Process for removing silica in heavy oil recovery
US7905283B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2008 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Aug 7, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for recovery oil includes recovering an oil/water mixture from an oil well. Thereafter, the method includes separating oil from the oil/water mixture to produce an oil product and produced water having dissolved silica therein. The produced water is directed to an evaporator and produces steam and a concentrated brine. The method or process entails mixing a precipitant or crystallizing reagent with the produced water or the concentrated brine and causing the silica to precipitate from the produced water or the concentrated brine. Steam produced by the evaporator is condensed to form a distillate which is directed to steam generator. At the steam generator the distillate is heated to produce steam which is injected into an injection well, giving rise to the formation of the oil/water mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.