Method for improving injectivity of fluids in oil reservoirs
US5632336A · kind A · utility
290Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1994 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Jul 28, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/164
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method is provided for increasing the rate of injection of flooding fluids into injection wells. A slug of polar solvent or a mixture of polar solvent and non-aqueous flooding fluid is injected into the injection well to displace aqueous and hydrocarbon liquids in the rock surrounding the injection well. Thereafter, the solvent is removed from the vicinity of the injection well by flooding fluid. The process may be repeated following each time water is injected into the injection well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.