Oil recovery process
US4612991A · kind A · utility
8Cited by
18References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1985 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Mar 18, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/936
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A post-primary oil recovery process wherein the subterranean oil-bearing formation is treated by the sequential injection of (1) optional aqueous preflush to adjust connate water salinity, (2) aqueous saline surfactant system containing at least one acylated polypeptide salt surfactant, (3) optional thickened aqueous mobility buffer and (4) an aqueous drive, for the recovery of oil driven from the formation thereby.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.