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1. WO2020117188 - MATÉRIAU CIMENTAIRE COMPOSITE POUR DES COMPOSITIONS DE CIMENT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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CLAIMS

What is claimed is:

1. A method of cementing comprising:

providing a cement composition comprising:

a composite cementitious material comprising a micronized particulate solid and a monophase amorphous hydraulic binder, wherein the micronized particulate solid has a mean particle size of about 500 microns or less; and

water

introducing the cement composition into a subterranean formation; and allowing the cement composition to set.

2. The method of claim 1, wherein the cement composition is allowed to set in a wellbore annulus to form a cement sheath.

3. The method of claim 1, wherein the cementing composition is allowed to set in the wellbore to form a plug.

4. The method of claim 1, wherein the introducing comprises pumping the cement composition downhole through a casing string.

5. The method of claim 1 , wherein the monophase amorphous hydraulic binder is deposited on the micronized particulate solid.

6. The method of claim 5, wherein the micronized particulate solid comprises a pozzolanic substrate on which the monophase amorphous hydraulic binder is deposited.

7. The method of claim 1, wherein the monophase amorphous hydraulic binder is at least partially coated on the micronized particulate solid.

8. The method of claim 1, wherein the micronized particulate solid comprises at least one material selected from the group consisting of pumice, fly ash, quartz, micronized crystalline silica, slag, metakaolin, perlite, natural glasses, rice husk ash, sugar cane ash, bioashes, cement kiln dust, and any combination thereof.

9. The method of claim 1, wherein the monophase amorphous hydraulic binder comprises at least one material selected from the group consisting of alpha-dicalciumsilicate hydrate, calcium silica hydrate gel, tricalciumsilicate hydrate, and any combination thereof.

10. The method of claim 1, wherein the composite cementitious material has a mean particle size of about 1 micron to about 500 microns.

1 1. The method of claim 1, wherein the composite cementitious material has a weight ratio of the monophase amorphous hydraulic binder to the micronized particulate solid of about 4:1 to about 1 :4.

12. The method of claim 1, wherein the composite cementitious material is present in the cement composition in an amount of about 20% to about 80% by weight of the cement composition.

13. The method of claim 1, wherein the cement composition comprises a blend of cementitious components comprising the composite cement material and at least one additional cementitious component.

14. The method of claim 1, wherein the introducing comprises pumping the cement composition downhole through a casing string such that the cement composition sets in a wellbore annulus, wherein the cement composition comprises a blend of cementitious components comprising the composite cement material, fly ash, and Portland cement, wherein the composite cementitious material is present in the cement composition in an amount of about 20% to about 80% by weight of the cement composition, wherein the monophase amorphous hydraulic binder is deposited on the micronized particulate solid, wherein the composite cementitious material has a weight ratio of the monophase amorphous hydraulic binder to the micronized particulate solid about 4: 1 to about 1 :1, wherein composite cementitious material has a mean particle size of about 1 micron to about 100 microns, and wherein the micronized particulate solid comprises a pozzolanic substrate on which the monophase amorphous hydraulic binder is deposited.

15. A cement composition comprising:

a composite cementitious material comprising a micronized particulate solid and a monophase amorphous hydraulic binder, wherein the micronized particulate solid has a mean particle size of about 500 microns or less; and

water.

16. The cement composition of claim 15, wherein the monophase amorphous hydraulic binder is deposited on the micronized particulate solid.

17. The cement composition of claim 16, wherein the micronized particulate solid comprises a pozzolanic substrate on which the monophase amorphous hydraulic binder is deposited.

18. The cement composition of claim 15, wherein the micronized particulate solid comprises at least one material selected from the group consisting of pumice, fly ash, quartz, micronized crystalline silica, slag, metakaolin, perlite, natural glasses, rice husk ash, sugar cane ash, bioashes, cement kiln dust, and any combination thereof, and wherein the monophase amorphous hydraulic binder comprises at least one material selected from the group consisting of alpha-dicalciumsilicate hydrate, calcium silica hydrate gel, tricalciumsilicate hydrate, and any combination thereof.

19. The cement composition of claim 15, wherein the composite cementitious material has a mean particle size of about 1 micron to about 500 microns.

20. The cement composition of claim 15, wherein the composite cementitious material is present in the cement composition in an amount of about 20% to about 80% by weight of the cement composition.