Gels for profile control in enhanced oil recovery under harsh conditions
US4785028A · kind A · utility
37Cited by
17References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 22, 1986 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Dec 22, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/935
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition of matter where a polymer is partially hydrolyzed to form a polymer intermediate which can be gelled. Said polymer intermediate consists of 2-acrylamido-2-methylpropane-3 sulfonate, N-vinyl-N-methyl acetamide, acrylamide, and an alkali metal hydroxide. When cross-linked with a transitional metal ion said polymer intermediate forms a gel suitable for profile control use under harsh conditions. Said gel is exceptionally stable under the hot temperature and saline conditions encountered in profile control usage during a water flood or carbon dioxide oil recovery operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.