Patent ID: 9562423
Date: 2017-02-07
CPC Classifications: C09K,E21B

Claim:
1. A method comprising: (a) providing a treatment fluid comprising an aqueous base fluid, an acid, a permeability modifier, and a permeability modifier deactivator, wherein the permeability modifier deactivator is present in an amount in the range of from 0.001% to about 200% by weight of the permeability modifier; (b) providing an injection well in a subterranean formation having a first treatment zone comprising a first aqueous formation permeability, wherein the first treatment zone comprises formation damage; (c) introducing the treatment fluid into the injection well, so as to contact the acid, the permeability modifier, and the permeability modifier deactivator with the first treatment zone; (d) reacting the acid with the first treatment zone so as to repair a portion of the formation damage; (e) reacting the permeability modifier with the first treatment zone so as to cause the first aqueous formation permeability in the first treatment zone to adopt a second aqueous formation permeability that is less than the first aqueous formation permeability; (f) contacting the permeability modifier deactivator with the permeability modifier at the first treatment zone so as to deactivate the permeability modifier and restore the first treatment zone to at least about 20% of the first aqueous formation permeability, wherein the permeability modifier deactivator blocks hydrophobic functional groups present on the permeability modifier from forming intermolecular or intramolecular associations; (g) removing the treatment fluid from the injection well; and (h) performing an operation in the injection well selected from the group consisting of a waterflood operation, a pressure maintenance operation, an enhanced oil recovery operation, and any combination thereof.