Methods of reducing subterranean formation water permeability
US6476169B1 · kind B1 · utility
94Cited by
7References
25Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 28, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Feb 21, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/5083
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Improved methods of treating water and hydrocarbon producing subterranean formations to reduce the water permeability thereof are provided. The methods basically comprise introducing into the formation a water flow resisting chemical which attaches to adsorption sites on surfaces within the porosity of the formation and reduces the water permeability thereof without substantially reducing the hydrocarbon permeability thereof. The water flow resisting chemical is comprised of a polymer of at least one hydrophilic monomer and at least one hydrophobically modified hydrophilic monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.