Cements for use across formations containing gas hydrates

• US 7,373,982 B2
• Filed: 03/21/2006
• Issued: 05/20/2008
• Est. Priority Date: 03/21/2006
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Fleyfel, Fouad, Brothers, Lance E., Heathman, James F.
• Primary Examiner(s): Gay; Jennifer H.
• Assistant Examiner(s): Leonard; Kerry W.
• Application Number:
  US11/385,416
• Publication Number:
  US 20070221378A1
• Time in Patent Office: 791 Days
• US Class Current: 166/293
• CPC Class Codes: C04B 14/108 Shale, slate colliery shale C04B18/125
• CPC Class Codes: C04B 14/24 porous, e.g. foamed glass
• CPC Class Codes: C04B 18/141 Slags
• CPC Class Codes: C04B 2103/22 Set retarders
• CPC Class Codes: C04B 2103/408 Dispersants
• CPC Class Codes: C04B 2111/76 Use at unusual temperatures, e.g. sub-zero
• CPC Class Codes: C04B 22/143 Calcium-sulfate
• CPC Class Codes: C04B 24/003 Phosphorus-containing compounds
• CPC Class Codes: C04B 24/06 containing hydroxy groups
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 38/10 by using foaming agents C04B38/02 takes precedenceor by using mechanical means, e.g. adding preformed foam
• CPC Class Codes: C09K 8/42 Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells compositions for plastering C09K8/50
• CPC Class Codes: C09K 8/467 containing additives for specific purposes
• CPC Class Codes: C09K 8/52 Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Abstract

A method of servicing a wellbore in a subterranean formation, comprising preparing a cement composition comprising water, a cementitious material, and a gas hydrate inhibitor, and placing the cement composition in the wellbore. A cement composition comprising water, a cementitious material, and a gas hydrate inhibitor.

Claims

1. A method of servicing a wellbore in a subterranean formation, comprising:

(a) preparing a cement composition comprising water, a cementitious material, and a gas hydrate inhibitor; and

(b) placing the cement composition in the wellbore wherein the cement composition comprises cementitious material in an amount of from about 50% to about 80%.

2. The method of claim 1 wherein the gas hydrate inhibitor is lecithin.

3. The method of claim 2 wherein the cement composition comprises lecithin in an amount of from about 0.4% bww to about 1.0% bww.

4. The method of claim 1 wherein the cementitious material comprises Portland cement, pozzolana cements, gypsum cements, phosphate cements, high alumina content cements, silica cements, high alkalinity cements, or combinations thereof.

5. The method of claim 1 wherein the cement composition further comprises a set retarder.

6. The method of claim 1 further comprising foaming the cement composition.

7. The method of claim 1 wherein the cement composition further comprises a density-reducing additive.

8. The method of claim 7 wherein the density-reducing additive comprises glass beads, gas, or combinations thereof.

9. The method of claim 1 wherein the subterranean formation comprises permafrost, gas hydrates, or both.

10. A method of servicing a wellbore in a subterranean formation, comprising:

(a) preparing a cement composition comprising water, a cementitious material, and a gas hydrate inhibitor; and

(b) placing a cement composition in a wellbore wherein the cementitious material comprises blast furnace slag, vitrified shale, calcium sulfate hemi-hydrate or combinations thereof.

11. The method of claim 10 wherein the gas hydrate inhibitor is lecithin.

12. A method of servicing a wellbore in a subterranean formation, comprising:

(a) preparing a cement composition comprising water, a cementitious material, and a gas hydrate inhibitor; and

(b) placing the cement composition in the wellbore wherein the cementitious material comprises blast furnace slag and calcium sulfate hemi-hydrate in a ratio of from about 1;

4 to about 4;

1.

13. The method of claim 12 wherein the gas hydrate inhibitor is lecithin.

14. A method of servicing a wellbore in a subterranean formation, comprising:

(a) preparing a cement composition comprising water, a cementitious material, and a gas hydrate inhibitor; and

(b) placing the cement composition in the wellbore, wherein the cementitious material comprises blast furnace slag in an amount of from about 20% to about 80%.

15. The method of claim 14 wherein the gas hydrate inhibitor is lecithin.

16. A method of servicing a wellbore in a subterranean formation, comprising:

(a) preparing a cement composition comprising water, a cementitious material, and a gas hydrate inhibitor; and

(b) placing the cement composition in the wellbore, wherein the cementitious material comprises vitrified shale in an amount of from about 35% to about 65%.

17. The method of claim 16 wherein the gas hydrate inhibitor is lecithin.

18. A method of servicing a wellbore in a subterranean formation, comprising:

(a) preparing a cement composition comprising water, a cementitious material, and a gas hydrate inhibitor; and

(b) placing the cement composition in the wellbore, wherein the cementitious material comprises calcium sulfate hemi-hydrate in an amount of from about 20% to about 80%.

19. The method of claim 18 wherein the gas hydrate inhibitor is lecithin.

20. A method of servicing a wellbore in a subterranean formation, comprising:

(a) preparing a cement composition comprising water, a cementitious material, and a gas hydrate inhibitor; and

(b) placing the cement composition in the wellbore, wherein the cement composition further comprises a set retarder and wherein the set retarder comprises sodium citrate.

21. The method of claim 20 wherein the gas hydrate inhibitor is lecithin.