Method of improving the permeability of an underground petroleum-containing formation
US6972274B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2000 |
| Grant date | Dec 6, 2005 |
| Priority date | — |
| Expiry date | Sep 15, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L19/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention generally relates to a method and a composition useful in restoring the permeability of a porous underground petroleum containing formation. Restoring permeability to the formation enhances the injectivity thereby accelerating petroleum recovery. The method of the invention comprises treating said formation with a composition which comprises a combination of at least one nonionic compound, preferably an alkoxylated alcohol, with at least one cationic compound, preferably a quaternary ammonium compound, in an amount effective to improve the permeability of the formation. The composition may also optionally contain an alkyl glycoside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.