Sweep improvement in enhanced oil recovery
US4703797A · kind A · utility
54Cited by
11References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1986 |
| Grant date | Nov 3, 1987 |
| Priority date | — |
| Expiry date | Feb 21, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/936
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for sweep improvement during enhanced oil recovery in a subterranean oil-bearing formation concerns the generation of foam by the dispersion of the displacing fluid in an aqueous solution of a mixed surfactant system. The mixed surfactant system comprises a lignosulfonate foaming agent and a surfactant foaming agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.