Geopolymer cement compositions and methods of use
Methods and compositions for cementing operations that include pumice in geopolymer cement compositions comprising slag.
1. A method of cementing comprising:
providing a geopolymer cement composition consisting of:
a cementitious component consisting essentially of slag and pumice;
hydrated lime;
an additive selected from the group consisting of crystalline silica, amorphous silica, fumed silica, a fiber, a hydratable clay, calcined shale, vitrified shale, a microsphere, diatomaceous earth, metakaolin, ground perlite, rice husk ash, zeolite, a resin, a dispersant, a defoaming agent, a set retarder, a weighting agent, a lightweight additive, a gas-generating additive, a lost-circulation material, a filtration-control additive, a fluid-loss-control additive, a foaming additive, a thixotropic additive, and any combination thereof; and
water; and
allowing the geopolymer cement composition to set; wherein the geopolymer cement composition does not comprise a set accelerator.
2. The method of claim 1 , wherein the geopolymer cement composition has a density of about 12 pounds per gallon to about 20 pounds per gallon.
3. The method of claim 1 , wherein the slag is present in an amount in a range of from about 40% to about 100% by weight of the cementitious component.
4. The method of claim 1 , wherein the pumice is present in an amount in a range of from about 0.1% to about 60% by weight of the cementitious component.
5. The method of claim 1 , wherein the slag is present in an amount in a range of from about 40% to about 60% by weight of the cementitious component, and wherein the pumice is present in an amount in a range of from about 40% to about 60% by weight of the cementitious component.
6. The method of claim 1 , wherein the cementitious component consists of the slag and the pumice.
7. The method of claim 6 , wherein the geopolymer cement composition is free of any additional cementitious materials.
8. The method of claim 1 , wherein the hydrated lime is present in an amount in a range of from about 0.1% to about 25% by weight of the cementitious component.
9. The method of claim 1 , further comprising introducing the geopolymer cement composition into a subterranean formation.
10. The method of claim 9 , wherein introducing the geopolymer cement composition into a subterranean formation comprises introducing the geopolymer cement composition into a well-bore annulus.
11. The method of claim 1 , wherein the geopolymer cement composition is used in a primary cementing operation.
12. The method of claim 1 , wherein inclusion of the pumice in the geopolymer cement composition increases the 24-hour compressive strength of the geopolymer cement composition at 180° F. in an amount of at least about 5% as compared to replacement of the pumice with additional slag.
13. A method of cementing comprising:
preparing a geopolymer cement composition consisting of water, hydrated lime, an additive, and a cementitious component comprising slag and pumice, wherein the additive is selected from the group consisting of crystalline silica, amorphous silica, fumed silica, a fiber, a hydratable clay, calcined shale, vitrified shale, a microsphere, diatomaceous earth, metakaolin, ground perlite, rice husk ash, zeolite, a resin, a dispersant, a defoaming agent, a set retarder, a weighting agent, a lightweight additive, a gas-generating additive, a lost-circulation material, a filtration-control additive, a fluid-loss-control additive, a foaming additive, a thixotropic additive, and any combination thereof;
introducing the geopolymer cement composition into a subterranean formation; and
allowing the geopolymer cement composition to set; wherein the geopolymer cement composition does not comprise a set accelerator.
14. The method of claim 13 , wherein the slag is present in an amount in a range of from about 40% to about 60% by weight of the cementitious component, and wherein the pumice is present in an amount in a range of from about 40% to about 60% by weight of the cementitious component.
15. The method of claim 13 , wherein the cementitious component consists of the slag and the pumice.
16. The method of claim 15 , wherein the geopolymer cement composition is free of any additional cementitious materials.
17. The method of claim 13 , wherein the hydrated lime is present in an amount in a range of from about 0.1% to about 25% by weight of the cementitious component.
18. The method of claim 13 , wherein introducing the geopolymer cement composition into a subterranean formation comprises introducing the geopolymer cement composition into a well-bore annulus.
19. The method of claim 13 , wherein inclusion of the pumice in the geopolymer cement composition increases the 24-hour compressive strength of the geopolymer cement composition at 180° F. in an amount of at least about 5% as compared to replacement of the pumice with additional slag.
20. A method of cementing comprising:
providing a geopolymer cement composition consisting of:
a cementitious component consisting of slag in an amount in a range of from about 40% to about 60% by weight of the cementitious component and pumice in an amount in a range of from about 40% to about 60% by weight of the cementitious component, wherein the geopolymer cement composition is free of any additional cementitious component;
hydrated lime in an amount in a range of from about 0.1% to about 20% by weight of the cementitious component;
an additive selected from the group consisting of crystalline silica, amorphous silica, fumed silica, a fiber, a hydratable clay, calcined shale, vitrified shale, a microsphere, diatomaceous earth, metakaolin, ground perlite, rice husk ash, zeolite, a resin, a dispersant, a defoaming agent, a set retarder, a weighting agent, a lightweight additive, a gas-generating additive, a lost-circulation material, a filtration-control additive, a fluid-loss-control additive, a foaming additive, a thixotropic additive, and any combination thereof; and
water;
introducing the geopolymer cement composition into a well bore annulus in a subterranean formation during a primary cementing operation; and
allowing the geopolymer cement composition to set, wherein inclusion of the pumice in the geopolymer cement composition increases the 24-hour compressive strength of the geopolymer cement composition at 180° F. in an amount of at least about 30% as compared to replacement of the pumice with additional slag; wherein the geopolymer cement composition does not comprise a set accelerator.