Method for well stimulation using nanobubbles

Abstract

A composition and methods are provided for stimulating a well with nanobubbles. An exemplary method includes obtaining a stimulation fluid and generating a nanobubbles solution, wherein the nanobubbles solution includes nano-sized bubbles in the stimulation fluid. The nanobubbles solution is injected into the oil well.

What is claimed is: 
     
         1 . A nanobubbles solution for stimulating an oil well, wherein the nanobubbles solution is prepared by:
 mixing an acid into a base fluid to form an acid solution;   adding a surfactant to the acid solution to form an acid/surfactant solution;   adding a corrosion inhibitor to the acid/surfactant solution to form a stimulation fluid;   generating nano-sized bubbles in the stimulation fluid by a nanobubble generator to form a nanobubbles solution, wherein the nanobubbles solution comprises nano-sized bubbles and has a viscosity as that of the base fluid.   
     
     
         2 . The nanobubbles solution of  claim 1 , wherein the acid comprises an inorganic acid, an organic acid, or an acid generating compound. 
     
     
         3 . The nanobubbles solution of  claim 2 , wherein the acid comprises hydrochloric acid, sulfuric acid, or nitric acid, or any combination thereof. 
     
     
         4 . The nanobubbles solution of  claim 2 , wherein the acid comprises acetic acid or formic acid. 
     
     
         5 . The nanobubbles solution of  claim 1 , wherein the nano-sized bubbles are generated by sonication. 
     
     
         6 . The nanobubbles solution of  claim 1 , wherein the nano-sized bubbles comprise CO 2 . 
     
     
         7 . The nanobubbles solution of  claim 1 , wherein a density of the nanobubbles solution comprising the nano-sized bubbles is within 0.01 g/cc of the nanobubbles solution without the nano-sized bubbles. 
     
     
         8 . The nanobubbles solution of  claim 1 , wherein the nano-sized bubbles in the nanobubbles solution have a higher miscibility with intermediate and low carbon oils when compared to the nanobubbles solution without the nano-sized bubbles. 
     
     
         9 . A composition for stimulating an oil well, the composition comprising:
 an acid selected from an inorganic acid, an organic acid, or an acid generating compound;   a surfactant selected from a cationic surfactant, an anionic surfactant, or a zwitterionic surfactant;   a corrosion inhibitor; and   nano-sized bubbles.   
     
     
         10 . The composition of  claim 9 , wherein the acid comprises hydrochloric acid, sulfuric acid, nitric acid, or any combination thereof. 
     
     
         11 . The composition of  claim 9 , wherein the acid comprises acetic acid or formic acid. 
     
     
         12 . The composition of  claim 9 , wherein the nano-sized bubbles comprise CO 2 . 
     
     
         13 . The composition of  claim 9 , wherein a density of the composition comprising the nano-sized bubbles is within 0.01 g/cc of the composition without the nano-sized bubbles. 
     
     
         14 . The composition of  claim 9 , wherein the nano-sized bubbles in the composition have a higher miscibility with intermediate and low carbon oils when compared to the composition without the nano-sized bubbles. 
     
     
         15 . A method of manufacturing a nanobubbles fluid for stimulating an oil well with nanobubbles, the method comprising:
 mixing an acid with a base fluid to form an acid mixture;   adding a surfactant and a corrosion inhibitor to the acid mixture to form a stimulation fluid; and   generating nano-sized bubbles in the stimulation fluid by a nanobubble generator to form a nanobubbles fluid, wherein the nanobubbles fluid has a viscosity as that of the base fluid.   
     
     
         16 . The method of  claim 15 , comprising:
 generating nano-sized bubbles in an aqueous liquid; and   combining the aqueous liquid with the stimulation fluid.   
     
     
         17 . The method of  claim 15 , comprising generating nano-sized bubbles in the stimulation fluid by sonication. 
     
     
         18 . The method of  claim 17 , wherein the nano-sized bubbles comprise CO 2 .