Reaction products of acrylamide polymers and methods for use thereof as relative permeability modifiers
US9644130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2014 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Oct 8, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Suppressing passage of an aqueous fluid in a subterranean formation in preference to passage of an oleaginous fluid can often be desirable. Methods for suppressing the passage of an aqueous fluid in a subterranean formation, particularly a carbonate formation, can comprise: providing a treatment fluid comprising a carrier fluid and a relative permeability modifier comprising a reaction product of 1) an acrylamide polymer, any copolymer thereof, any derivative thereof, any salt thereof, or any combination thereof, and 2) a plurality of amine-containing compounds or any salt thereof, each amine-containing compound containing a primary amine, a secondary amine, or any combination thereof, and the amine-containing compounds being randomly reacted with at least a portion of the amide groups of the acrylamide polymer; and introducing the treatment fluid into a subterranean formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.