Compositions and methods for selective modification of subterranean formation permeability
US6228812A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1999 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Apr 5, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compositions and methods for modifying the permeability of subterranean formations for the purpose of selectively reducing excessive production of aqueous fluids. The compositions include copolymers which may be added to an aqueous fluid to form a water control treatment fluid. The copolymers may include copolymers having a hydrophillic monomeric unit, a first anchoring monomeric unit and a filler monomeric unit, with the first anchoring monomeric unit being based on N-vinylformamide. Additional anchoring monomeric units may also optionally be present. The copolymers may be employed in well treatment fluids introduced into production wells or injection wells. The copolymers may also be utilized in conjunction with stimulation treatments and with introduction of other well treatment fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.