Composition for enhancing injectivity of a subterranean formation
US12091608B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2019 |
| Grant date | Sep 17, 2024 |
| Priority date | — |
| Expiry date | Aug 12, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Use of at least one compound of formula (I): (I) [P+(R1—Y—R2)4]zXz- is described for enhancing the injectivity of an injection well, wherein: Y is chosen from an oxygen atom or an NH group; R1 is a linear or branched alkyl radical having from 1 to 15 carbon atoms; R2 is chosen from a hydrogen atom or a linear or branched alkyl radical having from 1 to 14 carbon atoms; Xz- is a monovalent anion or a divalent anion, or a trivalent anion, or a tetravalent anion group; z is a number from 1 to 4. The compound of formula (I) is added to an aqueous medium to form an injection stream which is injected into a subterranean formation which comprises at least one polymer, via said injection well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.