Set-delayed cement compositions comprising pumice and associated methods

Patent metadata

Field	Value
Publication number	US-9260343-B2
Application number	US-201414478869-A
Country	US
Kind code	B2
Filing date	Sep 5, 2014
Priority date	Mar 9, 2012
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A variety of methods and compositions are disclosed, including, in one embodiment, a method of cementing in a subterranean formation, comprising: providing a set-delayed cement composition comprising water, pumice, hydrated lime, and a set retarder; activating 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.

First claim

What is claimed is:

1. A method of cementing comprising:
providing a set-delayed cement composition comprising water, pumice, hydrated lime, a dispersant, and a set retarder, wherein the set retarder comprises a phosphonic acid derivative and the dispersant comprises a polycarboxylated ether dispersant;
activating the set-delayed cement composition;
placing the set-delayed cement composition; and
allowing the set-delayed cement composition to set.

2. The method of claim 1 wherein the pumice has a mean particle size in a range of about 1 micron to about 200 microns.

3. The method of claim I 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.

4. The method of claim 1 wherein set-delayed cement composition has a pumice-to-hydrated-lime weight ratio of about 3:1 to about 5:1, wherein the set retarder is present in an amount of about 0.01% to about 2% by weight of the pumice, and wherein the polycarboxylated ether dispersant is present in an amount of about 0.01% to about 2% by weight of the pumice.

5. The method of claim 1 wherein the set-delayed cement composition further comprises at least one additive selected from the group consisting of 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 defoaming agent, a foaming agent, a thixotropic additive, and any combination thereof.

6. 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.

7. 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 30 days prior to the activating.

8. The method of claim 1 wherein the activating comprises adding a cement set accelerator to the set-delayed cement composition.

9. The method of claim 1 further comprising measuring the 24 hour compressive strength of the set-delayed cement composition with an Ultrasonic Cement Analyzer at 140° F. while maintained at 3,000 psi wherein the 24 hour compressive strength measurement is at least about 50 psi.

10. The method of claim 1 wherein the set-delayed cement composition is introduced into a well bore penetrating the subterranean formation, the well bore having a bottom-hole static temperature of less than about 200° F.

11. The method of claim 1 wherein the set-delayed cement composition is introduced into an annulus between a wall of a well bore and a conduit disposed in the well bore.

12. A method of cementing comprising:
providing a set-delayed cement composition comprising water, pumice, hydrated lime, a dispersant, and a set retarder, wherein the set retarder comprises a phosphonic acid derivative and the dispersant comprises a polycarboxylated ether dispersant;
storing the set-delayed cement composition for a period of at least about 1 day;
adding a cement set accelerator to the set-delayed cement composition;
placing the set-delayed cement composition; and
allowing the set-delayed cement composition to set.

13. 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.

14. The method of claim 12 wherein the set-delayed cement composition is stored for a time period of at least about 30 days.

15. The method of claim 12 wherein the pumice has a mean particle size in a range of about 1 micron to about 200 microns.

16. The method of claim 12 wherein the set-delayed cement composition has a pumice-to-hydrated-time weight ratio of about 3:1 to about 5:1, wherein the set retarder is present in an amount of about 0.01% to about 2% by weight of the pumice, and wherein the polycarboxylated ether dispersant is present in an amount of about 0.01% to about 2% by weight of the pumice.

17. The method of claim 12 wherein the set-delayed cement composition further comprises at least one additive selected from the group consisting of 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 defoaming agent, a foaming agent, a thixotropic additive, and any combination thereof.

18. The method of claim 12 wherein the set-delayed cement composition remains in a pumpable fluid state bar a time period of at least about 7 days prior to the activating.

19. The method of claim 12 further measuring the 24 hour compressive strength of the set-delayed cement composition with an Ultrasonic Cement Analyzer at 140° F. while maintained at 3,000 psi, wherein the 24 hour compressive strength measurement is at least about 50 psi.

20. The method of claim 12 wherein the set-delayed cement composition is introduced into a well bore penetrating a subterranean formation, the well bore having a bottom-hole static temperature of less than about 200° F.

Assignees

• Halliburton Energy Services Inc

Inventors

• Brothers Lance Everett
• Pisklak Thomas Jason

Classifications

• C04B24/163

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C04B22/082

  Acids · CPC title

• C04B24/383

  Cellulose or derivatives thereof · CPC title

• C04B24/18

  Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye · CPC title

• C04B2103/408

  Dispersants · CPC title