Methods of cementing in subterranean formations using cement kiln cement kiln dust in compositions having reduced Portland cement content
The present invention includes methods of cementing in subterranean formations using cement kiln dust in compositions having reduced Portland cement content. An embodiment of a method comprises placing a sealant composition that comprises cement kiln dust and is essentially free of Portland cement in a subterranean formation; and allowing the sealant composition to set.
1. A method comprising:
placing a sealant composition that comprises cement kiln dust and is essentially free of Portland cement in a subterranean formation; and
allowing the sealant composition to set.
2. The method of claim 1 wherein the Portland cement is classified as an API class A, C, G, or H cement or an ASTM Type I, II, or III cement.
3. The method of claim 1 wherein sealant composition further comprises water.
4. The method of claim 1 wherein the sealant composition consists essentially of the cement kiln dust and water.
5. The method of claim 1 wherein the sealant composition further comprises a natural pozzolan.
6. The method of claim 1 wherein the sealant composition further comprises pumicite.
7. The method of claim 1 wherein the sealant composition further comprises pumicite and lime.
8. The method of claim 1 wherein the sealant composition further comprises pumicite in a pumicite to cement kiln dust weight ratio of about 65/35 to about 80/20, and wherein the sealant composition further comprises lime in an amount of about 5% to about 15% by combined weight of the natural pozzolan and the cement kiln dust.
9. The method of claim 1 wherein the sealant composition further comprises an additive selected from the group consisting of fly ash, slag cement, metakaolin, shale, zeolite, and any combination thereof.
10. The method of claim 1 wherein the sealant composition further comprises an additive selected from the group consisting of a strength-retrogression additive, a set accelerator, a set retarder, 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.
11. The method of claim 1 wherein the sealant composition further comprises an additive selected from the group consisting of crystalline silica, amorphous silica, fumed silica, a salt, a fiber, a hydratable clay, a microsphere, rice husk ash, an elastomer, an elastomeric particle, a resin, latex, and any combination thereof.
12. The method of claim 1 wherein the sealant composition is foamed.
13. The method of claim 1 wherein the sealant composition is extended.
14. The method of claim 1 wherein allowing the sealant composition to set comprises allowing the sealant composition to set in an annulus between the subterranean formation and a conduit disposed in the subterranean formation.
15. The method of claim 1 wherein allowing the sealant composition to set comprises allowing the sealant composition to set so as to seal a void located in a conduit disposed in the subterranean formation, located in a cement sheath in an annulus between the conduit and the subterranean formation, and/or located in an annulus between the cement sheath and the subterranean formation.
16. The method of claim 1 wherein allowing the sealant composition to set comprises allowing the sealant composition to set so as to seal a portion of a gravel pack.
17. A method comprising:
placing a hydraulic sealant composition that comprises cement kiln dust and water and is essentially free of Portland cement in a subterranean formation; and
allowing the hydraulic sealant composition to set.
18. The method of claim 17 wherein the Portland cement is classified as an API class A, C, G, or H cement or an ASTM Type I, II, or III cement.
19. The method of claim 17 wherein the hydraulic sealant composition consists essentially of the cement kiln dust and the water.
20. The method of claim 17 wherein the hydraulic sealant composition further comprises a natural pozzolan.
21. The method of claim 17 wherein the hydraulic sealant composition further comprises pumicite.
22. The method of claim 17 wherein the hydraulic sealant composition further comprises pumicite and lime.
23. The method of claim 17 wherein the hydraulic sealant composition further comprises pumicite in a pumicite to cement kiln dust weight ratio of from about 65/35 to about 80/20, and wherein the sealant composition further comprises lime in an amount of about 5% to about 15% by combined weight of the natural pozzolan and the cement kiln dust.
24. The method of claim 17 wherein the hydraulic sealant composition comprises an additive selected from the group consisting of fly ash, slag cement, metakaolin, shale, zeolite, and any combination thereof.
25. The method of claim 17 wherein the hydraulic sealant composition comprises an additive selected from the group consisting of a strength-retrogression additive, a set accelerator, a set retarder, 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.
26. The method of claim 17 wherein the hydraulic sealant composition comprises an additive selected from the group consisting of crystalline silica, amorphous silica, fumed silica, a salt, a fiber, a hydratable clay, a microsphere, rice husk ash, an elastomer, an elastomeric particle, a resin, latex, and any combination thereof.
27. The method of claim 17 wherein the hydraulic sealant composition is foamed.
28. The method of claim 17 wherein the hydraulic sealant composition is extended.
29. The method of claim 17 wherein allowing the hydraulic sealant composition to set comprises allowing the hydraulic sealant composition to set in an annulus between the subterranean formation and a conduit disposed in the subterranean formation.
30. The method of claim 17 wherein allowing the hydraulic sealant composition to set comprises allowing the hydraulic sealant composition to set so as to seal a void located in a conduit disposed in the subterranean formation, located in a cement sheath in an annulus between the conduit and the subterranean formation, and/or located in an annulus between the cement sheath and the subterranean formation.
31. The method of claim 17 wherein allowing the hydraulic sealant composition to set comprises allowing the hydraulic sealant composition to set so as to seal a portion of a gravel pack.
32. A method comprising:
placing a hydraulic sealant composition in a subterranean formation, wherein the hydraulic sealant composition consists essentially of:
pumicite,
lime,
cement kiln dust,
water, and
an additive selected from the group consisting of a strength-retrogression additive, a set accelerator, a set retarder, 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, a gas, and any combination thereof; and
allowing the hydraulic cement composition to set.