Composition for acidizing subterranean formations
US4146486A · kind A · utility
13Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1977 |
| Grant date | Mar 27, 1979 |
| Priority date | — |
| Expiry date | Oct 27, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/933
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Gelled acidic compositions suitable for either matrix-acidizing or fracture-acidizing of subterranean formations, and methods of using said compositions in acidizing operations, are provided. Said compositions comprise water, a water-dispersible biopolysaccharide, an acid, a water-soluble compound of a polyvalent metal wherein the metal can be reduced to a lower polyvalent valence state and cause gelation of the water containing said biopolysaccharide and said acid, and a reducing agent capable of reducing said metal and causing said gelation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.