Assisted oil recovery with use of fermentation fluids
US4412925A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 29, 1978 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Jun 29, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/936
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous composition is provided, suitable for direct use in waterflood oil recovery processes, which comprises the clarified fermentation fluid obtained by PA1 (a) culturing a polysaccharide-producing microorganism in an aqueous culture medium to produce an aqueous culture containing dissolved polysaccharide therein; and PA1 (b) clarifying the resultant aqueous culture from (a) by at least one of centrifugation and filtration, introducing therein at least one bactericidal agent, and recovering the resultant clarified fermentation fluid; PA1 said aqueous composition being obtained without precipitation and recovery of a solid polysaccharide and dissolution thereof in an aqueous medium. The above composition can be pumped into oil formations without substantial clogging thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.