Methods for passing a swelling agent into a reservoir to block undesirable flow paths during oil production
US6889766B2 · kind B2 · utility
21Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2003 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Mar 27, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for recovering oil from a reservoir is provided. This method comprises passing a swelling agent into a permeable zone of the reservoir that allows fluid to flow between an injection well and a producing well. An aqueous solution is passed into the reservoir to contact the swelling agent, thereby causing the swelling agent to swell and substantially block the permeable zone. One or more injectants are passed into the reservoir to remove oil therefrom. The swelling agent inhibits the injectants from passing through the permeable zone, ensuring that the injectants pass through the areas of the reservoir containing oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.