Combined Set-Delayed Cement Compositions

Patent metadata

Field	Value
Publication number	US-2017306213-A1
Application number	US-201415500428-A
Country	US
Kind code	A1
Filing date	Sep 30, 2014
Priority date	Sep 30, 2014
Publication date	Oct 26, 2017
Grant date	—

Abstract

Methods of using the set-delayed cement slurries and compositions resulting from the combination of the set-delayed cement slurries are also described. A method may comprise providing a first set-delayed cement slurry comprising a pozzolanic cement and/or a Portland cement, water, and a first cement set retarder; providing a second set-delayed cement slurry comprising calcium-aluminate and a second cement set retarder; mixing the first slurry and the second slurry to form a cement composition; and allowing the cement composition to set.

First claim

What is claimed is:

1 . A method of cementing comprising:
providing a first set-delayed cement slurry comprising a pozzolanic cement and/or a Portland cement, water, and a first cement set retarder; providing a second set-delayed cement slurry comprising calcium-aluminate and a second cement set retarder; mixing the first slurry and the second slurry to form a cement composition; and allowing the cement composition to set.

2 . A method according to claim 1 wherein the cement composition is introduced into a wellbore penetrating a subterranean formation and allowed to set within.

3 . A method according to claim 1 , wherein the first set-delayed cement slurry comprises the pozzolanic cement and wherein the pozzolanic cement is selected from the group consisting of fly ash, silica fume, metakaolin, pumice, and any combination thereof.

4 . A method according to claim 1 , wherein the first set-delayed cement slurry comprises the pozzolanic cement and lime.

5 . A method according to claim 1 , wherein the cement composition further comprises at least one dispersant selected from the group consisting of a sulfonated-formaldehyde-based dispersant, a polycarboxylated ether dispersant, and any combination thereof.

6 . A method according to claim 1 , wherein at least one of the first cement set retarder or the second cement set retarder is 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 combination thereof.

7 . A method according to claim 1 , further comprising storing at least one of the first set-delayed cement slurry or the second set-delayed cement slurry for a time period of about 1 days or longer prior to the step of mixing.

8 . A method according to claim 1 , further comprising storing at least one of the first set-delayed cement slurry or the second set-delayed cement slurry for a time period of about 7 days or longer prior to the step of mixing.

9 . A method according to claim 1 , wherein at least one of the first set-delayed cement slurry or the second set-delayed cement slurry comprises a lithium salt.

10 . A method according to claim 1 , further comprising pumping the cement composition through a feed pipe and into a wellbore annulus that is penetrating a subterranean formation.

11 . A method according to claim 1 , further comprising introducing at least a portion of the first set-delayed cement slurry into a wellbore that penetrates a subterranean formation such that the first set-delayed cement slurry displaces at least one fluid from the wellbore.

12 . A cement composition comprising:
a pozzolanic cement and/or a Portland cement, a calcium-aluminate cement, water, a first cement set retarder, and a second cement set retarder.

13 . A cement composition according to claim 12 , wherein the cement composition comprises the pozzolanic cement and wherein the pozzolanic cement is selected from the group consisting of fly ash, silica fume, metakaolin, pumice, and any combination thereof.

14 . A cement composition according to claim 12 , wherein the cement composition further comprises a dispersant.

15 . A cement composition according to claim 14 , 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.

16 . A cement composition according to claim 12 , wherein at least one of the first cement set retarder or the second cement set retarder is 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 combination thereof.

17 . A cement composition according to claim 12 , wherein the cement composition further comprises a lithium salt.

18 . A system for cementing comprising:
a first set-delayed cement slurry comprising a pozzolanic cement and/or a Portland cement, water, and a first cement set retarder; a second set-delayed cement slurry comprising calcium-aluminate and a second cement set retarder; a first vessel capable of containing the first slurry, wherein the first vessel also comprises a first pump capable of pumping the first slurry; a second vessel capable of containing the second slurry, wherein the second vessel also comprises a second pump capable of pumping the second slurry; a line connected to the first pump and the second pump, wherein the line is capable of mixing the first set-delayed cement slurry and the second set-delayed cement slurry; and a third pump connected to the line capable of delivering the first set-delayed cement slurry and the second set-delayed cement slurry into a wellbore.

19 . A system according to claim 18 , wherein at least one of the first cement set retarder or the second cement set retarder is 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 combination thereof.

20 . A system according to claim 18 , wherein at least one of the first set-delayed cement slurry or the second set-delayed cement slurry comprises a lithium salt.

Assignees

• Halliburton Energy Services Inc

Inventors

• Morgan Ronnie Glen
• Agapiou Kyriacos
• Pisklak Thomas Jason

Classifications

• C04B2103/408

  Dispersants · CPC title

• E21B33/14

  for cementing casings into boreholes · CPC title

• C04B28/18

  containing mixtures of the silica-lime type · CPC title

• C09K8/467

  containing additives for specific purposes · CPC title

• C04B28/06

  Aluminous cements (monolithic refractories or refractory mortars C04B35/66) · CPC title