Method for terminating or reducing water flow in a subterranean formation
US7874363B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2008 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Jan 8, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of conditioning well bores and reducing the deleterious effects of water production in a subterranean formation by placing an aqueous phase polymer and/or resin, which at a designated set up time, solidifies and blocks water conduits and establishes post treatment gas and oil permeability. Novel polymers and/or resins for use as a water barrier are typified by phenolformaldehyde containing 1-2 weight % of at least one of sodium bisulphite, sodium metabisulphite or mixtures thereof. The method includes selecting a well having sizable hydrocarbon reserves with a production history of decrease of oil or gas production with concurrent increase of water production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.