Colloidal silica-based fluid diversion
US4732213A · kind A · utility
88Cited by
5References
23Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 15, 1986 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Sep 15, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for selectively plugging permeable zones in subterranean formations or for plugging subterranean leaks which comprises injecting into the permeable zone or the site of the subterranean leak an aqueous solution containing 1 to 70 weight percent of a non-aggregated colloidal silica sol having a particle size in the range between 4 and 100 nm and a pH in the range between about 1 and 10, and causing said solution to gel in said zone or at said site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.