Use of gel-based compositions for reducing the production of water in oil- or gas-producing wells
US5322123A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1992 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Aug 20, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/935
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention has as its object the use of new composition of gels that can be used for the reduction of the production of water in oil- or gas-producing wells. The compositions of gels comprise a solution of at least one water-soluble complex of a polyvalent metallic cation such as zirconium lactate able to cross link a nonionic polysaccharide such as scleroglucan, at a concentration of 2 to 10,000 parts per million of parts, expressed by weight of metal dioxide. With a preferred concentration of 2 to 100 ppm, the oil permeability is not appreciably affected. The compositions make possible the formation of aqueous gels of scleroglucan that can be used for the prevention of inflows of water into the hydrocarbon-producing wells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.