Filtration and reuse of surfactant-containing produced water for oil recovery
US10245560B2 · kind B2 · utility
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Key dates
| Filing date | Nov 6, 2015 |
| Grant date | Apr 2, 2019 |
| Priority date | — |
| Expiry date | Nov 6, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for recovering oil from an oil bearing formation including the steps of: i) recovering an oil-water mixture from the oil-bearing formation; ii) separating at least a portion of the oil from the oil-water mixture to form a produced water; iii) adding a polymeric alkylene oxide surfactant having a Mw of less than 10000 Da to the produced water; iv) passing the produced water through a polymeric membrane to form a permeate stream and a retentate stream; and v) injecting the permeate stream into the oil bearing formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.