Aqueous solution and method for use thereof

Abstract

An aqueous solution is disclosed including water, an acid, a nitrogen-containing compound, and a functionalizing agent (FA), which can be a ketone, diketone, aldehyde, dialdehyde, organic acid, and combinations thereof. An additional aqueous solution is disclosed including water, an acid, and an acid neutralizing agent which can be a reaction product of at least a portion of the nitrogen-containing compound and the functionalizing agent. Methods of treating a formation are also disclosed including treating a formation fluidly coupled to a wellbore with an oilfield treatment fluid comprising either or both of the aqueous solutions.

1 - 20 . (canceled) 
     
     
         21 . An aqueous solution, comprising:
 water;   an acid;   a nitrogen-containing compound comprising urea; and   a functionalizing agent (FA) comprising glyoxal, wherein the urea and the glyoxal react to form glycoluril in the aqueous solution.   
     
     
         22 . The aqueous solution of  claim 21 , wherein the acid is selected from the group consisting of hydrochloric acid (HCl), hydrobromic acid, hydroiodic acid, hydrofluoric acid, sulfuric acid, nitric acid, phosphoric acid, alkanesulfonic acids, arylsulfonic acids, acetic acid, formic acid, alkyl carboxylic acids, acrylic acid, lactic acid, glycolic acid, malonic acid, fumaric acid, citric acid, tartaric acid, and combinations thereof. 
     
     
         23 . The aqueous solution of  claim 21 , wherein the acid is HCl, and a molar ratio of glyoxal:urea is from about 0.1 to about 2. 
     
     
         24 . The aqueous solution of  claim 21 , wherein the acid is HCl, and a molar ratio of urea:HCl is from about 0.1 to about 2.4. 
     
     
         25 . The aqueous solution of  claim 21 , wherein a formation temperature is higher than about 225° F. (107° C.). 
     
     
         26 . An aqueous solution, comprising:
 water;   an acid;   a nitrogen-containing compound of formula I:   
       
         
           
           
               
               
           
         
         
           wherein R1 and R2 can be the same or different and are each selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen; and 
         
         a functionalizing agent (FA) selected from the group consisting of formula II, formula III, formula IV, and combinations thereof: 
       
       
         
           
           
               
               
           
         
         
           wherein:
 R3 is selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen; and 
 R4 is selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, and an aryl group; 
 
         
       
       
         
           
           
               
               
           
         
         
           wherein:
 R5 and R6 can be the same or different and are each selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen; and 
 n ranges from 0 to 3; and 
 
         
       
       
         
           
           
               
               
           
         
         
           wherein R7 is selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen. 
         
       
     
     
         27 . The aqueous solution of  claim 26 , wherein the acid is selected from the group consisting of hydrochloric acid (HCl), hydrobromic acid, hydroiodic acid, hydrofluoric acid, sulfuric acid, nitric acid, phosphoric acid, alkanesulfonic acids, arylsulfonic acids, acetic acid, formic acid, alkyl carboxylic acids, acrylic acid, lactic acid, glycolic acid, malonic acid, fumaric acid, citric acid, tartaric acid, and combinations thereof. 
     
     
         28 . The aqueous solution of  claim 26 , wherein the FA is a ketone, diketone, aldehyde, dialdehyde, organic acid, or combinations thereof. 
     
     
         29 . The aqueous solution of  claim 26 , wherein the acid is HCl, the nitrogen-containing compound is urea, and a molar ratio of FA:nitrogen containing compound is from about 0.1 to about 2. 
     
     
         30 . The aqueous solution of  claim 26 , wherein a molar ratio of nitrogen-containing compound:acid is from about 0.1 to about 2.4. 
     
     
         31 . An aqueous solution comprising:
 water;   an acid; and   an acid neutralizing agent selected from the group consisting of formula V, formula VI, formula VII, and combinations thereof:   
       
         
           
           
               
               
           
         
         
           wherein:
 R1 and R2 can be the same or different and are each selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen; 
 R3 is selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen; 
 R4 is selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, and an aryl group; 
 R5 and R6 can be the same or different and are each selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen; and 
 R7 is selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen. 
 
         
       
     
     
         32 . The aqueous solution of  claim 31 , wherein the acid is selected from the group consisting of hydrochloric acid, hydrobromic acid, hydroiodic acid, hydrofluoric acid, sulfuric acid, nitric acid, phosphoric acid, alkanesulfonic acids, aryl sulfonic acids, acetic acid, formic acid, alkyl carboxylic acids, acrylic acid, lactic acid, glycolic acid, malonic acid, fumaric acid, citric acid, tartaric acid, and combinations thereof. 
     
     
         33 . The aqueous solution of  claim 31 , wherein the acid neutralizing agent is prepared from the reaction of i) at least a portion of a nitrogen-containing compound of formula I with ii) a functionalizing agent (FA) selected from the group consisting of formula II, formula III, formula IV, and combinations thereof: 
       
         
           
           
               
               
           
         
         wherein R1 and R2 can be the same or different and are each selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen; 
       
       
         
           
           
               
               
           
         
         wherein:
 R3 is selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen; and 
 R4 is selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, and an aryl group; 
 
       
       
         
           
           
               
               
           
         
         wherein:
 R5 and R6 can be the same or different and are each selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen; and 
 n ranges from 0 to 3; and 
 
       
       
         
           
           
               
               
           
         
         wherein R7 is selected from the group consisting of an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group, an aryl group, and hydrogen. 
       
     
     
         34 . The aqueous solution of  claim 31 , wherein the FA is a ketone, diketone, aldehyde, dialdehyde, organic acid, and combinations thereof. 
     
     
         35 . The aqueous solution of  claim 31 , wherein the acid is HCl, the nitrogen-containing compound is urea, and a molar ratio of acid neutralizing agent:acid is from about 0.1 to about 1.2. 
     
     
         36 . The aqueous solution of  claim 31 , wherein the aqueous solution does not include an additional acid neutralizing agent.