Cement composition for lost circulation application and method of cementing

Patent metadata

Field	Value
Publication number	US-10479923-B2
Application number	US-201314907597-A
Country	US
Kind code	B2
Filing date	Nov 25, 2013
Priority date	Nov 25, 2013
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A method of cementing a subterranean formation includes providing a cement composition comprising cementitious material, aqueous base fluid, nanoparticles, synthetic clay, and a thixotropic modifier, where the solid materials are about 0 wt % to about 40 wt % of the total weight of the cement composition; introducing the cement composition into a subterranean formation; and allowing the cement composition to set in the subterranean formation. Cement compositions include cementitious material, aqueous base fluid, nanoparticles, synthetic clay, and a thixotropic modifier.

First claim

What is claimed is:

1. A method of cementing a subterranean formation comprising:
preparing a cement composition comprising:
an aqueous base fluid; and
solid materials comprising:
a microfine cement;
nanoparticles comprising nano-silica;
a synthetic clay; and

a thixotropic modifier, wherein the thixotropic modifier is selected from sodium silicate, silicic acid, and combinations thereof, wherein the thixotropic modifier is present in an amount of about 0.1% to about 5% by weight of a cementitious material;

introducing the cement composition into a subterranean formation; and
allowing the cement composition to set into the subterranean formation.

2. The method of claim 1 , wherein the solid materials are about 10 wt % to about 20 wt % of the total weight of the cement composition.

3. The method of claim 1 , wherein the nanoparticles further comprise at least one of nanocarbonate, nanoalumina, and any combination thereof.

4. The method of claim 1 , wherein the nanoparticles are present in the amount of about 0.1 to about 5 gal/sack.

5. The method of claim 1 , wherein the nanoparticles have a diameter of about 2 to about 100 microns.

6. The method of claim 1 , wherein the synthetic clay is present in an amount of about 0.1% to about 3.0% by weight of water.

7. The method of claim 1 , wherein substantially no natural clay is added to the cement composition.

8. The method of claim 1 , wherein the aqueous base fluid comprises at least one of fresh water; brackish water; saltwater; and combinations thereof.

9. The method of claim 1 , wherein the aqueous bas fluid is present in the cement composition in an amount of from about 20% to about 80% by weight of cement.

10. The method of claim 1 , wherein the cement composition further comprises at least one cementitious material selected from the group consisting of Portland cements; gypsum cements; high alumina content cements; slag cements; high magnesia content cements; shale cements; acid/base cements; fly ash cements; zeolite cement systems; kiln dust cement systems; metakaolin; pumice; and combinations thereof.

11. The method of claim 1 , further comprising at least one of resins; latex; stabilizers; silica; pozzolans; microspheres; aqueous superabsorbers; viscosifying agents; suspending agents; dispersing agents; salts; accelerants; surfactants; retardants; defoamers; settling-prevention agents; weighting materials; fluid loss control agents; elastomers; vitrified shale; gas migration control additives; formation conditioning agents; and combinations thereof.

12. The method of claim 1 , wherein a density of the cement composition before curing is less than about 12 pounds per gallon.

13. The method of claim 1 , wherein the thixotropic modifier is present in the amount of about 0.1% to about 150% bwc.

14. The method of claim 1 , wherein the nanoparticles are particulate and added in the preparing step as a dry nano-silica powder, and wherein solid materials are about 0 wt % to about 40 wt % of a total weight of the cement composition.

15. A well cement composition comprising:
an aqueous base fluid;
solid materials comprising:
a microtine cement;
nanoparticles comprising nano-silica;
a synthetic clay; and
a thixotropic modifier, wherein the thixotropic modifier is selected from sodium silicate, silicic acid, and combinations thereof, wherein the thixotropic modifier is present in an amount of about 0.1% to about 5% by weight of a cementitious material.

16. The cement composition of claim 15 , wherein the solid materials are about 10 wt % to about 20 wt % of the total weight of the cement composition.

17. The cement composition of claim 15 , wherein the nanoparticles further comprise at least one of nanocarbonate, nanoalumina, and any combination thereof.

18. The cement composition of claim 15 , wherein the nanoparticles are present in the amount of about 0.1 to about 5 gal/sack.

19. The cement composition of claim 15 , wherein the nanoparticles have a diameter of about 2 to about 100 microns.

20. The cement composition of claim 15 , wherein the synthetic clay is present in an amount of 0.1% to about 3.0% by weight of water.

21. The cement composition of claim 15 , wherein substantially no natural clay is added to the cement composition.

22. The cement composition of claim 15 , wherein the aqueous base fluid comprises at least one of fresh water; brackish water; saltwater; and combinations thereof.

23. The cement composition of claim 15 , wherein the aqueous base fluid is present in the cement composition in an amount of from about 20% to about 80% by weight of cement.

24. The cement composition of claim 15 , wherein the cement composition further comprises at least one cementitious material selected from the group consisting of Portland cements; gypsum cements; high alumina content cements; slag cements; high magnesia content cements; shale cements; acid/base cements; fly ash cements; zeolite cement systems; kiln dust cement systems; metakaolin; pumice; and combinations thereof.

25. The cement composition of claim 15 , further comprising at least one of resins; latex;
stabilizers; silica; pozzolans; microspheres; aqueous superabsorbers; viscosifying agents;
suspending agents; dispersing agents; salts; accelerants; surfactants; retardants; defoamers;
settling-prevention agents; weighting materials; fluid loss control agents; elastomers; vitrified shale; gas migration control additives; formation conditioning agents; and combinations thereof.

26. The cement composition of claim 15 , wherein a density of the cement composition before curing is less than about 12 pounds per gallon.

27. The cement composition of claim 15 , wherein the thixotropic modifier is present in the amount of about 0.1% to about 150% bwc.

28. The cement composition of claim 15 , wherein the nanoparticles are particulate and added in the preparing step as a dry nano-silica powder, and wherein solid materials are about 0 wt % to about 40 wt % of a total weight of the cement composition.

29. A wellbore cementing system comprising:
a mixing apparatus;
an aqueous base fluid; and
solid materials comprising
a microtine cement;
nanoparticles comprising nano-silica;
a synthetic clay; and
a thixotropic modifier, wherein the thixotropic modifier is selected from sodium silicate, silicic acid, and combinations thereof, wherein the thixotropic modifier is present in an amount of about 0.1% to about 5% by weight of a cementitious material;
a conduit connected to a wellbore;
a pump connected to the mixing apparatus and the conduit.

Assignees

• Halliburton Energy Services Inc

Inventors

• Patil Sandip Prabhakar
• Patil Rahul Chandrakant
• Ravi Krishna M
• Singh Sheetal
• Joseph Trissa
• Duffy Marcus

Classifications

• C09K8/467 Primary

  containing additives for specific purposes · CPC title

• C09K8/42 Primary

  Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells (compositions for plastering C09K8/50) · CPC title

• C04B2111/00008

  Obtaining or using nanotechnology related materials · CPC title

• C04B28/02 Primary

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B28/04

  Portland cements · CPC title