Method for remediation of subterranean-formed metal-polymer complexes using peracetic acid
US11299972B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Oct 9, 2020 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Oct 9, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/32
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This disclosure describes methods for remediating subterranean-formed metal-polymer complexes in wells in subterranean formations. In particular, these methods utilize a peracetic acid remediation mixture. The peracetic acid remediation mixture is injected into a subterranean formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the peracetic acid remediation mixture is pumped from the subsurface. This has been shown to degrade, and thus remediate, polymer-containing, subterranean-formed metal-polymer complexes in shale formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.