Compositions and methods for controlling the release of chemicals placed on particulates

• US 20050028976A1
• Filed: 08/05/2003
• Published: 02/10/2005
• Est. Priority Date: 08/05/2003
• Status: Abandoned Application

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Nguyen, Philip D.
• Application Number:
  US10/634,705
• Publication Number:
  US 20050028976A1
• Time in Patent Office: Days
• US Class Current: 166/276
• CPC Class Codes: C09K 8/516 characterised by their form or by the form of their components, e.g. encapsulated material
• CPC Class Codes: C09K 8/536 characterised by their form or by the form of their components, e.g. encapsulated material
• CPC Class Codes: C09K 8/706 Encapsulated breakers
• CPC Class Codes: C09K 8/80 Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
• CPC Class Codes: E21B 43/04 Gravelling of wells
• CPC Class Codes: E21B 43/267 reinforcing fractures by propping
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer

Abstract

The present invention relates to methods and compositions for creating and using particulate materials having treating agents absorbed thereon and coated with a degradable coating material. One embodiment of a method of the present invention provides a method treating to a subterranean formation comprising placing a coated, treated particulate into a subterranean formation wherein the coated, treated particulate comprises a particulate material having a treating agent placed thereon and a substantially complete layer of a degradable coating material coated placed thereon over the treating agent.

Claims

1. (Cancelled)

8. (Cancelled)

15. (Cancelled)

22. (Cancelled)

29. A method of preparing a coated, treated particulate material, comprising:

adsorbing a treating agent onto a particulate material; and

coating the particulate material with a coating material comprising a degradable material so that the coating material at least partially encapsulates the particulate material.

30. The method of claim 29 wherein the particulate material has at least one recessed or depressed area alone a surface of the particulate material.

31. The method of claim 29 wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.

32. The method of claim 29 wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.

33. The method of claim 29 wherein the degradable material comprises a substantially water insoluble ester;

an ortho ester;

a poly(orthoester);

an aliphatic polyester;

a lactide;

a poly(lactide);

a glycolide;

a poly(glycolide);

a poly(ε

-caprolactone);

a poly(hydroxybutyrate);

a substantially water insoluble anhydride;

a poly(anhydride);

an aliphatic carbonate;

a polycarbonate;

a poly(amino acid);

a polyphosphazene;

or a combination thereof.

34. The method of claim 29 wherein the degradable material comprises a solvent.

35. The method of claim 34 wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.

36. A method of treating a subterranean formation comprising:

providing a coated, treated particulate material comprising a treating agent adsorbed on a particulate material and an outer coating that comprises a degradable coating material, the outer coating at least partially encapsulating the particulate material; and

introducing the coated, treated particulate material into a subterranean formation.

2. The method of claim 36 wherein the particulate material has at least one recessed or depressed area along a surface of the particulate material.

3. The method of claim 36 wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.

4. The method of claim 36 wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.

5. The method of claim 36 wherein the degradable coating material comprises a substantially water insoluble ester;

an ortho ester;

a poly(orthoester);

an aliphatic polyester;

a lactide;

a poly(lactide);

a glycolide;

a poly(glycolide);

a poly(ε

-caprolactone);

a poly(hydroxybutyrate);

a substantially water insoluble anhydride;

a poly(anhydride);

an aliphatic carbonate;

a polycarbonate;

a poly(amino acid);

a polyphosphazene;

or a combination thereof.

6. The method of claim 36 wherein the degradable coating material comprises a solvent.

7. The method of claim 6 wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.

37. A method of forming a gravel pack in a well bore comprising:

providing a gravel composition comprising a servicing fluid and a coated, treated particulate material, the coated, treated particulate material comprising a treating agent adsorbed on a particulate material and an outer coating that comprises a degradable coating material, the outer coating at least partially encapsulating the particulate material; and

depositing the coated, treated particulate material into a well bore.

9. The method of claim 37 wherein the particulate material has at least one recessed or depressed area along a surface of the particulate material.

10. The method of claim 37 wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.

11. The method of claim 37 wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.

12. The method of claim 37 wherein the degradable coating material comprises a substantially water insoluble ester;

an ortho ester;

a poly(orthoester);

an aliphatic polyester;

a lactide, a poly(lactide);

a glycolide;

a poly(glycolide);

a poly(ε

-caprolactone);

a poly(hydroxybutyrate);

a substantially water insoluble anhydride;

a poly(anhydride);

an aliphatic carbonate;

a polycarbonate;

a poly(amino acid);

a polyphosphazene;

or a combination thereof.

13. The method of claim 37 wherein the degradable coating material comprises a solvent.

14. The method of claim 13 wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.

38. A method of creating a proppant pack in a fracture comprising:

providing a proppant composition comprising a servicing fluid and a coated, treated particulate material, wherein the coated, treated particulate material comprises a treating agent adsorbed on a particulate material and an outer coating that comprises a degradable coating material, the outer coating at least partially encapsulating the particulate material; and

depositing the coated, treated particulate material into a fracture in a subterranean formation.

16. The method of claim 38 wherein the particulate material has at least one recessed or depressed area alone a surface of the particulate material.

17. The method of claim 38 wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.

18. The method of claim 38 wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.

19. The method of claim 38 wherein the degradable coating material comprises a substantially water insoluble ester;

an ortho ester;

a poly(orthoester);

an aliphatic polyester;

a lactide;

a poly(lactide);

a glycolide;

a poly(glycolide);

a poly(ε

-caprolactone);

a poly(hydroxybutyrate);

a substantially water insoluble anhydride;

a poly(anhydride);

an aliphatic carbonate;

a polycarbonate;

a poly(amino acid);

a polyphosphazene;

or a combination thereof.

20. The method of claim 38 wherein the degradable coating material comprises a solvent.

21. The method of claim 20 wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.

39. A coated, treated particulate material comprising a treating agent adsorbed on a particulate material and an outer coating that comprises a degradable coating material, the outer coating at least partially encapsulating the particulate material.

23. The coated, treated particulate material of claim 39 wherein the particulate material has at least one recessed or depressed area along a surface of the particulate material.

24. The coated, treated particulate material of claim 39 wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.

25. The coated, treated particulate material of claim 39 wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.

26. The coated, treated particulate material of claim 39 wherein the degradable coating material comprises a substantially water insoluble ester;

an ortho ester;

a poly(orthoester);

an aliphatic polyester;

a lactide;

a poly(lactide);

a glycolide;

a poly(glycolide);

a poly(ε

-caprolactone);

a poly(hydroxybutyrate);

a substantially water insoluble anhydride;

a poly(anhydride);

an aliphatic carbonate;

a polycarbonate;

a poly(amino acid);

a polyphosphazene;

or a combination thereof.

27. The coated, treated particulate material of claim 39 wherein the degradable coating material comprises a solvent.

28. The coated, treated particulate material of claim 27 wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.