Methods for increasing gas production from a subterranean formation

• US 20080173451A1
• Filed: 01/19/2007
• Published: 07/24/2008
• Est. Priority Date: 01/19/2007
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Dalrymple, Eldon D., Reddy, B. Raghava, Brown, Paul S., Eoff, Larry S., Zhang, Danhua Leslie
• Granted Patent: US 8,302,691 B2
• Time in Patent Office: Days
• US Class Current: 166/308.2
• CPC Class Codes: C09K 8/68 containing organic compounds
• CPC Class Codes: C09K 8/885 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: E21B 43/006 Production of coal-bed methane E21B43/243 takes precedence

Abstract

Exemplary embodiments provide methods of treating a subterranean formation to improve gas production therefrom. Exemplary embodiments of the methods comprise introducing a cationic polyorganosiloxane into the subterranean formation, wherein the cationic polyorganosiloxane comprises at least two quaternary ammonium groups.

Claims

1. A method of treating a subterranean formation to improve gas production therefrom, the method comprising:

introducing a cationic polyorganosiloxane into the subterranean formation, wherein the cationic polyorganosiloxane comprises at least two quaternary ammonium groups.

2. The method of claim 1, comprising producing gas from the subterranean formation.

3. The method of claim 1, wherein gas has been produced from the subterranean formation prior to introducing the cationic polyorganosiloxane into the subterranean formation.

4. The method of claim 1, wherein introducing the cationic polyorganosiloxane into the subterranean formation increases a contact angle between water and one or more formation surfaces.

5. The method of claim 1, wherein the quaternary ammonium groups are present on one or more pendant groups of the polyorganosiloxane or on one or more chain ends of the polyorganosiloxane.

6. The method of claim 1, wherein in the range of from 2 to 150 quaternary ammonium groups are present per chain of the organosiloxane in the polyorganosiloxane.

7. The method of claim 1, wherein the cationic polyorganosiloxane comprises a polydimethylsiloxane comprising at least two quaternary ammonium groups.

8. The method of claim 1, wherein at least one of the quaternary ammonium groups comprises a dialkyl methyl quaternary ammonium group.

9. The method of claim 1, wherein at least one of the quaternary ammonium groups comprises two hydroxyalkyl groups and a methyl group.

10. The method of claim 1, wherein at least one of the quaternary ammonium groups comprises amide in one or more of the substituents on a quaternary nitrogen atom of the quaternary ammonium group.

11. The method of claim 1, wherein the cationic polyorganosiloxane is represented by the following structure:

12. The method of claim 1, wherein the cationic polyorganosiloxane is represented by the following structure:

13. The method of claim 1, wherein the cationic polyorganosiloxane is represented by the following structure:

14. The method of claim 1, wherein introducing the cationic polyorganosiloxane into the subterranean formation comprises introducing a treatment fluid into the formation, wherein the treatment fluid comprises a base fluid and wherein the cationic polyorganosiloxane is present in the treatment fluid in an amount in the range of from about 0.1% to about 10% by weight of the treatment fluid.

15. The method of claim 14, wherein the treatment fluid is introduced into the formation at or above a pressure sufficient to create or enhance one or more fractures in the subterranean formation.

16. The method of claim 1, comprising introducing a fracturing fluid into the subterranean formation at or above a pressure sufficient to create or enhance one or more fractures in the subterranean formation.

17. A method of treating a subterranean formation to improve gas production therefrom, the method comprising:

introducing a treatment fluid into a well bore that penetrates the subterranean formation so as to contact the subterranean formation with the treatment fluid, wherein the treatment fluid comprises a base fluid and a cationic polydimethylsiloxane, wherein the cationic polydimethylsiloxane comprises at least two quaternary ammonium groups, wherein treatment of the subterranean formation with the cationic polydimethylsiloxane improves gas production from the subterranean formation.

18. The method of claim 17, wherein the base fluid comprises at least one fluid selected from the group consisting of fresh water, salt water, oxygenated solvents, hydrocarbons solvents, and combinations thereof.

19. The method of claim 17, wherein the quaternary ammonium groups are present on one or more pendant groups of the polydimethylsiloxane or on one or more chain ends of the polydimethylsiloxane.

20. The method of claim 17, wherein at least one of the quaternary ammonium groups comprises a dialkyl methyl quaternary ammonium group.

21. The method of claim 17, wherein at least one of the quaternary ammonium groups comprises two hydroxyalkyl groups and a methyl group.

22. The method of claim 17, wherein at least one of the quaternary ammonium groups comprises amide in one or more of the substituents on a quaternary nitrogen atom of the quaternary ammonium group.

23. A method of treating a coalbed to improve gas production therefrom, the method comprising:

introducing a treatment fluid into a well bore that penetrates the coalbed so as to contact the coalbed with the treatment fluid, wherein the treatment fluid comprises methanol and a cationic polydimethylsiloxane, wherein the polydimethylsiloxane comprises at least two quaternary ammonium groups.

24. The method of claim 23, wherein the quaternary ammonium groups are present on one or more pendant groups of the polydimethylsiloxane or on one or more chain ends of the polydimethylsiloxane.

25. The method of claim 23, wherein at least one of the quaternary ammonium groups comprises a dialkyl methyl quaternary ammonium group.

26. The method of claim 23, wherein at least one of the quaternary ammonium groups comprises two hydroxyalkyl groups and a methyl group.

27. The method of claim 23, wherein at least one of the quaternary ammonium groups comprises amide in one or more of the substituents on a quaternary nitrogen atom of the quaternary ammonium group.