Set-delayed cement compositions comprising pumice and associated methods
AssigneeHalliburton Energy Services, Inc.
InventorsLance Everett Brothers, Thomas Jason 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.
Claims20
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.
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.
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.
Dependencies are inferred from the claim text.