Reversible plugging of oil bearing formations
US4665985A · kind A · utility
14Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1985 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Feb 19, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/5045
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Porous, subterranean oil bearing formations penetrated by at least one wellbore are temporarily and reversibly plugged/sealed, by injecting therein a solution of an alkali metal silicate and a gelling agent therefor, permitting said alkali metal silicate and said gelling agent to harden into a relatively impermeable gel, maintaining said gel for period of plugging/sealing time desired, and thence disintegrating said relatively impermeable gel to substantially restore the initial porosity of said formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.