Composition and method for treating subterranean formation

• US 9,359,544 B2
• Filed: 12/11/2013
• Issued: 06/07/2016
• Est. Priority Date: 12/11/2013
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (SLB)
• Original Assignee: Schlumberger Technology Corporation (SLB)
• Inventors: Milne, Arthur William, Miquilena, Emilio, Ali, Syed A.
• Primary Examiner(s): Hutton, Jr., Doug
• Assistant Examiner(s): RUNYAN, SILVANA C
• Application Number:
  US14/102,532
• Publication Number:
  US 20150159081A1
• Time in Patent Office: 909 Days
• Field of Search: 166/307, 166/308.1, 166/308.2, 166/305.1
• US Class Current: 1/1
• CPC Class Codes: C09K 8/602 containing surfactants
• CPC Class Codes: C09K 8/74 combined with additives added for specific purposes
• CPC Class Codes: E21B 43/283 in association with a fracturing process

Abstract

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.

Claims

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.