Settable cement compositions for terminating water flow and associated methods

Patent metadata

Field	Value
Publication number	US-2017247294-A1
Application number	US-201415505268-A
Country	US
Kind code	A1
Filing date	Oct 16, 2014
Priority date	Oct 16, 2014
Publication date	Aug 31, 2017
Grant date	—

Abstract

Compositions and methods for terminating water flow in a subterranean formation are described. The compositions include a calcium aluminate cement, a Portland cement, and a non-aqueous carrier fluid.

First claim

What is claimed is:

1 . A settable cement composition comprising:
a calcium aluminate cement; a Portland cement; and a non-aqueous carrier fluid.

2 . The settable cement composition of claim 1 , wherein the calcium aluminate cement is present in the range of about 25 to 75 percent by weight of the composition, the Portland cement is present in the range of about 0.1 to 10 percent by weight of the composition, the non-aqueous carrier fluid is present in the range of about 25 to 75 percent by weight of the composition, or any combination thereof.

3 . The settable cement composition of claim 1 , wherein the non-aqueous carrier fluid comprises a hydrocarbon fluid.

4 . The settable cement composition of claim 3 , wherein the hydrocarbon fluid comprises diesel oil.

5 . The settable cement composition of claim 1 , further comprising a polyphosphate.

6 . The settable cement composition of claim 5 , wherein the polyphosphate is selected from the group consisting of sodium hexametaphosphate, tripolyphosphate, orthophosphate, sodium hydrogen phosphate, and sodium dihydrogen phosphate.

7 . The settable cement composition of claim 5 , wherein the polyphosphate is present in the range of about 1 to 20 percent by weight of the composition.

8 . The settable cement composition of claim 1 , further comprising a surfactant.

9 . The settable cement composition of claim 8 , wherein the surfactant is present in the range of about 0.01 to 5 percent by weight of the composition.

10 . A cured cement composition having a compressive strength greater than about 200 psi comprising the settable cement composition of claim 1 , after curing at ambient temperature and pressure for about 30 minutes.

11 . A cured cement composition having a compressive strength greater than about 2000 psi comprising the settable cement composition of claim 1 , after curing at ambient temperature and pressure for about 24 hours.

12 . A settable cement composition comprising:
a calcium aluminate cement; sodium hexametaphosphate; a Portland cement; and diesel oil.

13 . The settable cement composition of claim 12 , wherein the calcium aluminate cement is present in the range of about 25 to 75 percent by weight of the composition, the sodium hexametaphosphate is present in the range of about 1 to 20 percent by weight of the composition, the Portland cement is present in the range of about 0.1 to 10 percent by weight of the composition, the diesel oil is present in the range of about 25 to 75 percent by weight of the composition, or any combination thereof.

14 . The settable cement composition of claim 12 , further comprising a surfactant.

15 . A method of terminating water flow in a subterranean formation comprising:
preparing a cement composition comprising a calcium aluminate cement, a polyphosphate, a Portland cement, and a non-aqueous carrier fluid; introducing the cement composition into the subterranean formation; and contacting the cement composition with an aqueous fluid to initiate an immediate gelation of the cement composition.

16 . The method of claim 15 , wherein the calcium aluminate cement is present in the range of about 25 to 75 percent by weight of the composition, the Portland cement is present in the range of about 0.1 to 10 percent by weight of the composition, the non-aqueous carrier fluid is present in the range of about 25 to 75 percent by weight of the composition, or any combination thereof.

17 . The method of claim 15 , wherein the cement composition further comprises a polyphosphate, a surfactant, or both.

18 . The method of claim 17 , wherein the polyphosphate is present in the range of about 1 to 20 percent by weight of the composition, the surfactant is present in the range of about 0.01 to 5 percent by weight of the composition, or both.

19 . The method of claim 15 , further comprising curing the cement composition at ambient temperature and pressure for about 30 minutes to provide a cured cement composition having a compressive strength greater than about 200 psi.

20 . The method of claim 15 , further comprising curing the cement composition at ambient temperature and pressure for about 24 hours to provide a cured cement composition having a compressive strength greater than about 2000 psi.

Assignees

• Halliburton Energy Services Inc

Inventors

• Agapiou Kyriacos
• Pisklak Thomas J
• Eoff Larry

Classifications

• C09K8/467

  containing additives for specific purposes · CPC title

• E21B33/14

  for cementing casings into boreholes · CPC title

• C04B2103/40

  Surface-active agents, dispersants · CPC title

• C04B28/06 Primary

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

• C04B22/16

  containing phosphorus in the anion, e.g. phosphates · CPC title