Method for selectively plugging water zones
US4130165A · kind A · utility
5Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1978 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | May 1, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/32
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for shutting off or decreasing the production of water from an oil well. An oil well producing excess water is taken off production and a gas is injected into the well, followed by a slug of clean oil containing an emulsifier. The well is then produced as fast as possible. The previously injected gas and water in water-producing zones begin to finger back through the oil slug and forms a viscous emulsion which blocks the further flow of water into the producing well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.