Patent ID: 9745841
Date: 2017-08-29
CPC Classifications: C09K,E21B

Claim:
1. A method for promoting clean-up of a fracture fluid from a fracture in a subterranean formation penetrated by a wellbore after a fracturing treatment, the method comprising: (i) creating a fracture in a subterranean formation by pumping an electrically conductive fracture fluid into a wellbore under pressure; (ii) placing an electrically conductive proppant pack in the fracture in stages, wherein a first proppant placed during a first stage is more conductive than a second proppant placed during a later stage, wherein the first proppant is deposited at a fracture tip, and the second proppant is deposited behind the first proppant and closer to the wellbore; (iii) placing at least one electrode in electric communication with the fracture; and (iv) subjecting the fracture to an electric field whose strength is at least 0.05 V/m to induce electro-osmotic flow of the fracture fluid.