Methods and Compositions for Treating a Subterranean Formation with Salt-Tolerant Cement Slurries

• US 20140326455A1
• Filed: 09/20/2013
• Published: 11/06/2014
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Patil, Rahul Chandrakant, Patil, Sandip Prabhakar, Bose, Sohini, Deshpande, Abhimanyu, Ravi, Krishna M.
• Granted Patent: US 9,796,905 B2
• Time in Patent Office: Days
• US Class Current: 166/293
• CPC Class Codes: C04B 18/067 Slags
• CPC Class Codes: C04B 18/146 Silica fume
• CPC Class Codes: C04B 2103/0049 Water-swellable polymers
• CPC Class Codes: C04B 2103/0088 Compounds chosen for their latent hydraulic characteristics, e.g. pozzuolanes
• CPC Class Codes: C04B 2103/40 Surface-active agents, dispersants
• CPC Class Codes: C04B 2103/46 Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
• CPC Class Codes: C04B 2103/50 Defoamers, air detrainers
• CPC Class Codes: C04B 22/124 Chlorides of ammonium or of the alkali or alkaline earth metals, e.g. calcium chloride
• CPC Class Codes: C04B 24/2652 Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
• CPC Class Codes: C04B 24/2682 Halogen containing polymers, e.g. PVC
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 7/02 Portland cement
• CPC Class Codes: C09K 8/467 containing additives for specific purposes
• CPC Class Codes: C09K 8/487 Fluid loss control additives; Additives for reducing or preventing circulation loss
• CPC Class Codes: E21B 33/14 for cementing casings into boreholes
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Abstract

Methods and compositions for treating a subterranean formation with salt-tolerant cement slurries including treating a salt-containing subterranean formation having sodium salts, potassium salts, magnesium salts, calcium salts, or any combination thereof comprising: providing a salt-tolerant cement slurry comprising: a base fluid, a cementitious material, a pozzolanic material, a salt-tolerant fluid loss additive, a salt additive, and optionally, an elastomer, a weight additive, a fluid loss intensifier, a strengthening agent, a dispersant, or any combination thereof; introducing the salt-tolerant cement slurry into the subterranean formation; and allowing the salt-tolerant cement slurry to set.

Claims

1. A method of treating a salt-containing subterranean formation having sodium salts, potassium salts, magnesium salts, calcium salts, or any combination thereof comprising:

providing a salt-tolerant cement slurry comprising;

a base fluid,

a cementitious material,

a pozzolanic material,

a salt-tolerant fluid loss additive,

a salt additive, and

optionally, an elastomer, a weight additive, a fluid loss intensifier, a strengthening agent, a dispersant, or any combination thereof;

introducing the salt-tolerant cement slurry into the subterranean formation; and

allowing the salt-tolerant cement slurry to set.

2. The method of claim 1, wherein the cementitious material is a hydraulic cement.

3. The method of claim 1, wherein the pozzolanic material is selected from the group consisting of silica fume;

metakaolin;

fly ash;

diatomaceous earth;

calcined diatomite;

uncalcined diatomite;

calcined fullers earth;

pozzolanic clay;

calcined volcanic ash;

uncalcined volcanic ash;

bagasse ash;

pumice;

pumicite;

rice hull ash;

natural zeolite;

synthetic zeolite;

slag;

vitreous calcium aluminosilicate; and

any combination thereof.

4. The method of claim 1, wherein the salt-tolerant fluid loss additive is an amphoteric copolymer.

5. The method of claim 1, wherein salt tolerant cement slurry has a yield point in the range of about 5 to about 200 lb/100 ft² and a plastic viscosity in the range of about 120 to about 500 cP.

6. A salt-tolerant cement slurry comprising:

a cementitious material;

a pozzolanic material;

a salt-tolerant fluid loss additive;

a salt additive; and

optionally, an elastomer, a weight additive, a fluid loss intensifier, a strengthening agent, a dispersant, or any combination thereof.

7. The salt-tolerant cement slurry of claim 6, wherein the cementitious material is a hydraulic cement.

8. The salt-tolerant cement slurry of claim 6, wherein the pozzolanic material is selected from the group consisting of silica fume;

metakaolin;

fly ash;

diatomaceous earth;

calcined diatomite;

uncalcined diatomite;

calcined fullers earth;

pozzolanic clay;

calcined volcanic ash;

uncalcined volcanic ash;

bagasse ash;

pumice;

pumicite;

rice hull ash;

natural zeolite;

synthetic zeolite;

slag;

vitreous calcium aluminosilicate; and

any combination thereof.

9. The salt-tolerant cement slurry of claim 6, wherein the salt-tolerant fluid loss additive is an amphoteric copolymer.

10. The salt-tolerant cement slurry of claim 6, wherein salt tolerant cement slurry has a yield point in the range of about 5 to about 200 lb/100 ft² and a plastic viscosity in the range of about 120 to about 500 cP.

11. A salt-tolerant cement slurry comprising:

dry components, wherein the dry components comprise;

a cementitious material, wherein the cementitious material is present in a range of about 5% to about 60% w/w of the dry components,

a pozzolanic material, wherein the pozzolanic material is present in a range of about 0.001% to about 60% w/w of the dry components,

an elastomer, wherein the elastomer is present in a range of about 0.001% to about 20% w/w of the dry components,

a weight additive, wherein the weight additive is present in a range of about 0.001% to about 30% w/w of the dry components,

a strengthening agent, wherein the strengthening agent is present in a range of about 0.001% to about 40% w/w of the dry components,

a dispersant, wherein the dispersant is present in a range of about 0.001% to about 4% w/w of the dry components,

a salt-tolerant fluid loss additive, wherein the salt-tolerant fluid loss additive is an amphoteric copolymer and wherein the salt-tolerant fluid loss additive is present in a range of about 0.001% to about 3% w/w of the dry components,

a fluid loss intensifier, wherein the fluid loss intensifier is present in a range of about 0.001% w/w to about 2%, and

a salt additive, wherein the salt additive is present in the range of about 15% to about 40% w/w; and

a base fluid, wherein the base fluid is present in an amount to balance the dry components.

12. The salt-tolerant cement slurry of claim 11, wherein the cementitious material is a hydraulic cement.

13. The salt-tolerant cement slurry of claim 11, wherein the pozzolanic material is selected from the group consisting of silica fume;

metakaolin;

fly ash;

diatomaceous earth;

calcined diatomite;

uncalcined diatomite;

calcined fullers earth;

pozzolanic clay;

calcined volcanic ash;

uncalcined volcanic ash;

bagasse ash;

pumice;

pumicite;

rice hull ash;

natural zeolite;

synthetic zeolite;

slag;

vitreous calcium aluminosilicate; and

any combination thereof.

14. The salt-tolerant cement slurry of claim 11, wherein the elastomer is selected from the group consisting of polypropylene;

polyethylene;

styrene divinyl benzene;

polyisoprene;

polybutadiene;

polyisobutylene;

polyurethane;

a styrene-butadiene random copolymer;

a styrene-butadiene block copolymer;

acrylonitrile butadiene;

acrylonitrile-styrene-butadiene; and

any combination thereof.

15. The salt-tolerant cement slurry of claim 11, wherein the weighting additive is selected from the group consisting of hausmannite ore;

barite, hermatite;

calcium carbonate;

siderite;

ilmenite; and

any combination thereof.

16. The salt-tolerant cement slurry of claim 11, wherein the strengthening agent is selected from the group consisting of silica flour;

silica fume; and

any combination thereof.

17. The salt-tolerant cement slurry of claim 11, wherein the dispersant is selected from the group consisting of sulfonated styrene maleic anhydride copolymer, sulfonated vinyltoluene maleic anhydride copolymer, sodium naphthalene sulfonate condensed with formaldehyde, sulfonated acetone condensed with formaldehyde, lignosulfonates and interpolymers of acrylic acid, allyloxybenzene sulfonate, allyl sulfonate and non-ionic monomers, and any combination thereof.

18. The salt-tolerant cement slurry of claim 11, wherein the salt-tolerant fluid loss additive is an amphoteric copolymer.

19. The salt-tolerant cement slurry of claim 11, wherein the fluid loss intensifier is selected from the group consisting of 2-acrylamido-2-methylpropane sulfonic acid;

N,N dimethyl acrylamide;

acrylamide terpolymer;

a copolymer thereof;

any derivatives thereof; and

any combination thereof.

20. The salt-tolerant cement slurry of claim 11, wherein salt tolerant cement slurry has a yield point in the range of about 5 lb/100 ft² to about 200 lb/100 ft² and a plastic viscosity in the range of about 120 cP to about 500 cP.