Polyelectrolyte complexes as delayed gelling agents for oil and gas applications
US7644764B2 · kind B2 · utility
19Cited by
5References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2007 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Aug 31, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A gel-forming composition for reducing the permeability of a subterranean formation or zone comprising a water soluble polymer (e.g., Alcoflood® 935) and a polyelectrolyte gelling agent comprising a polycation (e.g., polyalkylene imine) and a polyanion (e.g., dextran sulfate) is provided. The gel-forming composition is used to delay gelation in the subterranean formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.