Self-healing cement comprising polymer capable of swelling in gaseous environment

Patent metadata

Field	Value
Publication number	US-10125302-B2
Application number	US-201415506217-A
Country	US
Kind code	B2
Filing date	Sep 29, 2014
Priority date	Sep 29, 2014
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A method of treating a subterranean formation includes introducing cement composition into a wellbore, the cement composition including a pumpable slurry of cement comprising a copolymer capable of swelling in a gaseous environment. A composition includes a pumpable slurry of cement comprising a copolymer capable of swelling in a gaseous environment.

First claim

What is claimed is:

1. A method comprising:
introducing a well cementing composition into a wellbore, the well cementing composition comprising:
a pumpable slurry of cement comprising a copolymer capable of swelling on contact with at least one gas selected from the group consisting of hydrogen sulfide gas, hydrogen chloride gas, carbon dioxide gas, and combinations thereof, wherein the copolymer does not include a fluoro-based monomer,

curing at least a portion of the well cementing composition to form a cured cement;
contacting the copolymer with the hydrogen sulfide gas, the hydrogen chloride gas, the carbon dioxide gas, or combinations thereof; and
swelling the copolymer due to contact with the gas.

2. The method of claim 1 , wherein the copolymer comprises at least two of the following monomers: alkyl acrylates, alkyl methacrylates, cyclohexyl acrylates, cyclohexyl methacrylates, aryl acrylates, aryl methacrylates, aminoalkyl acrylates, aminoalkyl methacrylates, alkyl vinyl ethers, styrene, acrylonitrile, 2-vinyl pyridine, 4-vinyl pyridine, vinyl acetate, alkane diol diacrylates, alkane diol dimethacrylates, alkene glycol diacrylates, alkene glycol dimethacrylates, alkane diol divinyl ethers, alkene glycol divinylethers, divinylbenzene, allyl methacrylate, allyl acrylatestyrene, DMAEMA, EGDMA, methyl methacrylate (MMA), polypropylene, tri vinyl monomers, and combinations thereof.

3. The method of claim 1 , wherein the copolymer comprises styrene monomer in the amount of about 5% to about 25% by weight.

4. The method of claim 1 , wherein the copolymer comprises DMAEMA in the amount of about 75% to about 95% by weight.

5. The method of claim 1 , wherein the copolymer comprises EGDMA in the amount of about 1% to about 3% by weight.

6. The method of claim 1 , further comprising allowing the cured cement to self-heal to compensate for changes or faults in a physical structure of the cured cement.

7. The method of claim 6 , wherein the self-healing comprises the swelling of the copolymer on contact with at least one gas selected from the group consisting of hydrogen sulfide gas, hydrogen chloride gas, carbon dioxide gas, and combinations thereof, thereby blocking migration of fluids, gases, and combinations thereof.

8. The method of claim 6 , wherein the changes or faults are cracks due to physical stresses, chemical attack, formation creep, and combinations thereof.

9. A cementing system comprising:
an apparatus configured to:
place a cement composition in a wellbore, said cement composition comprising:
a pumpable slurry of cement comprising a copolymer capable of swelling due to contact with at least one gas selected from the group consisting of hydrogen sulfide gas, hydrogen chloride gas, carbon dioxide, and combinations thereof, wherein the copolymer does not include a fluoro-based monomer, wherein the gaseous environment comprises at least one of CO 2 , H 2 S, HCl gas, and combinations thereof,

wherein the cement composition is capable of curing to form a cured cement, and wherein the cured cement is capable of adapting to compensate for changes or faults in a physical structure of the cured cement.

10. The system of claim 9 , wherein the cured cement adapts by self-healing.

11. The system of claim 10 , wherein the self-healing comprises swelling the copolymer on contact with at least one gas selected from the group consisting of hydrogen sulfide gas, hydrogen chloride gas, carbon dioxide gas, and combinations thereof, thereby blocking migration of fluids, gases, and combinations thereof.

12. The system of claim 9 , wherein the changes or faults are cracks due to physical stresses, chemical attack, formation creep, and combinations thereof.

13. The system of claim 9 , wherein the copolymer comprises at least two of the following monomers: alkyl acrylates, alkyl methacrylates, cyclohexyl acrylates, cyclohexyl methacrylates, aryl acrylates, aryl methacrylates, aminoalkyl acrylates, aminoalkyl methacrylates, alkyl vinyl ethers, styrene, acrylonitrile, 2-vinyl pyridine, 4-vinyl pyridine, vinyl acetate, alkane diol diacrylates, alkane diol dimethacrylates, alkene glycol diacrylates, alkene glycol dimethacrylates, alkane diol divinyl ethers, alkene glycol divinylethers, divinylbenzene, allyl methacrylate, allyl acrylate, styrene, DMAEMA, EGDMA, methyl methacrylate (MMA), polypropylene, tri vinyl monomers, and combinations thereof.

14. A composition for well cementing comprising:
a pumpable slurry of cement comprising a copolymer capable of swelling due to contact with at least one gas selected from the group consisting of hydrogen sulfide gas, hydrogen chloride gas, carbon dioxide, and combinations thereof, wherein the copolymer does not include a fluoro-based polymer.

15. The composition of claim 14 , wherein the copolymer comprises at least two of the following monomers: alkyl acrylates, alkyl methacrylates, cyclohexyl acrylates, cyclohexyl methacrylates, aryl acrylates, aryl methacrylates, aminoalkyl acrylates, aminoalkyl methacrylates, alkyl vinyl ethers, styrene, acrylonitrile, 2-vinyl pyridine, 4-vinyl pyridine, vinyl acetate, alkane diol diacrylates, alkane diol dimethacrylates, alkene glycol diacrylates, alkene glycol dimethacrylates, alkane diol divinyl ethers, alkene glycol divinylethers, divinylbenzene, allyl methacrylate, allyl acrylatestyrene, DMAEMA, EGDMA, methyl methacrylate (MMA), polypropylene, tri vinyl monomers, and combinations thereof.

16. The composition of claim 14 , wherein the copolymer comprises styrene in the amount of about 5% to about 25% by weight.

17. The composition of claim 14 , wherein the copolymer comprises DMAEMA in the amount of about 75% to about 95% by weight.

Assignees

• Halliburton Energy Services Inc

Inventors

• Mishra Vaishali
• Kadam Sunita Sameer
• Patil Rahul Chandrakant

Classifications

• C09K8/473 Primary

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

• E21B33/14

  for cementing casings into boreholes · CPC title

• C04B28/02 Primary

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B26/06

  Acrylates · CPC title

• C09K8/42

  Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells (compositions for plastering C09K8/50) · CPC title