Method for enhanced oil recovery by injecting an aqueous polymeric composition containing microgels
US11149186B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Dec 20, 2017 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Apr 15, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method for enhanced oil recovery by flushing an underground formation, comprising the injection into the underground formation of an aqueous composition comprising microgels having at least one crosslinked polymer, characterized in that the polymer is crosslinked with at least one crosslinking agent capable of being degraded under the temperature conditions of the underground formation, and a content of crosslinking agent between 1 and 90 ppm per mole with respect to the total number of moles of monomer constituting the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.