Organic acid compositions for use in the oil and gas industry
An organic acid composition for use in oil industry activities, said composition comprising: methane sulphonic acid; a metal iodide or iodate; and an alcohol or derivative thereof. The uses include: injection/disposal in wells; squeezes and soaks or bullheads; acid fracturing; acid washes or matrix stimulations; fracturing spearheads (breakdowns); pipeline scale treatments; cement breakdowns or perforation cleaning; pH control; and de-scaling applications.
1. An organic acid composition for use in oil industry activities, said composition comprising:
water in an amount ranging from 30 to 80% by weight of the weight of the composition;
methanesulphonic acid in an amount ranging from 30 to 70% by weight of the weight of the composition;
a metal iodide or iodate in an amount of no more than 1% by weight of the weight of the composition; and
an alcohol or derivative thereof in an amount of no more than 2% by weight of the weight of the composition,
wherein the organic acid composition has a pH less than 1.0 and a shelf life of greater than 12 months.
2. The organic acid composition according to claim 1 , wherein the metal iodide or iodate is selected from the group consisting of: cuprous iodide; potassium iodide; sodium iodide and lithium iodide.
3. The organic acid composition according to claim 1 , wherein the metal iodide or iodate is potassium iodide.
4. The organic acid composition according to claim 1 , wherein the alcohol or derivative thereof is an alkynyl alcohol or derivative thereof.
5. The organic acid composition according to claim 4 , wherein the alkynyl alcohol or derivative thereof is propargyl alcohol or a derivative thereof.
6. The organic acid composition according to claim 4 , wherein the alkynyl alcohol or derivative thereof is present in a concentration ranging from 0.05 to 2.0% w/w.
7. The organic acid composition according to claim 4 , wherein the alkynyl alcohol or derivative thereof is present in a concentration ranging from 0.05 to 1.0% w/w.
8. The organic acid composition according to claim 4 , wherein the alkynyl alcohol or derivative thereof is present in a concentration of 0.25% w/w.
9. The organic acid composition according to claim 1 , wherein the metal iodide is present in a concentration ranging from 100 to 10000 ppm.
10. The organic acid composition according to claim 1 , wherein the metal iodide is present in a concentration ranging from 100 to 5000 ppm.
11. The organic acid composition according to claim 1 , wherein the metal iodide is present in a concentration of 1000 ppm.
12. An organic acid composition for use in oil industry activities according to claim 1 , wherein the methanesulphonic acid is present in an amount ranging from 42 to 70% by weight of the weight of the composition.
13. An organic acid composition for use in oil industry activities according to claim 1 , wherein the methanesulphonic acid is present in an amount ranging from 51 to 70% by weight of the weight of the composition.
14. An organic acid composition for use in oil industry activities, said composition comprising:
water present in an amount ranging from 30 to 80% by weight of the weight of the composition;
methanesulphonic acid present in an amount ranging from 30 to 70% by weight of the weight of the composition;
potassium iodide present in an amount of no more than 1% by weight of the weight of the composition; and propargyl alcohol present in an amount of no more than 2% by weight of the weight of the composition.
15. An organic acid composition for use in oil industry activities according to claim 14 , wherein the methanesulphonic acid is present in an amount ranging from 42 to 70% by weight of the weight of the composition.
16. An organic acid composition for use in oil industry activities according to claim 14 , wherein the methanesulphonic acid is present in an amount ranging from 51 to 70% by weight of the weight of the composition.