Methods and compositions for the diversion of aqueous injection fluids in injection operations
US7563750B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2004 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Oct 20, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/588
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An exemplary method of the present invention for performing an injection operation includes providing a water-soluble relative permeability modifier, introducing the water-soluble relative permeability modifier into a subterranean formation; and injecting an aqueous injection fluid into the subterranean formation after introducing the water-soluble relative permeability modifier. An exemplary permeability-modifying injection fluid of the present invention contains water-soluble relative permeability modifier. The water-soluble relative permeability modifiers of the present invention include hydrophobically modified water-soluble polymers, hydrophilically modified water-soluble polymers, and water-soluble polymers without hydrophobic or hydrophilic modification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.