Set-delayed cement compositions comprising pumice and associated methods
AssigneeHalliburton Energy Services, Inc.
InventorsLance E. Brothers, Thomas J. Pisklak
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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.
Claims21
A method of cementing in a subterranean formation, 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;
- introducing the set-delayed cement composition into a subterranean formation;
- and
- allowing the set-delayed cement composition to set in the subterranean formation.
A method of cementing in a subterranean formation, 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;
- introducing the set-delayed cement composition into a subterranean formation;
- and
- allowing the set-delayed cement composition to set in the subterranean formation.
A method of cementing in a subterranean formation, comprising:
- providing a 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, wherein the water is present in an amount of about 33% to about 200% by weight of the pumice, wherein the hydrated lime is present in an amount of about 10% to about 100% by weight of the pumice;
- storing the cement composition in a pumpable fluid state for a period of about 1 day or longer;
- activating the cement composition;
- introducing the cement composition into a space between a wellbore wall and a subterranean formation;
- and
- allowing the cement composition to set in the space.
Dependencies are inferred from the claim text.