Foamed treatment fluids for lost circulation control

Patent metadata

Field	Value
Publication number	US-11926788-B2
Application number	US-202117174607-A
Country	US
Kind code	B2
Filing date	Feb 12, 2021
Priority date	Jul 13, 2018
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

Compositions for foamed treatment fluids are disclosed. The foamed treatment fluid may comprise a cement, a viscosifying agent, a thixotropic additive, a foaming surfactant, a gas, and water. The foaming surfactant may comprise a polyethylene glycol alkyl ether (C5-C10), sulfate ammonium salt.

First claim

What is claimed is:

1. A foamed treatment fluid comprising:
a cement;
a viscosifying agent;
a thixotropic additive;
a foaming surfactant;
a gas; and
water;
wherein the foaming surfactant comprises a polyethylene glycol alkyl ether (C 6 -C 10 ), sulfate ammonium salt.

2. The foamed treatment fluid of claim 1 , wherein the foamed treatment fluid has a 10-second static gel strength of at least about 15 lbf/100 ft 2 at downhole temperature and atmospheric pressure, and a 10-minute static gel strength of at least about 70 lbf/100 ft 2 at downhole temperature and atmospheric.

3. The foamed treatment fluid of claim 1 , wherein the cement comprises a Portland cement and is present in an amount of about 10% to about 30% by weight of the foamed treatment fluid.

4. The foamed treatment fluid of claim 1 , wherein the viscosifying agent comprises a synthetic clay and is present in an amount of about 0.25% to about 5% by weight of the foamed treatment fluid.

5. The foamed treatment fluid of claim 4 , wherein the cement further comprises a pozzolan cement that comprises silica fume, wherein the silica fume is present in an amount of about 0.1% to about 20% by weight of the foamed treatment fluid.

6. The foamed treatment fluid of claim 1 , wherein the thixotropic additive comprises a sodium silicate and is present in an amount of about 0.1% to about 5% by weight of the foamed treatment fluid.

7. The foamed treatment fluid of claim 1 , wherein the foamed surfactant is present in an amount of about 0.25% to about 5% by weight of the foamed treatment fluid.

8. The foamed treatment fluid of claim 1 , wherein the gas comprises nitrogen and is present in an amount of about 1% to about 50% by weight of the foamed treatment fluid.

9. The foamed treatment fluid of claim 1 further comprising sodium hydroxide in an amount of about 0.1% to about 1% based on a total weight of the foamed treatment fluid.

10. A foamed treatment fluid comprising:
a cement comprising at least one cementitious material selected from the group consisting of a Portland cement, pozzolanic cement, gypsum cement, high alumina content cement, slag cement, a Sorel cement, and combinations thereof;
a viscosifying agent comprising a synthetic clay;
a thixotropic additive comprising at least one component selected from the group consisting of fumed silica, sodium silicate, potassium silicate, silicic acid, colloidal silicic acid, and combinations thereof;
a foaming surfactant comprising a polyethylene glycol alkyl ether (C 6 -C 10 ), sulfate ammonium salt;
a gas comprising nitrogen; and
water, wherein the foamed treatment fluid has a 10-second static gel strength of at least about 15 lbf/100 ft 2 , and a 10-minute static gel strength of at least about 70 lbf/100 ft 2 ; and wherein the foamed treatment fluid has a density of about 8 lb/gal to about 11 lb/gal.

11. The foamed treatment fluid of claim 10 , further comprising sodium hydroxide in an amount of about 0.1% to about 1% based on a total weight of the foamed treatment fluid.

12. The foamed treatment fluid of claim 10 , wherein the viscosifying agent is present in an amount of about 0.25% to about 5% by weight of the foamed treatment fluid.

13. The foamed treatment fluid of claim 10 , wherein the thixotropic additive is present in an amount of about 0.1% to about 5% by weight of the foamed treatment fluid.

14. The foamed treatment fluid of claim 13 ;
wherein the cement further comprises a pozzolan cement that comprises at least one silica source selected from the group consisting of fly ash, slag, silica fume, fumed silica, crystalline silica, silica flour, cement kiln dust, volcanic rock, perlite, metakaolin, diatomaceous earth, zeolite, shale, agricultural waste ash, and combinations thereof.

15. The foamed treatment fluid of claim 13 , wherein the cement comprises a Portland cement, wherein the cement further comprises a pozzolan cement that comprises silica fume, wherein the viscosifying agent comprises a synthetic clay, and wherein the thixotropic additive comprises a sodium silicate.

16. The foamed treatment fluid of claim 10 , wherein the foamed surfactant is present in an amount of about 0.25% to about 5% by weight of the foamed treatment fluid.

17. The foamed treatment fluid of claim 10 , wherein the gas is present in an amount of about 1% to about 50% by weight of the foamed treatment fluid.

18. A foamed treatment fluid comprising:
a cement comprising a Portland cement and present in an amount of about 10% to about 30% by weight of the foamed treatment fluid;
a viscosifying agent comprising a synthetic clay and present in an amount of about 0.25% to about 5% by weight of the foamed treatment fluid;
a thixotropic additive comprising a sodium silicate and present in an amount of about 0.1% to about 5% by weight of the foamed treatment fluid;
a foaming surfactant present in an amount of about 0.25% to about 5% by weight of the foamed treatment fluid;
a gas comprising nitrogen and present in an amount of about 1% to about 50% by weight of the foamed treatment fluid; and
water, wherein the foaming surfactant comprises a polyethylene glycol alkyl ether (C 6 -C 10 ), sulfate ammonium salt.

19. The foamed treatment fluid of claim 18 further comprising: a pozzolan cement comprising silica fume, wherein the silica fume is present in an amount of about 0.1% to about 20% by weight of the foamed treatment fluid; and sodium hydroxide in an amount of about 0.1% to about 1% based on a total weight of the foamed treatment fluid.

Assignees

• Halliburton Energy Services Inc

Inventors

• Han Tan Brendon Chia
• Lewis Samuel Jason
• Pisklak Thomas Jason
• Jones Paul Joseph

Classifications

• C09K8/487 Primary

  Fluid loss control additives; Additives for reducing or preventing circulation loss · CPC title

• C04B14/045

  Alkali-metal containing silicates, e.g. petalite (waterglass C04B12/04) · CPC title

• C04B14/10

  Clay {(sepiolite C04B14/042; grog C04B18/025)} · CPC title

• C04B16/0675

  from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C04B28/04

  Portland cements · CPC title