Set-delayed cement compositions comprising pumice and associated methods
First Claim
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1. 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.
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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.
142 Citations
21 Claims
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1. A method of cementing in a subterranean formation, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of cementing in a subterranean formation, comprising:
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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. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method of cementing in a subterranean formation, comprising:
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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. - View Dependent Claims (21)
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Specification