Use of synthetic smectite in set-delayed cement compositions

Patent metadata

Field	Value
Publication number	US-9580638-B2
Application number	US-201314098198-A
Country	US
Kind code	B2
Filing date	Dec 5, 2013
Priority date	Mar 9, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

Disclosed herein are cement compositions and methods of using set-delayed cement compositions in subterranean formations. In one embodiment a method of cementing in a subterranean formation is described. The method comprises providing a set-delayed cement composition comprising pumice, hydrated lime, a cement set retarder, a synthetic smectite, and water; introducing the set-delayed cement composition into a subterranean formation; and allowing the set-delayed cement composition to set in the subterranean formation.

First claim

What is claimed is:

1. A method of cementing in a subterranean formation comprising:
providing a set-delayed cement composition comprising pumice, hydrated lime, a a phosphonic acid derivative cement set retarder, and water;
storing the set-delayed cement composition in a pumpable fluid state for a time period of at least about 1 day;
reducing the density of the set-delayed cement composition by adding a liquid additive comprising a synthetic smectite and water after the step of storing the set-delayed cement composition;
activating the set-delayed cement composition after the step of storing the set-delayed cement composition;
introducing the set-delayed cement composition into a subterranean formation; and
allowing the set-delayed cement composition to set in the subterranean formation.

2. The method of claim 1 wherein the density of the set-delayed cement composition is reduced to a range of about 4 pounds per gallon to about 12 pounds per gallon.

3. The method of claim 1 wherein the set-delayed cement composition comprises a mechanical-property-enhancing additive.

4. The method of claim 3 wherein the mechanical-property enhancing additive comprises carbon fibers.

5. The method of claim 1 wherein the set-delayed cement composition comprises polyethyleneimine.

6. The method of claim 1 wherein the set-delayed cement composition has a density in a range of about 8 pounds per gallon to about 14 pounds per gallon.

7. The method of claim 1 wherein the pumice has a mean particle size in a range of about 10 micron to about 25 microns.

8. The method of claim 1 wherein the pumice and the hydrated lime are present in a weight ratio of pumice to hydrated lime of about 10:1 to about 1:1.

9. The method of claim 1 wherein the set-delayed cement composition further comprises a dispersant and wherein the dispersant comprises at least one dispersant selected from the group consisting of a sulfonated-formaldehyde-based dispersant, a polycarboxylated ether dispersant, and any combination thereof.

10. The method of claim 1 wherein the set-delayed cement composition remains in a pumpable fluid state for a time period of at least about 7 days prior to the activating.

11. The method of claim 1 wherein the step of activating comprises adding a cement set activator to the set-delayed cement composition.

12. A method of cementing in a subterranean formation comprising:
providing a set-delayed cement composition comprising pumice, hydrated lime, a cement set retarder, and water;
storing the set-delayed cement composition in a pumpable fluid state for a time period of at least about 7 days;
reducing the density of the set-delayed cement composition by adding a liquid additive comprising a synthetic trioctahedral smectite and water after the step of storing the set-delayed cement composition;
activating the set-delayed cement composition after the step of storing the set-delayed cement composition;
introducing the set-delayed cement composition into a subterranean formation having a bottom hole static temperature of less than about 200° F.; and
allowing the set-delayed cement composition to set in the subterranean formation.

13. The method of claim 12 wherein the density of the set-delayed cement composition is reduced to a range of about 4 pounds per gallon to about 12 pounds per gallon.

14. The method of claim 12 wherein the set-delayed cement composition comprises polyethyleneimine.

15. The method of claim 12 wherein the pumice and the hydrated lime are present in a weight ratio of pumice to hydrated lime of about 10:1 to about 1:1.

16. The method of claim 12 wherein the cement set retarder comprises at least one retarder selected from the group consisting of a phosphonic acid, a phosphonic acid derivative, a lignosulfonate, a salt, an organic acid, a carboxymethylated hydroxyethylated cellulose, a synthetic co- or ter-polymer comprising sulfonate and carboxylic acid groups, a borate compound, and any mixture thereof.

17. The method of claim 12 wherein the set-delayed cement composition further comprises a dispersant and wherein the dispersant comprises at least one dispersant selected from the group consisting of a sulfonated-formaldehyde-based dispersant, a polycarboxylated ether dispersant, and any combination thereof.

Assignees

• Halliburton Energy Services Inc

Inventors

• Boul Peter James
• Agapiou Kyriacos
• Pisklak Thomas Jason
• Morgan Ronnie Glen
• Brothers Lance Everett
• Otieno Pauline Akinyi

Classifications

• C04B2103/46

  Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents · CPC title

• C09K2208/08

  Fiber-containing well treatment fluids · CPC title

• C04B2103/22

  Set retarders · CPC title

• C04B24/28

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds {(C04B24/243 takes precedence)} · CPC title

• C04B2103/12

  Set accelerators · CPC title