Microbial metabolism of chlorine oxyanions as a control of biogenic hydrogen sulfide production

Patent metadata

Field	Value
Publication number	US-2016369156-A1
Application number	US-201615160680-A
Country	US
Kind code	A1
Filing date	May 20, 2016
Priority date	Jun 3, 2011
Publication date	Dec 22, 2016
Grant date	—

Abstract

The present disclosure relates to methods of controlling the sulfide (S 2− ) content in systems, such as oil and gas reservoirs and pipelines, by the use of chlorine oxyanions and microorganisms with (per)chlorate-reducing activity.

First claim

1 - 62 . (canceled)

63 . A method of decreasing one or more sulfide-containing compounds in an oil reservoir, the method comprising:
injecting perchlorate to an oil reservoir comprising sulfate-reducing bacteria,
wherein the concentration of injected perchlorate is sufficient to decrease sulfate-reducing activity of said sulfate-reducing bacteria, thereby decreasing one or more sulfide-containing compounds in said oil reservoir.

64 . The method of claim 63 , wherein the oil reservoir comprises sulfate, and wherein the perchlorate is at a concentration that is at least 50% of the concentration of sulfate present in the oil reservoir.

65 . The method of claim 63 , wherein the system comprises sulfate, and wherein the perchlorate is at a concentration that is between 50% and 100% of the concentration of sulfate present in the oil reservoir.

66 . The method of claim 63 , wherein the method further comprises injecting nitrite.

67 . The method of claim 66 , wherein the nitrite is injected at a concentration sufficient to inhibit the sulfate-reducing bacteria.

68 . The method of claim 66 , wherein the nitrite is added in an amount sufficient to yield a perchlorate to nitrite ratio of 100:1.

69 . The method of claim 63 , wherein the method further comprises injecting sulfate-reducing bacteria with seawater, sediment, or water rich in decaying organic material.

70 . The method of claim 63 , wherein said one or more sulfide-containing compounds is hydrogen sulfide (H 2 S).

71 . A method of decreasing one or more sulfide-containing compounds in a gas reservoir, the method comprising injecting perchlorate to a gas reservoir comprising sulfate-reducing bacteria, wherein the concentration of perchlorate is sufficient to decrease sulfate-reducing activity of said sulfate-reducing bacteria, thereby decreasing one or more sulfide-containing compounds in said gas reservoir.

72 . The method of claim 71 , wherein the gas reservoir comprises sulfate, and wherein the perchlorate is at a concentration that is at least 50% of the concentration of sulfate present in the gas reservoir.

73 . The method of claim 71 , wherein the system comprises sulfate, and wherein the perchlorate is at a concentration that is between 50% and 100% of the concentration of sulfate present in the gas reservoir.

74 . The method of claim 71 , wherein the method further comprises injecting nitrite.

75 . The method of claim 74 wherein the nitrite is injected at a concentration sufficient to inhibit the sulfate-reducing bacteria.

76 . The method of claim 74 , wherein the nitrite is injected in an amount sufficient to yield a perchlorate to nitrite ratio of 100:1.

77 . The method of claim 74 , wherein the method further comprises injecting sulfate-reducing bacteria with seawater, sediment, or water rich in decaying organic material.

78 . The method of claim 74 , wherein said one or more sulfide-containing compounds is hydrogen sulfide (H 2 S).

Assignees

• Univ California

Inventors

• Coates John D

Classifications

• C12N9/99

  Enzyme inactivation by chemical treatment · CPC title

• C12N1/00

  Microorganisms; Compositions thereof (medicinal preparations containing material from protozoa, bacteria or viruses A61K35/66, from algae A61K36/02, from fungi A61K36/06; preparing medicinal bacterial antigen or antibody compositions, e.g. bacterial vaccines, A61K39/00); Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor · CPC title

• C07K14/195 Primary

  from bacteria · CPC title

• C09K8/532 Primary

  Sulfur · CPC title

• C09K2208/20

  Hydrogen sulfide elimination · CPC title