Use of Synthetic Smectite in Set-Delayed Cement Compositions Comprising Pumice

Patent metadata

Field	Value
Publication number	US-2017130119-A1
Application number	US-201715415558-A
Country	US
Kind code	A1
Filing date	Jan 25, 2017
Priority date	Mar 9, 2012
Publication date	May 11, 2017
Grant date	—

Abstract

Disclosed herein are cement compositions using set-delayed cement compositions in subterranean formations. The composition may comprise a set-delayed cement composition comprising pumice, hydrated lime, a cement set retarder, a synthetic smectite, and water.

First claim

What is claimed is:

1 . A set-delayed cement composition for cementing in a subterranean formation comprising:
pumice, hydrated lime, a cement set retarder, a synthetic smectite, and water.

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

3 . The composition 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.

4 . The composition of claim 1 wherein the hydrated lime is provided as calcium oxide.

5 . The composition of claim 1 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.

6 . The composition of claim 1 wherein the set retarder is present in an amount of about about 0.01% to about 5% by weight of the water.

7 . The composition of claim 1 wherein the synthetic smectite has a thickness of less than about 100 nm and lateral dimensions of in a range of about 1 to about 100 nm, the synthetic smectite being present in an amount of about 0.01% to about 5% by weight of the water

8 . The composition of claim 1 wherein the water is present in the set-delayed cement composition in an amount in the range of from about 33% to about 200% by weight of the pumice, the set-delayed cement composition having a density in a range of about 8 pounds per gallon to about 14 pounds per gallon.

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

10 . The composition of claim 11 wherein the mechanical-property enhancing additive comprises carbon fibers.

11 . The composition of claim 11 wherein the mechanical-property-enhancing additives are be present in an amount from about 0.01% to about 5% by weight of the pumice.

12 . The composition of claim 1 wherein the set-delayed cement composition further comprises polyethyleneimine.

13 . The composition 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.

14 . The composition of claim 1 further comprising a viscosifier wherein the viscosifier is present in an amount of about 0.01% to about 0.5% by weight of the pumice

15 . The composition of claim 1 further comprising a cement set activator wherein the cement set activator is selected from the group consisting of zeolites, amines, silicates, zinc formate; calcium acetate; Groups IA and IIA hydroxides, monovalent salts, divalent salts, nanosilica, polyphosphates; and combinations thereof.

16 . The composition of claim 1 further comprising an activator comprising a polyphosphate and a monovalent salt.

17 . The composition of claim 16 wherein the polyphosphate comprises a polymeric metaphosphate salt.

18 . A set-delayed cement composition for cementing in a subterranean formation comprising:
pumice, hydrated lime, a cement set retarder, a synthetic smectite, a mechanical property enhancing additive comprising carbon fibers; and water; wherein the set-delayed cement composition is capable of remaining in a pumpable fluid state for a time period of at least about 7 days prior to the activating.

19 . The composition of claim 18 wherein the mechanical-property-enhancing additives are be present in an amount from about 0.01% to about 5% by weight of the pumice.

20 . The composition of claim 18 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

• C04B28/18

  containing mixtures of the silica-lime type · CPC title

• C09K8/473

  Density reducing additives, e.g. for obtaining foamed cement compositions · CPC title

• C09K2208/08

  Fiber-containing well treatment fluids · CPC title

• C04B2103/12

  Set accelerators · CPC title

• C04B24/28

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