Compositions of heterocyclic compounds and uses as sulfidogenesis inhibitors
The present disclosure generally relates to compositions and uses of sulfidogenesis inhibitor compounds of Formulae 1 and 2 for preventing sulfidogenesis, i.e., the reduction reaction of a sulfur-containing compound by sulfur-utilizing prokaryotes that produce sulfide species such as hydrogen sulfide, during enhanced oil recovery processes. A method for inhibiting or decreasing microbial sulfide production by sulfur-utilizing prokaryotes includes addition of an effective amount of sulfidogenesis inhibitor compounds of Formulae 1 and 2 to the fluid that is injected into a sulfidogenic reservoir system during enhanced oil recovery. For example, the compounds can be used as sulfidogenesis inhibitors in a water injection system for use in a hydrocarbon extraction system or a hydrocarbon production system. Thus, these compositions can be effectively used as inhibitors of biogenic hydrogen sulfide generation in oilfield fluids.
1. A method of sulfidogenesis inhibition in a hydrocarbon-containing system comprising a water injection system, a hydrocarbon extraction system, or a hydrocarbon production system, the method comprising administering an effective amount of a sulfidogenesis inhibitor compound of Formula 1 into the water injection system, the hydrocarbon extraction system, or the hydrocarbon production system, the compound of Formula 1 having a structure corresponding to:
wherein
A is a nitrogen-containing heterocycle of 1,3-oxazetidine, 1,3-diazetidine, 1,3-thiazetidine, oxazolidine, imidazolidine, thiazolidine, 1,3-oxazinane, hexahydropyrimidine, 1,3-thiazinane, 1,3-oxazepane, 1,3-diazepane, 1,3-thiazepane, 1,3-oxazocane, 1,3-diazocane, 1,3-thiazocane;
R 1 , R 2 , R 4 , and R 5 are independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted alkoxy, or substituted or unsubstituted alkaryl;
R 3 is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted alkaryl; and
n is an integer from 1 to 10.
2. The method of claim 1 , wherein the sulfidogenesis inhibitor compound of formula 1 inhibits the production of hydrogen sulfide by a sulfur-utilizing prokaryote.
3. The method of claim 2 , wherein the sulfur-utilizing prokaryote produces sulfide through reduction of sulfate, thiosulfate, sulfur, bisulfite, an organosulfur compound, or a combination thereof.
4. The method of claim 1 , wherein the sulfidogenesis inhibitor compound of Formula 1 is administered by contacting the compound of Formula 1 with water in the water injection system or the sulfidogenesis inhibitor compound of Formula 1 is administered by injecting an injection fluid into the hydrocarbon extraction system or the hydrocarbon production system.
5. The method of claim 1 , wherein the hydrocarbon extraction system or the hydrocarbon production system is a subterranean hydrocarbon-containing formation.
6. The method of claim 1 , wherein the sulfidogenesis inhibitor compound of Formula 1 has a structure corresponding to Formula 2
wherein
R 1 , R 2 , R 4 , and R 5 are independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted alkoxy, or substituted or unsubstituted alkaryl.
7. The method of claim 6 , wherein R 2 and R 4 are hydrogen and R 1 and R 5 are independently hydrogen, substituted or unsubstituted C 1 to C 6 alkyl, or substituted or unsubstituted phenyl.
8. The method of claim 6 , wherein R 2 and R 4 are hydrogen and R 1 and R 5 are independently hydrogen, unsubstituted C 1 to C 6 alkyl, or unsubstituted phenyl.
9. The method of claim 6 , wherein R 2 and R 4 are hydrogen and R 1 and R 5 are independently hydrogen, methyl, ethyl, propyl, butyl, phenyl, or benzyl.
10. The method of claim 9 , wherein the effective amount of the sulfidogenesis inhibitor compound of Formula 2 is from about 1 to about 500 ppm based on the total amount of injection fluid injected into the formation or production system.
11. The method of claim 10 , wherein the effective amount of the sulfidogenesis inhibitor compound of Formula 2 is from about 1 to about 250 ppm based on the total amount of injection fluid injected into the formation or production system.
12. The method of claim 10 , wherein the effective amount of the sulfidogenesis inhibitor compound of Formula 2 is from about 1 to about 100 ppm based on the total amount of injection fluid injected into the formation or production system.
13. The method of claim 1 , wherein the sulfidogenesis inhibitor compound of Formula 1 is injected into the water injection system, the hydrocarbon extraction system, or the hydrocarbon production system continuously with the injection fluid.
14. The method of claim 1 , wherein the sulfidogenesis inhibitor compound of Formula 1 is injected into the water injection system, the hydrocarbon extraction system, or the hydrocarbon production system intermittently with the injection fluid.
15. The method of claim 14 , wherein the injection of the sulfidogenesis inhibitor compound of Formula 1 is intermittently injected every one to three hours.
16. The method of claim 14 , wherein the injection of the sulfidogenesis inhibitor compound of Formula 1 is intermittently injected every one to three days.
17. The method of claim 14 , wherein the injection of the sulfidogenesis inhibitor compound of Formula 1 is intermittently injected every one to three weeks.
18. The method of claim 16 , further comprising administering an organic solvent, a corrosion inhibitor, an asphaltene inhibitor, a paraffin inhibitor, a scale inhibitor, an emulsifier, a water clarifier, a dispersant, an emulsion breaker, a gas hydrate inhibitor, a biocide, a pH modifier, a surfactant, or a combination thereof.