Acrylonitrile-based sulfur scavenging agents and methods of use in oilfield operations

Patent metadata

Field	Value
Publication number	US-9896616-B2
Application number	US-201415100917-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Dec 23, 2014
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

Composition for the removal or inactivation of hydrogen sulfide or other species comprising ionizable sulfur (e.g., mercaptans, thiols, etc.) using compositions containing acrylonitrile and/or derivatives thereof are provided. Methods for the removal or inactivation of hydrogen sulfide or other sulfur species in oilfield sites and other related applications using compositions containing acrylonitrile and/or derivatives thereof are provided.

First claim

What is claimed is:

1. A method comprising:
providing a treatment fluid comprising a carrier fluid and an acrylonitrile-based additive;
introducing the treatment fluid into at least a portion of a subterranean formation where one or more sulfur species are present; and
allowing the acrylonitrile-based additive to interact with the sulfur species to reduce the amount of the sulfur species or inactivate at least a portion of the sulfur species present in the formation.

2. The method of claim 1 wherein the carrier fluid comprises an aqueous liquid.

3. The method of claim 1 wherein the treatment fluid has a pH level that is approximately neutral.

4. The method of claim 1 wherein the treatment fluid has a pH level that is at least 5.

5. The method of claim 1 wherein the acrylonitrile-based additive further comprises one or more acrylonitrile derivatives.

6. The method of claim 5 wherein the one or more acrylonitrile derivatives comprises an acrylonitrile derivative containing a side chain with sulfur scavenging functionality.

7. The method of claim 6 wherein the side chain is acrylate.

8. The method of claim 1 wherein the acrylonitrile-based additive is present in the treatment fluid in a concentration of from about 0.5% to about 15% by weight of the treatment fluid.

9. The method of claim 1 , wherein the acrylonitrile-based additive comprises at least one compound selected from the group consisting of compounds having the general formula:

where R is an atom or functional group selected from the group consisting of a hydrogen atom, an alkyl group, an alkene group, an alkyne group, an ester group, an ether group, a carbonyl group, a carbonyl amide group, a urea group, a urethane group, and any combination thereof.

10. The method of claim 1 wherein the acrylonitrile-based additive does not comprise an acrylonitrile polymer or copolymer.

11. A method comprising:
providing a treatment fluid comprising a carrier fluid and an acrylonitrile-based additive;
introducing the treatment fluid into at least a portion of a conduit or container where one or more sulfur species are present; and
allowing the acrylonitrile-based additive to interact with the sulfur species to reduce the amount of the sulfur species or inactivate at least a portion of the sulfur species present in the conduit or container.

12. The method of claim 11 wherein the conduit or container comprises at least a portion of a refining system.

13. The method of claim 11 wherein the conduit or container comprises at least a portion of a pipeline.

14. The method of claim 11 wherein the conduit or container comprises at least a portion of a water or sewage disposal system.

15. The method of claim 11 wherein the acrylonitrile-based additive does not comprise an acrylonitrile polymer or copolymer.

16. A method comprising:
providing a treatment fluid comprising a carrier fluid and an acrylonitrile-based additive that does not comprise an acrylonitrile polymer or copolymer; and
introducing the treatment fluid into at least a portion of a subterranean formation where one or more sulfur species are present.

17. The method of claim 16 further comprising allowing the acrylonitrile-based additive to interact with the sulfur species to reduce the amount of the sulfur species or inactivate at least a portion of the sulfur species present in the formation.

18. The method of claim 16 wherein the treatment fluid has a pH level that is approximately neutral.

19. The method of claim 16 wherein the additive present in the treatment fluid in a concentration of from about 0.5% to about 15% by weight of the fluid.

20. The method of claim 16 , wherein the additive comprises at least one acrylonitrile-based compound selected from the group consisting of compounds having the general formula:

where R is an atom or functional group selected from the group consisting of a hydrogen atom, an alkyl group, an alkene group, an alkyne groups, an ester group, an ether group, a carbonyl group, a carbonyl amide group, a urea group, a urethane group, and any combination thereof.

Assignees

• Multi Chem Group Llc

Inventors

• Shi Liu
• Zhao Funian
• Qu Liangwei
• Harless Michael
• Hoppe Ron

Classifications

• C09K8/532 Primary

  Sulfur · CPC title

• C09K2208/20

  Hydrogen sulfide elimination · CPC title

• C09K8/54

  Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title

• C09K8/52 Primary

  Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning · CPC title

• E21B37/06

  using chemical means for preventing or limiting {, e.g. eliminating,} the deposition of paraffins or like substances · CPC title