Water shut-off method for porous formations
US10351756B2 · kind B2 · utility
1Cited by
9References
9Claims
0Family size
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Key dates
| Filing date | Mar 12, 2018 |
| Grant date | Jul 16, 2019 |
| Priority date | — |
| Expiry date | Mar 12, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Organoclay is used as an alternative emulsifier and reinforcing agent to enhance the strength of emulsified polymeric gel aqueous solutions and form water in oil emulsions. The stability of the emulsion can be controlled by controlling salinity and the intensity of initial mixing. The new system can be used for water shut-off treatments as well as a relative permeability modifier in high water permeability zones. In addition, the system can tolerate salts much better than classical surfactants. This system will be appropriate for wellbores having high temperature (>85° C.) with harsh environmental conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.