Lime-based cement composition

Patent metadata

Field	Value
Publication number	US-11136489-B2
Application number	US-201916571951-A
Country	US
Kind code	B2
Filing date	Sep 16, 2019
Priority date	Dec 2, 2014
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

A cement composition for use in a well that penetrates a subterranean formation comprising: hydrated lime; a silicate; and water, wherein the composition is substantially free of a hydraulic cement. A method of treating a subterranean formation comprising: introducing the cement composition into the subterranean formation; and allowing the cement composition to set.

First claim

What is claimed is:

1. A cement composition for use in a well that penetrates a subterranean formation consisting essentially of:
a slurry of:
hydrated lime;
a silicate comprising a cation selected from the group consisting of sodium, potassium, or a combination thereof; wherein the silicate is present in a concentration in the range of about 0.5% to about 15% by weight of the hydrated lime;
water;
amorphous silica in a concentration in the range of about 1% to about 150% by weight of the hydrated lime; and
optionally, one or more additives selected from the group consisting of a viscosifier, a filler, a strength enhancer, a light-weight additive, a defoaming agent, a high-density additive, a mechanical property enhancing additive, a lost-circulation material, a filtration-control additive, a thixotropic additive, and combinations thereof;
wherein the composition is substantially free of a hydraulic cement comprising Portland cement, high-aluminate cement, or slag cement,
wherein the cement composition is substantially free of fly ash.

2. The composition of claim 1 , wherein the cement composition has a density in the range of about 9 to about 22 pounds per gallon.

3. The composition of claim 1 , wherein the cement composition has a setting time of about less than 24 hours.

4. The composition of claim 1 , wherein the hydrated lime and at least the silicate react in the presence of water to form a calcium silicate hydrate gel.

5. The composition of claim 1 , wherein the cement composition develops a 10 minute gel strength of at least 20 lb/ft2 at a temperature of 80° F.

6. The composition of claim 1 , wherein the cement composition has a thickening time in the range of about 2 to about 15 hours at a temperature of 80° F.

7. The composition of claim 1 , wherein the cement composition develops a compressive strength greater than 50 psi at a temperature of 120° F., a pressure of 3,000 psi, and a time of 24 hours.

8. The composition of claim 1 , wherein the water comprises water selected from the group consisting of freshwater, brackish water, saltwater, and any combination thereof.

9. The composition of claim 4 , wherein the cement composition becomes a gel after the hydrated lime and the silicate are mixed with the water.

10. The composition of claim 1 , wherein the cement composition has a density in the range of about 12 to about 18 pounds per gallon.

11. A cement composition for use in a well that penetrates a subterranean formation consisting of:
a slurry of:
hydrated lime, wherein the hydrated lime is in powder form;
a silicate cation comprising a cation selected from the group consisting of sodium, or potassium, wherein the silicate is present in a concentration in the range of about 0.5% to about 15% by weight of the hydrated lime; and
water;
amorphous silica in a concentration in the range of about 1% to about 150% by weight of the hydrated lime; and
at least one additive selected from the group consisting of a viscosifier, a filler, a strength enhancer, a light-weight additive, a defoaming agent, a high-density additive, a mechanical property enhancing additive, a lost-circulation material, a filtration-control additive, a thixotropic additive, and combinations thereof;
wherein the cement composition is substantially free of hydraulic cement comprising Portland cement, high-aluminate cement, or slag cement;
wherein the cement composition is substantially free of fly ash.

12. The composition of claim 11 , wherein the cement composition has a setting time of about less than 24 hours.

13. The composition of claim 11 , wherein the hydrated lime and at least the silicate react in the presence of water to form a calcium silicate hydrate gel.

14. The composition of claim 13 , wherein the cement composition becomes a gel after the hydrated lime and the silicate are mixed with the water.

15. The composition of claim 11 , wherein the water comprises water selected from the group consisting of freshwater, brackish water, saltwater, and any combination thereof.

16. The composition of claim 11 , wherein the cement composition has a density in the range of about 9 to about 22 pounds per gallon.

17. The composition of claim 11 , wherein the cement composition develops a 10 minute gel strength of at least 20 lb/ft2 at a temperature of 80° F.

18. The composition of claim 11 , wherein the cement composition has a thickening time in the range of about 2 to about 15 hours at a temperature of 80° F.

19. The composition of claim 11 , wherein the cement composition develops a compressive strength greater than 50 psi at a temperature of 120° F., a pressure of 3,000 psi, and a time of 24 hours.

20. The composition of claim 11 , wherein the cement composition has a density in the range of about 12 to about 18 pounds per gallons.

Assignees

• Halliburton Energy Services Inc

Inventors

• Ravi Krishna
• Patil Sandip Prabhakar
• Singh Sheetal
• Patil Rahul Chandrakant

Classifications

• C09K8/46 Primary

  containing inorganic binders, e.g. Portland cement · CPC title

• C04B2111/1037

  Cement free compositions, e.g. hydraulically hardening mixtures based on waste materials, not containing cement as such · CPC title

• E21B33/13

  Methods or devices for cementing, for plugging holes, crevices or the like · CPC title

• C04B28/18 Primary

  containing mixtures of the silica-lime type · CPC title

• E21B21/003

  Means for stopping loss of drilling fluid (plastering the borehole wall E21B33/138) · CPC title