Plugging and abandoning a well using extended-life cement compositions

Patent metadata

Field	Value
Publication number	US-10655047-B2
Application number	US-201515579590-A
Country	US
Kind code	B2
Filing date	Jul 7, 2015
Priority date	Jul 7, 2015
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

Methods and systems for plug-and-abandon applications are included. A method comprises providing an extended-life cement composition comprising calcium aluminate cement, water, and a cement set retarder. The method further comprises mixing the extended-life cement composition with a cement set activator to activate the extended-life cement composition, introducing the activated extended-life cement composition into a wellbore, and allowing the activated extended-life cement composition to set in the wellbore to form a plug in the wellbore. The plug has a permeability of less than 0.1 millidarcy.

First claim

What is claimed is:

1. A method of cementing comprising:
providing an extended-life cement composition comprising calcium aluminate cement, water, and a cement set retarder, wherein the cement set retarder is present in an amount of about 0.01% to about 10% by weight of the extended-life cement composition;
storing the extended-life cement composition in a vessel for a time period of at least about 7 days or longer,
mixing the extended-life cement composition with a cement set activator to activate the extended-life cement composition;
introducing the activated extended-life cement composition into a wellbore; and
allowing the activated extended-life cement composition to set in the wellbore to form a plug in the wellbore that has a permeability of less than 0.1 millidarcy, the composition having a 7-day compressive strength of 4,000 psi or greater.

2. The method of claim 1 , wherein the cement set retarder is selected from the group consisting of hydroxycarboxylic acids or their respective salts, boric acid or its respective salt, and any combination thereof.

3. The method of claim 1 , wherein the composition further comprises a polyphosphate.

4. The method of claim 3 , wherein the polyphosphate is sodium hexametaphosphate.

5. The method of claim 3 , wherein the polyphosphate is present in an amount of about 1% to about 30% by weight of the extended-life cement composition.

6. The method of claim 1 , wherein the cement set activator is selected from the group consisting of Groups IA and IIA hydroxides, alkaline aluminates, Portland cement, and any combination thereof; wherein the cement set activator is present in an amount of about 0.01% to about 10% by weight of the extended-life cement composition.

7. The method of claim 1 , wherein the extended-life cement composition further comprises at least one lithium salt selected from the group consisting of lithium sulfate, lithium carbonate, and any combination thereof.

8. The method of claim 1 , wherein the subterranean formation adjacent to the plug has a temperature of about 100° F. or less.

9. The method of claim 1 , wherein the extended-life cement composition further comprises sodium hexametaphosphate; and wherein the sodium hexametaphosphate is present in an amount of about 1% to about 30% by weight of the extended-life cement composition.

10. The method of claim 1 , wherein the composition has a thickening time from about 2 hours to at least about 190 hours or more.

Assignees

• Halliburton Energy Services Inc

Inventors

• Agapiou Kyriacos
• Pisklak Thomas Jason
• Lewis Samuel J

Classifications

• C04B22/0093

  Aluminates · CPC title

• C09K8/467 Primary

  containing additives for specific purposes · CPC title

• C04B22/062

  of the alkali or alkaline-earth metals · CPC title

• C04B2103/0008

  Li · CPC title

• C04B28/06

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