Subterranean formation water permeability reducing methods
US6695055B2 · kind B2 · utility
2Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2001 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Jun 4, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods of reducing the water permeability of a water producing zone in a subterranean formation are provided. The methods basically comprise introducing a polymeric surfactant and an inert gas into the water producing zone to thereby form a water permeability reducing foam therein. The polymeric surfactant has the property of facilitating the formation of the foam and the additional property of stabilizing the foam in the presence of flowing formation water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.