Method for acidizing subterranean formations
US4068719A · kind A · utility
14Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1975 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Dec 24, 1995 |
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, are provided. Said compositions comprise water, a water-dispersible polymer of acrylamide, 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 polymer 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.