Method for enhanced recovery of oil from oil reservoirs
US7913759B2 · kind B2 · utility
0Cited by
7References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2008 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Jan 21, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/588
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a method for recovering oil from a subterranean reservoir using waterflooding, wherein the flooding fluid used in the waterflooding process comprises water and one or more ionic polyvinyl alcohol copolymers. The use of one or more ionic polyvinyl alcohol copolymers is expected to increase the recovery of oil by improving both the oil/water mobility ratio and the sweep efficiency in reservoirs with a high degree of heterogeneity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.