Hydrophobically and cationically modified relative permeability modifiers and associated methods
US8420576B2 · kind B2 · utility
19Cited by
193References
6Claims
0Family size
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Key dates
| Filing date | Aug 10, 2009 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Mar 7, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/508
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods comprising introducing a hydrophobically and cationically modified relative permeability modifier into a portion of a subterranean formation. The hydrophobically and cationically modified relative permeability modifier comprises a hydrophilic polymer backbone with a hydrophobic modification and a cationic modification. The cationic modification may comprise at least one cationic compound comprising an alkyl chain length of from 1 to 3 carbons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.