Patent ID: 9701891
Date: 2017-07-11
CPC Classifications: C09K,E21B

Claim:
1. A method of fracturing a subterranean formation penetrated by a wellbore, the method comprising: formulating an aqueous fracturing fluid; injecting the fracturing fluid down the wellbore at a rate and applied pressure sufficient for the fluid to flow into the formation and to initiate or extend fractures in the formation; reducing the applied pressure in the injected fluid so at least a portion of the injected fracturing fluid flows back from the formation and into the well bore; and removing the fracturing fluid that flowed back into the wellbore from the wellbore; wherein the aqueous fracturing fluid comprises; an aqueous base fluid, a proppant, a viscosifier, and a mixture of flowback aids (F) including at least one flowback aid (F1), which is an alkyl or alkenyl polyglucosides having the general formula R (F3), which is an alkoxylated branched alcohol having the general formula R wherein, the mixture includes the at least one (F1), and the at least one (F3), flowback aids in a weight ratio (F1):(F3) of from 1:10 to 10:1.