Weighted acid compositions comprising amino acids
A weighted acid composition comprising an acid, a brine, and an amino acid and associated methods.
1. A method comprising: providing a weighted acid composition comprising an acid, a brine, and an amino acid and placing the weighted acid composition into a subterranean formation, wherein:
the acid comprises formic acid or methane sulfonic acid;
the brine comprises at least one salt selected from the group consisting of: zinc bromide, calcium bromide, sodium bromide and potassium bromide;
the weighted acid composition has a density of above 9 pounds per gallon (lb/gal); and
the amino acid comprises glycine.
2. The method of claim 1 , wherein the weighted acid composition has a density in a range of from 9 lb/gal to 16 lb/gal.
3. The method of claim 1 , wherein the weighted acid composition has a density in a range of from 10 lb/gal to 16 lb/gal.
4. The method of claim 1 , wherein the concentration of the acid in the weighted acid composition is an amount in the range of from 0.2 mol/L to 8 mol/L.
5. The method of claim 1 , further comprising: allowing the weighted acid composition to acidize the subterranean formation.
6. The method of claim 1 , wherein the concentration of the salt in the weighted acid composition is an amount in the range of from 2 mol/L to 8 mol/L.
7. The method of claim 1 , wherein the glycine in the weighted acid composition acts as a chelating component.
8. The method of claim 1 , wherein the concentration of the amino acid in the weighted acid composition is an amount in the range of from 0.05 mol/L to 16 mol/L.
9. The method of claim 1 , wherein the weighted acid composition has a molar ratio of amino acid to acid in the range of from 0.25:1 to 2:1.
10. The method of claim 1 , further comprising allowing the weighted acid composition to generate a protonated amino acid.
11. A weighted acid composition comprising an acid, a brine, and an amino acid for use in a subterranean formation, wherein:
the acid comprises formic acid or methane sulfonic acid;
the brine comprises at least one salt selected from the group consisting of: zinc bromide, calcium bromide, sodium bromide, and potassium bromide;
the weighted acid composition has a density of above 9 pounds per gallon (lb/gal); and
the amino acid comprises glycine.
12. The acid composition of claim 11 , wherein the weighted acid composition has a density in a range of from 9 lb/gal to 16 lb/gal.
13. The acid composition of claim 11 , wherein the weighted acid composition has a density in a range of from 10 lb/gal to 16 lb/gal.
14. The acid composition of claim 11 , wherein the concentration of the acid in the weighted acid composition is an amount in the range of from 0.2 mol/L to 8 mol/L.
15. The acid composition of claim 11 , wherein the concentration of the salt in the weighted acid composition is an amount in the range of from 2 mol/L to 8 mol/L.
16. The acid composition of claim 11 , wherein the glycine in the weighted acid composition is a chelating component.
17. The acid composition of claim 11 , wherein the concentration of the amino acid in the weighted acid composition is an amount in the range of from 0.05 mol/L to 16 mol/L.
18. The acid composition of claim 11 , wherein the weighted acid composition has a molar ratio of amino acid to acid in the range of from 0.25:1 to 2:1.