Treatment of subsurface gas-bearing formations to reduce water production therefrom
US4276935A · kind A · utility
62Cited by
13References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1979 |
| Grant date | Jul 7, 1981 |
| Priority date | — |
| Expiry date | Oct 30, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/32
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Excessive water production from a producing gas well is substantially reduced by the injection of a hydrocarbon-diluted water-in-oil emulsion comprising a viscosifying polymer such as polyacrylamide, the injected emulsified polymer swelling on contact with connate water in the subsurface gas producing formation to restrict transfer of water therethrough toward the producing gas well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.