Stability enhanced water-in-oil emulsion and method for using same
US7186673B2 · kind B2 · utility
42Cited by
111References
42Claims
0Family size
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Key dates
| Filing date | Mar 28, 2001 |
| Grant date | Mar 6, 2007 |
| Priority date | — |
| Expiry date | May 7, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/588
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for enhancing the stability of a water-in-oil emulsion pretreating at least a portion of the oil prior to emulsification. The pretreatment step may consist of adding polymers to the oil, biotreating the oil, photochemically treating the oil, or combinations thereof. The emulsion may be used in various enhanced oil recovery methods including using the emulsion as a flooding agent to displace hydrocarbons in a subterranean formation, and using the emulsion as a barrier fluid for diverting flow of fluids in the formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.