Composition for enhancing the permeability of a geological formation

Abstract

A method for increasing the permeability of a geologic formation by fracturing includes the step of pumping a solution of a borohydride into a well bore. The solution may also include a basic material such as sodium hydroxide. This step may be followed by pumping a second acidic solution into the well bore.

1 . A fracturing fluid composition comprising:
 water;   a proppant selected from the group consisting of sand, aluminum oxide, ceramics and combinations thereof;   an alkali metal borohydride selected from the group consisting of sodium borohydride, lithium borohydride, and mixtures thereof; and   an alkaline material selected from the group consisting of alkali metal and ammonium hydroxides and combinations thereof.   
     
     
         2 . The composition of  claim 1 , wherein said alkali metal borohydride is present in an amount ranging from about 0.0001 percent to about 20 percent by weight. 
     
     
         3 . The composition of  claim 2 , wherein said proppant is present in an amount ranging from about 3 percent to about 50 percent by weight. 
     
     
         4 . The composition of claim  13 , wherein said alkaline material is present in an amount ranging from about 0.0001 percent to about 50 percent by weight. 
     
     
         5 . The method of  claim 4 , wherein the alkaline material is sodium hydroxide.