Method for reducing the permeability of subterranean formations to brines
US4120361A · kind A · utility
26Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1975 |
| Grant date | Oct 17, 1978 |
| Priority date | — |
| Expiry date | Sep 11, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for reducing the quantity of water produced from a well bore-penetrated subterranean formation and for increasing the production rate of fluid hydrocarbons produced from said formation. Said method comprises injecting into said formation an aqueous solution of a partially hydrolyzed polyacrylamide, and contacting said polyacrylamide in situ with an aqueous solution containing divalent and/or trivalent metal cations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.