Cement compositions and associated methods comprising sub-micron calcium carbonate and latex
Methods and compositions are provided that relate to cement compositions and methods comprising sub-micron calcium carbonate and latex. An embodiment includes a method of cementing in a subterranean formation. The method may comprise introducing a cement composition into the subterranean formation, wherein the cement composition comprises cement, water, sub-micron calcium carbonate, and latex. The method further may comprise allowing the cement composition to set in the subterranean formation. Another embodiment includes a cement composition that may comprise cement, water, a sub-micron calcium carbonate, and latex.
1. A method of cementing in a subterranean formation:
introducing a cement composition into the subterranean formation, wherein the cement composition comprises cement, water, sub-micron calcium carbonate having a particle size in the range of greater than 100 nm to about 1 micron, and latex; and
allowing the cement composition to set in the subterranean formation.
2. The method of claim 1 wherein the cement comprises at least one 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 combinations thereof.
3. The method of claim 1 wherein the sub-micron calcium carbonate comprises a colloidal suspension in a base fluid.
4. The method of claim 1 wherein the sub-micron calcium carbonate is provided in a dry form.
5. The method of claim 1 wherein the sub-micron calcium carbonate has a particle size in the range of about 200 nm to about 800 nm.
6. The method of claim 5 wherein the sub-micron calcium carbonate is present in the cement composition in an amount in the range of about 0.1% to about 10% by weight of the cement on a dry basis.
7. The method of claim 1 wherein the latex comprises at least one rubber material selected from the group consisting of natural rubber, modified natural rubber, synthetic rubber, and combinations thereof.
8. The method of claim 1 wherein the latex comprises at least one synthetic rubber material selected from the group an ethylene-propylene rubber, a styrene-butadiene rubber, a nitrile rubber, a nitrile butadiene rubber, a butyl rubber, a neoprene rubber, a polybutadiene rubber, an acrylonitrile-styrene-butadiene rubber, a polyisoprene rubber, and combinations thereof.
9. The method of claim 1 wherein the latex comprises a water-in-oil emulsion that comprises styrene-butadiene rubber.
10. The method of claim 1 wherein the cement composition further comprises at least one additive selected from the group consisting of a latex stabilizer, 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 fluid loss control additive, a dispersant, a defoaming agent, a foaming agent, a thixotropic additive, and combinations thereof.
11. The method of claim 1 wherein the cement composition further comprises at least one additive selected from the group consisting of crystalline silica, amorphous silica, fumed silica, a salt, a fiber, a hydratable clay, calcined shale, vitrified shale, a microsphere, fly ash, slag, diatomaceous earth, metakaolin, rice husk ash, natural pozzolan, zeolite, cement kiln dust, lime, an elastomers, a resin, and combinations thereof.
12. The method of claim 1 wherein introducing the cement composition into the subterranean formation comprises introducing the cement composition into a space between a pipe string and a wall of a well bore that penetrates the subterranean formation.
13. The method of claim 1 further comprising introducing the pipe string into the well bore.
14. A method of cementing in a subterranean formation:
introducing a cement composition into a space between the subterranean formation and a conduit disposed in the subterranean formation, wherein the cement composition comprises cement, water, sub-micron calcium carbonate, and latex, and wherein the sub-micron calcium carbonate has a particle size in a range of about 200 nm to about 800 nm and is present in an amount of at least about 0.1 gallons per 94-pound sack of the cement; and
allowing the cement composition to set in the space.
15. The method of claim 14 wherein the sub-micron calcium carbonate comprises a colloidal suspension in a base fluid.
16. The method of claim 14 wherein the cement composition further comprises at least one additive selected from the group consisting of a latex stabilizer, 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 fluid loss control additive, a dispersant, a defoaming agent, a foaming agent, a thixotropic additive, and combinations thereof.
17. The method of claim 14 wherein the cement composition further comprises at least one additive selected from the group consisting of crystalline silica, amorphous silica, fumed silica, a salt, a fiber, a hydratable clay, calcined shale, vitrified shale, a microsphere, fly ash, slag, diatomaceous earth, metakaolin, rice husk ash, natural pozzolan, zeolite, cement kiln dust, lime, an elastomers, a resin, and combinations thereof.
18. The method of claim 14 wherein the latex comprises a water-in-oil emulsion that comprises styrene-butadiene rubber.
19. The method of claim 14 further comprising introducing the conduit into the subterranean formation.
20. The method of claim 1 wherein the sub-micron calcium carbonate is present in an amount in the range of about 0.8% to about 3% by weight of the cement on a dry basis.