Acid-Soluble Cement Compositions Comprising Cement Kiln Dust and/or a Natural Pozzolan and Methods of Use

• US 20140076204A1
• Filed: 09/19/2012
• Published: 03/20/2014
• Est. Priority Date: 09/09/2005
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Brenneis, D. Chad, Roddy, Craig W., Benkley, James R., DePlacido, Preston, Caveny, William J., Morgan, Rickey L., Morgan, Ronnie G.
• Granted Patent: US 9,023,150 B2
• Time in Patent Office: Days
• US Class Current: 106/716
• CPC Class Codes: C04B 14/16 porous, e.g. pumice
• CPC Class Codes: C04B 14/26 Carbonates
• CPC Class Codes: C04B 14/28 of calcium
• CPC Class Codes: C04B 18/162 Cement kiln dust; Lime kiln dust
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 28/32 Magnesium oxychloride cements, e.g. Sorel cement
• CPC Class Codes: C04B 40/0092 Temporary binders, mortars or concrete, i.e. materials intended to be destroyed or removed after hardening, e.g. by acid dissolution
• CPC Class Codes: C09K 8/467 containing additives for specific purposes
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Abstract

The present invention relates to acid-soluble cement compositions that comprise cement kiln dust (“CKD”) and/or a natural pozzolan and associated methods of use. An embodiment includes a method of cementing comprising: placing an acid-soluble cement composition in a subterranean formation, wherein the acid-soluble cement composition comprises a hydraulic cement, a component selected from the group consisting of CKD, pumicite, and a combination thereof, and water; allowing the acid-soluble cement composition to set; and contacting the set acid-soluble cement composition with an acid to dissolve the set acid-soluble cement composition.

Claims

1. An acid-soluble cement composition comprising:

hydraulic cement;

a component selected from the group consisting of cement kiln dust, pumicite, and a combination thereof; and

water,

wherein the acid-soluble cement composition has a solubility of at least about 83% when contacted for 30 minutes by an aqueous acid composition comprising 15% hydrochloric acid by weight of the acid-soluble cement composition.

2. The composition of claim 1 wherein the acid-soluble cement composition has a density of about 8 pounds per gallon to about 16 pounds per gallon, and wherein the water is present in an amount of about 40% to about 200% by weight of cementitious components in the acid-soluble cement composition.

3. The composition of claim 1 wherein the hydraulic cement comprises a hydraulic cement selected from the group consisting of a Portland cement, a pozzolana cement, a gypsum cement, a high alumina content cement, a slag cement, a silica cement, and any combination thereof.

4. The composition of claim 1 wherein the hydraulic cement comprises a Sorel cement.

5. The composition of claim 1 wherein the hydraulic cement comprises a magnesium oxide and a magnesium chloride.

6. The composition of claim 1 wherein the hydraulic cement is present in an amount of about 0% to about 20% by weight of cementitious components in the acid-soluble cement composition.

7. The composition of claim 1 wherein the component comprises the cement kiln dust in an amount of about 20% to about 100% by weight of cementitious components in the acid-soluble cement composition.

8. The composition of claim 1 wherein the component comprises the pumicite in an amount of about 20% to about 100% by weight of cementitious components in the acid-soluble cement composition.

9. The composition of claim 8 wherein the acid-soluble cement composition further comprises a source of calcium ions.

10. The composition of claim 1 wherein the acid-soluble cement composition further comprises hydrated lime in an amount of about 1% to about 40% by weight of cementitious components in the acid-soluble cement composition.

11. The composition of claim 1 wherein the acid-soluble cement composition further comprises an acid-soluble filler.

13. The composition of claim 1 wherein the acid-soluble cement composition further comprises an additive selected from the group consisting of fly ash, slag cement, metakaolin, shale, zeolite, crystalline silica, amorphous silica, fumed silica, salt, fiber, hydratable clay, microsphere, rice husk ash, elastomer, elastomeric particle, resin, latex, and any combination thereof.

14. The composition of claim 1 wherein the acid-soluble cement composition further comprises an additive selected from the group consisting of a set retarding additive, a strength-retrogression additive, a set accelerator, a weighting agent, a lightweight additive, a gas-generating additive, a mechanical property enhancing additive, a lost-circulation material, a filtration-control additive, a dispersant, a fluid loss control additive, a defoaming agent, a foaming agent, an oil-swellable particle, a water-swellable particle, a thixotropic additive, and any combination thereof.

15. The composition of claim 1 wherein the solubility of the acid-soluble cement composition is at least about 90% when contacted for 30 minutes by the aqueous acid composition comprising 15% hydrochloric acid by weight of the acid-soluble cement composition.

12. The composition of claim 12 wherein the acid-soluble filler comprises a material selected from the group consisting of dolomite, magnesium carbonate, calcium carbonate, zinc carbonate, and any combination thereof.

16. A acid-soluble cement composition comprising:

0% to about 20% Portland cement by weight of cementitious components present in the acid-soluble cement composition;

cement kiln dust;

an acid-soluble filler; and

water,

wherein the acid-soluble cement composition has a solubility of at least about 83% when contacted for 30 minutes by an aqueous acid composition comprising 15% hydrochloric acid by weight of the acid-soluble cement composition.

17. The composition of claim 16 wherein the cement kiln dust is present in an amount of about 70% to about 100% by weight of the cementitious components in the acid-soluble cement composition.

18. The composition of claim 16 wherein the cement kiln dust is present in an amount of about 90% to about 100% by weight of the cementitious components in the acid-soluble cement composition.

19. The composition of claim 16 wherein the acid-soluble filler comprises a material selected from the group consisting of dolomite, magnesium carbonate, calcium carbonate, zinc carbonate, and any combination thereof.

20. The composition of claim 16 wherein the acid-soluble filler is present in an amount of about 50% to about 400% by weight of the cementitious components in the acid-soluble cement composition.

21. The composition of claim 16 wherein the acid-soluble filler comprises the calcium carbonate and is present in an amount of about 10% to about 300% by weight of the cementitious components in the acid-soluble cement composition.

22. The composition of claim 16 wherein the solubility of the acid-soluble cement composition is at least about 90% when contacted for 30 minutes by the aqueous acid composition comprising 15% hydrochloric acid by weight of the acid-soluble cement composition.

23. An acid-soluble cement composition comprising:

hydraulic cement;

pumicite in an amount of about 20% to about 100% by weight of cementitious components present in the acid-soluble cement composition; and

water,

wherein the acid-soluble cement composition has a solubility of at least about 83% when contacted for 30 minutes by an aqueous acid composition comprising 15% hydrochloric acid by weight of the acid-soluble cement composition.

24. The composition of claim 23 wherein the acid-soluble cement composition further comprises an acid-soluble filler selected from the group consisting of dolomite, magnesium carbonate, calcium carbonate, zinc carbonate, and any combination thereof.

25. The composition of claim 23 wherein the acid-soluble cement composition further comprises an acid-soluble filler present in an amount of about 50% to about 400% by weight of the cementitious components in the acid-soluble cement composition.

26. The composition of claim 23 wherein the acid-soluble cement composition further comprises calcium carbonate in an amount of about 10% to about 300% by weight of the cementitious components in the acid-soluble cement composition.

27. The composition of claim 23 wherein the solubility of the acid-soluble cement composition is at least about 90% when contacted for 30 minutes by the aqueous acid composition comprising 15% hydrochloric acid by weight of the acid-soluble cement composition.