3 NH.sub.4 or --SO.sub.3 Na) which are attached to the petroleum sulfonate. The micellar dispersions of this invention contain an amount of cosurfactant in excess of the amount required to produce a viscosity maximum with the particular micellar dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.