Treatment of produced water, particularly obtained from a chemically enhanced oil recovery process using viscosity-increasing polymers
US10961836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2015 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Dec 10, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/365
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is concerned with the treatment of produced water, that may be obtained from a chemically enhanced oil recovery process using viscosity-increasing polymeric compounds. Said treatment comprises particularly the steps of obtaining a produced water, such as from an oil-water mixture recovered from an oil-bearing formation, wherein the produced water comprises the viscosity-increasing polymeric compounds; and, of directing the produced water to a specific filtration device, and subjecting the produced water to filtration, for obtaining a retentate stream and a permeate stream. Said process allows particularly obtaining a permeate comprising the viscosity-increasing polymeric compounds, said permeate being substantially free of suspended solids, free oil and emulsified oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.