Gel formation from reaction heating
US12247161B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2023 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | May 1, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for sealing a high permeability region in a reservoir is provided. The method includes injecting a gel precursor solution into a high permeability region in a reservoir, injecting a sodium nitrite solution proximate to the high permeability region, and injecting an ammonium chloride solution proximate to the high permeability region. The ammonium chloride solution and the sodium nitrite solution are mixed proximate to the high permeability region. The ammonium chloride solution and the sodium nitrite solution are allowed to react, increasing the temperature of the reservoir proximate to the high permeability region. The gel precursor solution is allowed to react to form a solid gel in the high permeability region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.