Vulcanized oil and water swellable particulate composite compositions

Patent metadata

Field	Value
Publication number	US-9822295-B2
Application number	US-201314907500-A
Country	US
Kind code	B2
Filing date	Oct 30, 2013
Priority date	Oct 30, 2013
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

Embodiments herein include a method comprising providing a self-sealing cement slurry comprising an aqueous base fluid, a cementitious material, and a vulcanized oil and water swellable particulate composite, wherein the vulcanized oil and water swellable particulate composite comprises an elastomer, a crosslinked water swellable superabsorbent polymer, and a hydrophobically modified water-soluble polymer; introducing the self-sealing cement slurry into a subterranean formation; and allowing the self-sealing cement slurry to set, wherein the vulcanized oil and water swellable particulate composite is capable of swelling in the presence of a non-aqueous fluid and an aqueous fluid to reduce the permeability of fluid flowpaths in the set self-sealing cement slurry upon loss of structural integrity.

First claim

The invention claimed is:

1. A method comprising:
providing a self-sealing cement slurry comprising an aqueous base fluid, a cementitious material, and a vulcanized oil and water swellable particulate composite,
wherein the vulcanized oil and water swellable particulate composite comprises an elastomer, a crosslinked water swellable superabsorbent polymer, and a hydrophobically modified water-soluble polymer;

introducing the self-sealing cement slurry into a subterranean formation; and,
allowing the self-sealing cement slurry to set,
wherein the vulcanized oil and water swellable particulate composite is capable of swelling in the presence of a non-aqueous fluid and an aqueous fluid to reduce the permeability of fluid flowpaths in the set self-sealing cement slurry upon loss of structural integrity.

2. The method of claim 1 , wherein the elastomer comprises a non-polar monomer, a polar monomer, and an ionizable polar monomer.

3. The method of claim 2 , wherein the non-polar monomer is selected from the group consisting of a diene; a substituted diene; an alpha-olefin; and any combination thereof.

4. The method of claim 2 , wherein the polar monomer is non-ionic.

5. The method of claim 2 , wherein the polar monomer is selected from the group consisting of an acrylonitrile; a N-alkoxyalkyl acrylamide; a vinyl acetate; a vinylformamide; a vinyl acetamide; a vinyl methyl ether; a vinyl pyrrolidone; an acrylate; a vinyl siloxane; and any combination thereof.

6. The method of claim 2 , wherein the polar monomer is capable of generating a carboxylate group.

7. The method of claim 2 , wherein the ionizable polar monomer is selected from the group consisting of a carboxylic acid; a carboxylic acid derivative; a salt of carboxylic acid; a sulfonic acid; a salt of sulfonic acid; and any combination thereof.

8. The method of claim 1 , wherein the hydrophobically modified water-soluble polymer is formed by hydrophobic modification of a hydrophilic polymer.

9. The method of claim 1 , wherein the hydrophobically modified water-soluble polymer is formed by a polymerization reaction of a hydrophilic monomer and a hydrophobically modified hydrophilic monomer.

10. The method of claim 1 , wherein the vulcanized oil and water swellable particulate composite further comprises a polyvalent metal oxide; a reinforcing material; and any combination thereof.

11. A method comprising:
providing a self-sealing cement slurry comprising an aqueous base fluid, a cementitious material, and a vulcanized oil and water swellable particulate composite,
wherein the vulcanized oil and water swellable particulate composite comprises an elastomer, a crosslinked water swellable superabsorbent polymer, and a hydrophobically modified water-soluble polymer;

introducing the self-sealing cement slurry into a subterranean formation; and,
allowing the self-sealing cement slurry to set,
wherein the vulcanized oil and water swellable particulate composite is capable of swelling in the presence of a non-aqueous fluid and an aqueous fluid to reduce the permeability of fluid flowpaths in the set self-sealing cement slurry upon loss of structural integrity,
wherein the crosslinked water swellable superabsorbent polymer is selected from the group consisting of a crosslinked polyacrylate-based polymer; a crosslinked polyacrylamide-based polymer; a crosslinked polyvinyl alcohol polymer; a crosslinked starch-polyacrylonitrile graft polymer; any copolymer thereof; any terpolymer thereof; and any combination thereof.

12. The method of claim 11 , wherein the elastomer comprises a non-polar monomer, a polar monomer, and an ionizable polar monomer.

13. The method of claim 12 , wherein the non-polar monomer is selected from the group consisting of a diene; a substituted diene; an alpha-olefin; and any combination thereof.

14. The method of claim 12 , wherein the polar monomer is non-ionic.

15. The method of claim 12 , wherein the polar monomer is selected from the group consisting of an acrylonitrile; a N-alkoxyalkyl acrylamide; a vinyl acetate; a vinylformamide; a vinyl acetamide; a vinyl methyl ether; a vinyl pyrrolidone; an acrylate; a vinyl siloxane; and any combination thereof.

16. The method of claim 12 , wherein the polar monomer is capable of generating a carboxylate group.

17. The method of claim 12 , wherein the ionizable polar monomer is selected from the group consisting of a carboxylic acid; a carboxylic acid derivative; a salt of carboxylic acid; a sulfonic acid; a salt of sulfonic acid; and any combination thereof.

18. The method of claim 11 , wherein the hydrophobically modified water-soluble polymer is formed by hydrophobic modification of a hydrophilic polymer.

19. The method of claim 11 , wherein the hydrophobically modified water-soluble polymer is formed by a polymerization reaction of a hydrophilic monomer and a hydrophobically modified hydrophilic monomer.

20. The method of claim 11 , wherein the vulcanized oil and water swellable particulate composite further comprises a polyvalent metal oxide; a reinforcing material; and any combination thereof.

Assignees

• Halliburton Energy Services Inc

Inventors

• Reddy B Raghava
• Liang Feng
• Morgan Ronnie G

Classifications

• C09K8/467 Primary

  containing additives for specific purposes · CPC title

• E21B33/14

  for cementing casings into boreholes · CPC title

• C04B28/02

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B2103/0062

  Cross-linked polymers · CPC title

• C04B2103/0053

  Water-soluble polymers · CPC title