Composition and method for treating subterranean formation
A composition and method for performing a treatment of a subterranean formation. The composition includes an emulsified acid and a sulfobetaine surfactant. The emulsified acid and the sulfobetaine surfactant may be mixed to form a treatment composition, which may be injected into a subterranean formation as part of an acid fracturing or hydraulic fracturing treatment.
1. A composition for treatment of a subterranean formation, the composition comprising an emulsified acid system and a sulfobetaine surfactant comprising a cationic surfactant comprising an ammonium chloride derivative and a linear alkylbenzenesulfonate.
2. The composition according to claim 1 , wherein an emulsifier present in the emulsified acid system is present at about 0.1 to about 1.0 vol. % of the emulsified acid.
3. The composition according to claim 1 , wherein the emulsified acid includes an inhibitor aid.
4. The composition according to claim 3 , wherein the inhibitor aid is a formic acid.
5. The composition according to claim 3 , wherein the inhibitor aid is present from about 0.1 to about 1.0 vol. % of the emulsified acid.
6. The composition according to claim 1 , wherein the emulsified acid includes hydrochloric acid.
7. The composition according to claim 6 , wherein the hydrochloric acid is present from about 5 wt. % to about 32 wt. % of the emulsified acid.
8. The composition according to claim 7 , wherein the hydrochloric acid is present from about 10 wt. % to about 28 wt. % of the emulsified acid.
9. The composition according to claim 1 , further comprising diesel.
10. The composition according to claim 9 , further comprising an amount of diesel sufficient to make between a 90:10 (acid:diesel) and a 60:40 (acid:diesel) emulsion.
11. The composition according to claim 9 , further comprising an amount of diesel sufficient to make a 70:30 (acid:diesel) emulsion.
12. The composition according to claim 9 , further comprising an amount of diesel sufficient to make an 80:20 (acid:diesel) emulsion.
13. The composition according to claim 1 , further comprising ethyleneglycolmonobutylether-2-butoxyethanol.
14. A method for treating a subterranean formation, comprising:
adding a sulfobetaine surfactant to an emulsified acid, thereby forming a treatment composition, and
injecting the treatment composition to the subterranean formation; wherein the sulfobetaine surfactant comprises a cationic surfactant comprising an ammonium chloride derivative and a linear alkylbenzenesulfonate.
15. The method according to claim 14 , wherein the emulsified acid includes hydrochloric acid.
16. The method according to claim 14 , wherein the emulsified acid includes an emulsifier.
17. A method for performing an acidizing treatment in a subterranean formation, comprising:
adding a sulfobetaine surfactant to an emulsified acid, thereby forming a treatment composition, and
injecting the treatment composition to the subterranean formation to thereby induce a fracture at a portion of the subterranean formation; wherein the sulfobetaine surfactant comprises a cationic surfactant comprising an ammonium chloride derivative and a linear alkylbenzenesulfonate.
18. The method according to claim 17 , wherein the emulsified acid includes hydrochloric acid.