Method for removing a filter cake from a borehole

Abstract

The present disclosure relates to a method for removing a filter cake from a well in a subterranean formation without the need for mechanical isolation. The method comprises the steps of introducing a first alkaline aqueous fluid comprising an oxidizing agent into a borehole, introducing an activating agent selected from the group consisting of an aldehyde, a dialdehyde, a polyoxymethylene, and any suitable combination thereof into the borehole, the activating agent for activating the oxidizing agent, controlling a time frame during which the activating agent activates the oxidizing agent, activating the oxidizing agent with the activating agent, decomposing at least a portion of a filter cake by activating the oxidizing agent with the activating agent, and removing at least a portion of the filter cake from the borehole.

Dependencies are inferred from the claim text.