Methods of measuring hydrogen sulfide concentrations in reservoir fluids

Patent metadata

Field	Value
Publication number	US-10451604-B2
Application number	US-201615555876-A
Country	US
Kind code	B2
Filing date	Mar 4, 2016
Priority date	Mar 6, 2015
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

A chemical probe composition comprising a base fluid and a chemical probe, wherein the chemical probe is capable of reacting with hydrogen sulfide to form a fluorophore and associated methods and systems.

First claim

That which is claimed is:

1. A chemical probe composition comprising a base fluid and a chemical probe, wherein the chemical probe is configured to react with hydrogen sulfide in a reservoir fluid to form a fluorophore, wherein the chemical probe is selected from the group consisting of disulfide ester chemical probes, enone ester chemical probes, aldehvde-enoate chemical probes, aldehyde enone chemical probes, aryl azide chemical probes, aryl sulfonyl azide chemical probes, 4-nitro naphthalimide derivate chemical probes, 5-hydroxyamlno napthlhalimide chemical probes, azamacrocylic copper (II) ion complex chemical probes and combinations thereof.

2. The chemical probe composition of claim 1 , wherein the base fluid comprises an aromatic solvent.

3. The chemical probe composition of claim 1 , wherein the chemical probe is capable of reacting with hydrogen sulfide to form a fluorophore by a nucleophilic cyclization reaction.

4. The chemical probe composition of claim 3 , wherein the nucleophilic cyclization reaction is a disulfide cleavage reaction of the chemical probe.

5. The chemical probe composition of claim 3 , wherein the nucleophilic cyclization reaction is an addition-cyclization reaction of the chemical probe.

6. The chemical probe composition of claim 3 , wherein the nucleophilic cyclization reaction is a Michael addition & aldol condensation reaction.

7. The chemical probe composition of claim 1 , wherein the chemical probe is capable of reacting with hydrogen sulfide to form a fluorophore by a chemical reduction reaction.

8. The chemical probe composition of claim 7 , wherein the chemical reduction reaction is a N 3 group reduction reaction.

9. The chemical probe composition of claim 7 , wherein the chemical reduction reaction is an NO 2 group reduction reaction.

10. The chemical probe composition of claim 7 , wherein the chemical reduction reaction is an HNOH group reduction reaction.

11. The chemical probe composition of claim 1 , wherein the chemical probe is capable of reacting with hydrogen sulfide to form a fluorophore by a metal sulfide formation reaction.

12. The chemical probe composition of claim 1 , wherein the chemical probe is present in the chemical probe composition in an amount in the range of from 0.1 mol % to 5 mol %.

13. The chemical probe composition of claim 1 , wherein the base fluid is present in the chemical probe composition in an amount in the range of from 95 mol % to 99.9 mol %.

14. A method comprising: providing a chemical probe composition comprising a base fluid and a chemical probe, wherein the chemical probe reacts with hydrogen sulfide in a reservoir fluid to form a fluorophore, wherein the chemical probe is selected from the group consisting of disulfide ester chemical probes, enone ester chemical probes, aldehvde-enoate chemical probes, aldehyde enone chemical probes, aryl azide chemical probes, aryl sulfonyl azide chemical probes, 4-nitro naphthalimide derivate chemical probes, 5-hydroxyamlno napthlhalimide chemical probes, azamacrocylic copper (II) ion complex chemical probes and combinations thereof, and introducing the chemical probe composition into a subterranean formation.

15. The method of claim 14 , wherein the chemical probe composition comprises the chemical probe composition of any one of claims 2 - 13 .

16. The method of claim 14 , wherein introducing the chemical probe composition into the subterranean formation comprises placing the chemical probe composition into a sample container and lowering the sample container into a wellbore penetrating the subterranean formation.

17. The method of claim 16 , further comprising allowing a portion of the reservoir fluid to enter into sample container.

18. The method of claim 14 , further comprising allowing the chemical probe to react with hydrogen sulfide to form a fluorophore.

19. The method of claim 18 , further comprising measuring the concentration of the fluorophore.

20. A hydrogen sulfide measuring system comprising:
a sampling device comprising a chemical probe composition comprising a base fluid and a chemical probe, wherein the chemical probe is configured to react with hydrogen sulfide in a reservoir fluid to form a fluorophore, wherein the chemical probe is selected from the group consisting of disulfide ester chemical probes, enone ester chemical probes, aldehvde-enoate chemical probes, aldehyde enone chemical probes, aryl azide chemical probes, aryl sulfonyl azide chemical probes, 4-nitro naphthalimide derivate chemical probes, 5-hydroxyamlno napthlhalimide chemical probes, azamacrocylic copper (II) ion complex chemical probes and combinations thereof, and a subterranean formation penetrated by a well bore, wherein the sampling device is located in the well bore.

Assignees

• Shell Oil Co

Inventors

• Ashtekar Sunil
• Pollard Richard

Classifications

• G01N31/22

  using chemical indicators (G01N31/02 takes precedence) · CPC title

• G01N21/643

  non-biological material · CPC title

• E21B49/082

  Wire-line fluid samplers (E21B49/083 takes precedence) · CPC title

• G01N33/287 Primary

  Sulfur content · CPC title

• E21B2049/085

  Fixed Constructions · mapped topic