US2013146293A1PendingUtilityA1

Methods for Unconventional Gas Reservoir Stimulation With Stress Unloading For Enhancing Fracture Network Connectivity

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Individually held — no corporate assignee on recordPriority: May 12, 2010Filed: May 6, 2011Published: Jun 13, 2013
Est. expiryMay 12, 2030(~3.8 yrs left)· nominal 20-yr term from priority
Inventors:Alexander F. ZazovskyStephen D. MasonKevin W. England
E21B 43/283E21B 43/006E21B 43/26
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Claims

Abstract

The invention discloses a method for use in a wellbore in a tight gas shale formation, comprising: providing a hydraulic fracturing fluid to initiate at least a fracture in the shale; injecting a treatment fluid in the fracture to at least partially destabilize and remove the shale; and repeating the step of fracturing the shale.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method for use in a wellbore, comprising:
 a. providing a hydraulic fracturing fluid to initiate at least a fracture in a subterranean formation, wherein the subterranean formation comprises a rock material;   b. injecting a treatment fluid in the fracture to at least partially remove the rock material; and   c. repeating the step of fracturing the subterranean formation.   
     
     
         2 . The method of  claim 1 , further comprising subsequently after step b, circulating the treatment fluid in the subterranean formation. 
     
     
         3 . The method of  claim 2 , further comprising re-circulating the treatment fluid in the subterranean formation. 
     
     
         4 . The method of  claim 2 , further comprising subsequently removing the treatment fluid from the wellbore. 
     
     
         5 . The method of  claim 4 , wherein the removing step is done through another wellbore. 
     
     
         6 . The method of  claim 4 , wherein the treatment fluid further comprises at least partially the rock material. 
     
     
         7 . The method of  claim 5 , wherein the two wellbores are substantially parallel. 
     
     
         8 . The method of  claim 7 , wherein the two wellbores are horizontal. 
     
     
         9 . The method of  claim 7 , wherein the two wellbores are vertical. 
     
     
         10 . The method of  claim 1 , wherein the rock material is shale. 
     
     
         11 . The method of  claim 10 , wherein the injecting step creates destabilization of the shale. 
     
     
         12 . The method of  claim 1 , further comprising subsequently after step b, creating a cavity in the subterranean formation. 
     
     
         13 . The method of  claim 1 , wherein the hydraulic fluid further comprises proppant. 
     
     
         14 . A method for use in a wellbore from a shale formation, comprising:
 a. providing a hydraulic fracturing fluid to initiate at least a fracture in the shale;   b. injecting a treatment fluid in the fracture to at least partially destabilize and remove the shale; and   c. repeating the step of fracturing the shale.   
     
     
         15 . The method of  claim 14 , further comprising subsequently after step b, circulating the treatment fluid in the shale. 
     
     
         16 . The method of  claim 15 , further comprising re-circulating the treatment fluid in the shale. 
     
     
         17 . The method of  claim 15 , further comprising subsequently removing the treatment fluid from the wellbore. 
     
     
         18 . The method of  claim 14 , wherein the hydraulic fracturing fluid in step a comprises proppant. 
     
     
         19 . The method of  claim 14 , wherein the hydraulic fracturing fluid in step c comprises proppant. 
     
     
         20 . A method for use in a shale formation, comprising:
 a. providing a hydraulic fracturing fluid through a first wellbore to initiate at least a fracture in the shale;   b. injecting a treatment fluid in the fracture through the first wellbore to at least partially destabilize and remove the shale;   c. circulating the treatment fluid trough the shale to a second wellbore; and   d. removing the treatment fluid through the second wellbore.   
     
     
         21 . The method of  claim 20  further comprising repeating the step of fracturing the shale. 
     
     
         22 . The method of  claim 20 , wherein the two wellbores are substantially parallel. 
     
     
         23 . The method of  claim 22 , wherein the two wellbores are horizontal. 
     
     
         24 . The method of  claim 22 , wherein the two wellbores are vertical.

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