Method of designing and executing a well treatment

Abstract

An apparatus and a method for treating a subterranean formation comprising designing a treatment that comprises a composition, wherein the design comprises a pressure influence on a viscosity of the composition, and performing the treatment, wherein the composition is not an energized fluid. An apparatus and a method wherein the viscosity is at least partially estimated based on experimental rheological data collected at pressures below about 500 psi and/or at a pressure that is about 1 atm to about 2,000 atm. An apparatus and a method for exposing a subterranean formation to a composition, comprising forming a composition comprising a polymer and a crosslinker, and pumping the composition into the subterranean formation, wherein the forming the composition comprises selecting the composition components in response to a pressure and temperature of the subterranean formation and experimentally derived behavior of the polymer and the crosslinker at the pressure, temperature, and pH of the subterranean formation. A method wherein the experimentally derived behavior of the polymer and the crosslinker is at least partially estimated based on experimental data at the pressure and temperature of the subterranean formation and/or wherein the pressure experienced by the composition being pumped into the subterranean formation is above 65 atm.

1 . A method for treating a subterranean formation, comprising:
 designing a treatment that comprises a composition, wherein the design comprises a pressure influence on a viscosity of the composition; and   performing the treatment, wherein the composition is not an energized fluid.   
     
     
         2 . The method of  claim 1 , wherein the viscosity is at least partially estimated based on experimental rheological data collected at pressures below about 500 psi. 
     
     
         3 . The method of  claim 1 , wherein the viscosity is at least partially estimated based on experimental rheological data collected at a pressure that is about 1 to about 2,000 atm. 
     
     
         4 . The method of  claim 1 , wherein the viscosity is at least partially estimated based on shear rate of the liquid. 
     
     
         5 . The method of  claim 1 , wherein the viscosity is at least partially estimated based on temperature, pH, polymer concentration, and/or crosslinker concentration of the liquid. 
     
     
         6 . The method of  claim 1 , wherein the composition comprises a polymer. 
     
     
         7 . The method of  claim 1 , wherein the composition comprises a crosslinker. 
     
     
         8 . The method of  claim 7 , wherein the crosslinker comprises boron. 
     
     
         9 . The method of  claim 1 , wherein the pressure influence occurs at a pressure above 65 atm. 
     
     
         10 . A method for exposing a subterranean formation to a composition, comprising:
 forming a composition comprising a polymer and a crosslinker;   pumping the composition into the subterranean formation;   wherein the forming the composition comprises selecting the composition components in response to a pressure and temperature of the subterranean formation and experimentally derived behavior of the polymer and the crosslinker at the pressure, temperature, and pH of the subterranean formation.   
     
     
         11 . The method of  claim 10 , wherein the experimentally derived behavior of the polymer and the crosslinker is at least partially estimated based on experimental data at the pressure and temperature of the subterranean formation. 
     
     
         12 . The method of  claim 11 , wherein the experimental data is collected at pressure that is about 1 to about 2000 atm. 
     
     
         13 . The method of  claim 10 , wherein the experimentally derived behavior of the polymer and the crosslinker is at least partially estimated based on shear rate of the liquid. 
     
     
         14 . The method of  claim 10 , wherein the experimentally derived behavior of the polymer and the crosslinker is at least partially estimated based on temperature, pH, polymer concentration, and/or crosslinker concentration of the liquid. 
     
     
         15 . The method of  claim 10 , wherein the crosslinker comprises boron. 
     
     
         16 . The method of  claim 10 , wherein the pressure experienced by the composition being pumped into the subterranean formation is above 65 atm. 
     
     
         17 . The method of  claim 10 , wherein the forming the composition comprises estimating the viscosity of the liquid. 
     
     
         18 . The method of  claim 17 , wherein the estimating the viscosity comprises using the experimentally derived behavior of the polymer and the crosslinker at the pressure of the subterranean formation. 
     
     
         19 . The method of  claim 17 , wherein the estimating the viscosity comprises using the pressure, temperature, of the subterranean formation and experimentally derived behavior of the polymer and the crosslinker at the pressure, temperature, of the subterranean formation. 
     
     
         20 . A method for exposing a subterranean formation to a composition, comprising:
 forming a composition comprising a polymer and a crosslinker;   pumping the composition into the subterranean formation;   wherein the composition viscosity is estimated using the following formula,   
       
         
           
             
               
                 Viscosity 
                  
                 
                   ( 
                   cP 
                   ) 
                 
               
               = 
               
                 
                   47 
                    
                   
                     , 
                   
                    
                   880 
                    
                   
                     k 
                     a 
                     ′ 
                   
                 
                 
                   γ 
                   
                     ( 
                     
                       1 
                       - 
                       
                         n 
                         ′ 
                       
                     
                     ) 
                   
                 
               
             
           
         
         wherein γ is the shear stress, and 
         wherein k a ′ and/or n′ is a function of pressure, and 
         wherein the forming the composition comprises using the estimated composition viscosity.