Method for Borehole Completion

Abstract

A method for improved borehole completion. In one embodiment, the method comprises removing a section of casing entirely and cutting a notch through the cement and into the surrounding rock formation, said notch optimally comprising a symmetric triangle terminating in a sharp point oriented perpendicular to the casing axis. Flow may be further optimized by extending the notch as far as practical into the rock matrix to increase the effective diameter of the wellbore and increase the length of the intersection between the fracture and the wellbore.

What is claimed is: 
     
         1 . A geomechanical pumped storage system with a vertical or near vertical wellbore, comprising:
 a free flowing fluid access to fractures, wherein the fractures are created with hydraulic fracturing techniques of a surrounding rock matrix that intersects the wellbore at any angle.   
     
     
         2 . The system of  claim 1 , wherein the access is enhanced by notching. 
     
     
         3 . The system of  claim 1 , wherein the access is enhanced by perforating. 
     
     
         4 . The system of  claim 1 , wherein a casing is disposed in the wellbore, and wherein the access is enhanced by cutting the casing. 
     
     
         5 . A geomechanical pumped storage system with a horizontal or near horizontal wellbore, comprising:
 a free flowing fluid access to fractures, wherein the fractures are created with hydraulic fracturing techniques of a surrounding rock matrix that intersects the wellbore at any angle.   
     
     
         6 . The system of  claim 5 , wherein the access is enhanced by notching. 
     
     
         7 . The system of  claim 5 , wherein the access is enhanced by perforating. 
     
     
         8 . The system of  claim 5 , wherein a casing is disposed in the wellbore, and wherein the access is enhanced by cutting the casing. 
     
     
         9 . The system of  claim 5 , wherein the access is enhanced by abrasive jet cutting. 
     
     
         10 . The system of  claim 5 , wherein a casing is disposed in the wellbore, and wherein the access is enhanced by slotting section of the casing.