High temperature crosslinked fracturing fluids
US10144866B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2016 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Dec 1, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A fracturing fluid including a mixture of an aqueous copolymer composition including a copolymer, the copolymer having 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, and acrylic acid monomer units, or a salt thereof, and a crosslinker. The crosslinker includes a metal, and the weight ratio of the metal to the copolymer is in a range of 0.01 to 0.08. Treating a subterranean formation includes introducing the fracturing fluid into a subterranean formation, and crosslinking the fracturing fluid in the subterranean formation to yield a crosslinked fracturing fluid. The crosslinked fracturing fluid has a viscosity of at least 500 cP for at least 80 minutes when the gel is subjected to a shear rate of 40 s−1 at a temperature in a range of 300° F. to 400° F.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.