Treatment fluids comprising diutan and associated methods

• US 20080194430A1
• Filed: 02/08/2007
• Published: 08/14/2008
• Est. Priority Date: 02/08/2007
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Pauls, Richard W., Welton, Thomas D., Song, Lulu, Beach, Sean R., Robb, Ian D., Bryant, Jason E.
• Granted Patent: US 7,910,524 B2
• Time in Patent Office: Days
• US Class Current: 507/213
• CPC Class Codes: C09K 8/68 containing organic compounds
• CPC Class Codes: C09K 8/72 Eroding chemicals, e.g. acids
• CPC Class Codes: F17D 1/17 by mixing with another liquid , i.e. diluting

Abstract

Treatment fluids are provided that include a treatment fluid comprising a base fluid and a gelling agent that comprises clarified diutan. In some embodiments, the treatment fluid is a subterranean treatment fluid. In some embodiments, the treatment fluid is a subterranean treatment fluid comprising a base fluid, a gelling agent that comprises clarified diutan, and at least a plurality of particulates. Additional treatment fluids are also provided.

Claims

1. A treatment fluid comprising a base fluid and a gelling agent that comprises clarified diutan.

2. The composition of claim 1 wherein the clarified diutan has a transmittance at 600 nm wavelength of at least about 65% in a 1 centimeter optical cell, at 0.1% concentration in deionized water.

3. The composition of claim 1 wherein the clarified diutan has a transmittance at 350 nm wavelength of at least about 20% in a 1 centimeter optical cell, at 0.1% concentration in deionized water.

4. The composition of claim 1 wherein the clarified diutan in an amount of 42 lbs/Nigal in a sodium bromide brine having a density of 11.5 pounds per gallon (ppg) has a fluid loss greater than about 30 grams in 5 minutes at ambient temperature in a filtering laboratory test on a Baroid Filter Press using 40 psi of differential pressure and a 11 cm Whatman #50 filter paper having a 2.7μ

pore size.

5. The composition of claim 1 wherein the clarified diutan in an amount of 42 lbs/Mgal in a sodium bromide brine having a density of 11.5 pounds per gallon (ppg) has a fluid loss greater than about 145 grams in 5 minutes at ambient temperature in a filtering laboratory test on a Baroid Filter Press using 40 psi of differential pressure and a 11 cm Whatman #2 filter paper having a 8μ

pore size.

6. The composition of claim 1 wherein the clarified diutan in an amount of 42 lbs/Mgal in a sodium bromide brine having a density of 11.5 pounds per gallon (ppg) has a fluid loss greater than about 115 grams in 2.5 minutes at ambient temperature in a filtering laboratory test on a Baroid Filter Press using 40 psi of differential pressure and a 11 cm Whatman #2 filter paper having a 8μ

pore size.

7. The composition of claim 1 wherein the gelling agent is present in the treatment fluid in an amount in the range of from about 0.25 lbs/Mgal to about 200 lbs/Mgal.

8. The composition of claim 1 wherein the base fluid is selected from the group consisting of:

an aqueous fluid;

a nonaqueous fluid selected from the group consisting of glycerol, glycol, ethylene glycol, polyglycols, propylene glycol, dipropylene gylcol methyl ether, and combinations thereof, and combinations thereof.

9. The composition of claim 1 wherein the treatment fluid further comprises an additive selected from the group consisting of:

a brine, a salt, a pH control additive, a surfactant, a breaker, a bactericide, a crosslinker, a fluid loss control additive, a stabilizer, a chelant, a scale inhibitor, a corrosion inhibitor, a hydrate inhibitor, a clay stabilizer, a salt substitute, a relative permeability modifier, a sulfide scavengers, fibers, nanoparticles, and combinations thereof.

10. The composition of claim 1 wherein the treatment fluid is selected from the group consisting of:

a fracturing fluid, a gravel packing fluid, an acidic fluid, a friction reducing fluid, a spacer fluid, an insulation fluid, a diverting fluid, a fluid loss pill, a scale removal fluid, and a chemical pig.

11. A subterranean treatment fluid comprising a base fluid, a gelling agent that comprises clarified diutan, and an acid composition.

12. The composition of claim 11 wherein the clarified diutan has a transmittance at 600 nm wavelength of at least about 65% in a 1 centimeter optical cell, at 0.1% concentration in deionized water.

13. The composition of claim 11 wherein the clarified diutan has a transmittance at 350 nm wavelength of at least about 20% in a 1 centimeter optical cell, at 0.1% concentration in deionized water.

14. The composition of claim 11 wherein the clarified diutan in an amount of 42 lbs/Mgal in a sodium bromide brine having a density of 11.5 pounds per gallon (ppg) has a fluid loss greater than about 30 grams in 5 minutes at ambient temperature in a filtering laboratory test on a Baroid Filter Press using 40 psi of differential pressure and a 11 cm Whatman #50 filter paper having a 2.7μ

pore size.

15. The composition of claim 11 wherein the clarified diutan in an amount of 42 lbs/Mgal in a sodium bromide brine having a density of 11.5 pounds per gallon (ppg) has a fluid loss greater than about 145 grams in 5 minutes at ambient temperature in a filtering laboratory test on a Baroid Filter Press using 40 psi of differential pressure and a 11 cm Whatman #2 filter paper having a 8μ

pore size.

16. The composition of claim 11 wherein the clarified diutan in an amount of 42 lbs/Mgal in a sodium bromide brine having a density of 11.5 pounds per gallon (ppg) has a fluid loss greater than about 115 grams in 2.5 minutes at ambient temperature in a filtering laboratory test on a Baroid Filter Press using 40 psi of differential pressure and a 11 cm Whatman #2 filter paper having a 8μ

pore size.

17. The composition of claim 11 wherein the gelling agent is present in the treatment fluid in an amount in the range of from about 0.25 lbs/Mgal to about 200 lbs/Mgal.

18. The composition of claim 11 wherein the base fluid is selected from the group consisting of:

an aqueous fluid;

a nonaqueous fluid selected from the group consisting of glycerol, glycol, ethylene glycol, polyglycols, propylene glycol, dipropylene gylcol methyl ether, and combinations thereof; and

combinations thereof.

19. The composition of claim 11 wherein the acid composition is selected from the group consisting of:

an acid, an acid generating compound, and combinations thereof.

20. The method of claim 11 wherein the acid composition is an acid selected from the group consisting of:

formic acid, acetic acid, citric acid, glycolic acid, lactic acid, ethylenediaminetetraacetic acid, hydroxyethyl ethylenediamine triacetic acid, hydrochloric acid, hydrofluoric acid, p-toluenesulfonic acid, and combinations thereof.

21. The composition of claim 11 wherein the acid composition is an acid generating compound selected from the group consisting of:

esters, aliphatic polyesters, ortho esters, poly(ortho esters), poly(lactides), poly(glycolides), poly(ε

-caprolactones), poly(hydroxybutyrates), poly(anhydrides), ethylene glycol monoformate, ethylene glycol diformate, diethylene glycol diformate, glyceryl monoformate, glyceryl diformate, glyceryl triformate, triethylene glycol diformate and formate esters of pentaerythritol, copolymers thereof, derivatives thereof, and combinations thereof.

22. The composition of claim 11 wherein the treatment fluid further comprises an additive chosen from the group consisting of:

a brine, a salt, a pH control additive, a surfactant, a breaker, a bactericide, a crosslinker, a fluid loss control additive, a stabilizer, a chelant, a scale inhibitor, a corrosion inhibitor, a hydrate inhibitor, a clay stabilizer, a salt substitute, a relative permeability modifier, a sulfide scavengers, fibers, nanoparticles, and combinations thereof.

23. A subterranean treatment fluid comprising a base fluid, a gelling agent that comprises clarified diutan, and at least a plurality of particulates.

24. The composition of claim 23 wherein the clarified diutan has a transmittance at 600 nm wavelength of at least about 65% in a 1 centimeter optical cell, at 0.1% concentration in deionized water.

25. The composition of claim 23 wherein the clarified diutan has a transmittance at 350 nm wavelength of at least about 20% in a 1 centimeter optical cell, at 0.1% concentration in deionized water.

26. The composition of claim 23 wherein the clarified diutan in an amount of 42 lbs/Mgal in a sodium bromide brine having a density of 11.5 pounds per gallon (ppg) has a fluid loss greater than about 30 grams in 5 minutes at ambient temperature in a filtering laboratory test on a Baroid Filter Press using 40 psi of differential pressure and a 11 cm Whatman #50 filter paper having a 2.7μ

pore size.

27. The composition of claim 23 wherein the clarified diutan in an amount of 42 lbs/Mgal in a sodium bromide brine having a density of 11.5 pounds per gallon (ppg) has a fluid loss greater than about 145 grams in 5 minutes at ambient temperature in a filtering laboratory test on a Baroid Filter Press using 40 psi of differential pressure and a 11 cm Whatman #2 filter paper having a 8μ

pore size.

28. The composition of claim 23 wherein the clarified diutan in an amount of 42 lbs/Mgal in a sodium bromide brine having a density of 11.5 pounds per gallon (ppg) has a fluid loss greater than about 115 grams in 2.5 minutes at ambient temperature in a filtering laboratory test on a Baroid Filter Press using 40 psi of differential pressure and a 11 cm Whatman #2 filter paper having a 8μ

pore size.

29. The composition of claim 23 wherein the gelling agent is present in the treatment fluid in an amount in the range of from about 0.25 lbs/Mgal to about 200 lbs/Mgal.

30. The composition of claim 23 wherein the base fluid is selected from the group consisting of:

an aqueous fluid;

a nonaqueous fluid selected from the group consisting of glycerol, glycol, ethylene glycol, polyglycols, propylene glycol, dipropylene gylcol methyl ether, and combinations thereof; and

combinations thereof.

31. The composition of claim 23 wherein the treatment fluid further comprises an additive chosen from the group consisting of:

a brine, a salt, a pH control additive, a surfactant, a breaker, a bactericide, a crosslinker, a fluid loss control additive, a stabilizer, a chelant, a scale inhibitor, a corrosion inhibitor, a hydrate inhibitor, a clay stabilizer, a salt substitute, a relative permeability modifier, a sulfide scavengers, fibers, nanoparticles, and combinations thereof.

32. The composition of claim 23 wherein the particulates are at least partially coated with a resin or a tackifying agent.