Hydrate-inhibiting well fluids

Abstract

A method of treating a well including injecting a well-treating fluid into the well, where the well-treating fluid comprises a glycol compound and an organic liquid, the glycol compound and organic liquid being present in amounts selected to achieve a desired density. In another embodiment, a well fluid including a glycol compound an organic liquid, and a salt, wherein the glycol compound, organic liquid, and salt are present in amounts selected to achieve a predetermined density is disclosed.

What is claimed is:  
     
         1 . A well fluid comprising: 
 a glycol compound; and    an organic liquid, wherein the glycol compound and the organic liquid are present in amounts selected to achieve a predetermined density suitable for annular pressure control.    
     
     
         2 . The well fluid of  claim 1 , further comprising water.  
     
     
         3 . The well fluid of  claim 1 , further comprising a salt solution.  
     
     
         4 . The well fluid of  claim 1 , wherein the well fluid is substantially water-free.  
     
     
         5 . The well fluid of  claim 1 , further comprising a polymer, wherein the polymer, the glycol compound, and the organic liquid are present in amounts selected to achieve a predetermined heat capacity.  
     
     
         6 . The well fluid of  claim 1 , further comprising a polymer, wherein the polymer, the glycol compound, and the organic liquid are present in amounts selected to achieve a predetermined thermal conductivity.  
     
     
         7 . The well fluid of  claim 1 , further comprising a polymer, wherein the polymer, the glycol compound, and the organic liquid are present in amounts selected to achieve a predetermined viscosity.  
     
     
         8 . The well fluid of  claim 3 , wherein the salt solution comprises at least one selected from the group consisting of halide brines, formate brines, and acetate brines.  
     
     
         9 . The well fluid of  claim 8 , wherein the salt solution comprises calcium bromide.  
     
     
         10 . The well fluid of  claim 1 , wherein the glycol compound comprises at least one selected from the group consisting of ethylene glycol, propylene glycol, and monoethylene glycol.  
     
     
         11 . The well fluid of  claim 1 , wherein the glycol compound comprises 20% to 50% of a total weight percentage of the well fluid.  
     
     
         12 . The well fluid of  claim 11 , wherein the glycol compound comprises monoethylene glycol.  
     
     
         13 . The well fluid of  claim 1 , wherein the organic liquid comprises 20% to 50% of the total weight percentage of the well fluid.  
     
     
         14 . The well fluid of  claim 12 , wherein the organic liquid comprises methanol.  
     
     
         15 . The well fluid of  claim 1 , wherein the predetermined density comprises 5 ppg to 9 ppg.  
     
     
         16 . A method of treating a well comprising: 
 injecting a well-treating fluid into the well, wherein the well-treating fluid comprises a glycol compound, and an organic liquid, the glycol compound and the organic liquid present in amounts selected to achieve a predetermined density suitable for annular pressure control.    
     
     
         17 . A well fluid comprising: 
 a glycol compound; and    a quaternary amine salt, wherein the glycol compound and the quaternary amine salt are present in amounts selected to achieve a predetermined density suitable for annular pressure control.    
     
     
         18 . The well fluid of  claim 17 , further comprising an organic liquid.  
     
     
         19 . The well fluid of  claim 17 , wherein the glycol compound and the quaternary amine salt are selected such that a density of the well fluid decreases when the quaternary amine is added to the glycol compound.  
     
     
         20 . The well fluid of  claim 17 , wherein the glycol compound comprises at least one selected from the group consisting of ethylene glycol, propylene glycol, and monoethylene glycol.