Patent ID: 9637675
Date: 2017-05-02
CPC Classifications: C09K

Claim:
1. A method of treating a well in communication with a subterranean formation which comprises: (A) introducing into the well a pumpable well treatment fluid comprising (i) a composite of a deformable core coated with a crosslinkable viscosifying agent and a crosslinking agent, wherein the crosslinking agent reacts with the coated crosslinkable viscosifying agent after being introduced into the well and after disassociation of the crosslinkable viscosifying agent and crosslinking agent from the deformable core; and (ii) a carrier fluid; (B) disassociating the viscosifying agent and the crosslinking agent from the deformable core, increasing the viscosity of the well treatment fluid in-situ by disassociating the viscosifying agent and crosslinking agent from the deformable core and forming agglomerates of the deformable core after disassociation of the crosslinking agent and viscosifying agent; and (C) forming a barrier within the formation or within the wellbore from the agglomerates of deformable core wherein the barrier causes at least one of the following conditions to result: (a) reduction in the permeability of the formation; (b) mitigation of fluid loss into the formation; or (c) reduction of fluid communication within the well and further wherein at least one of the following conditions prevail: (i) the amount of crosslinking agent coated onto the deformable core is between from 0.001 to 2 percent based on the total weight of the deformable core, viscosifying agent and crosslinking agent; or (ii) the amount of viscosifying agent coated onto the deformable core is between from about 0.1 to about 5 wt %, based on the total weight of deformable core and viscosifying agent.