Method for reducing the permeability of subterranean formations
US4387769A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1981 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | Aug 10, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/935
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates generally to the composition and method for reducing the permeability of subterranean formations penetrated by a wellbore. The composition of the present invention comprises a wellbore fluid having dispersed therein a fluid loss control agent comprising a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to form small molecules which are soluble in a fluid in the subterranean formation. The method of the present invention comprises reducing the permeability of subterranean formations penetrated by a wellbore by placing the composition of the present invention down the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.