Method for decreasing the concentration of sulfate reducing bacteria in an aqueous system

Patent metadata

Field	Value
Publication number	US-10150944-B2
Application number	US-201615381224-A
Country	US
Kind code	B2
Filing date	Dec 16, 2016
Priority date	Dec 30, 2015
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

The invention relates to a method of decreasing the concentration of sulfide reducing bacteria in an aqueous system, particularly in an aqueous system used in oil-field applications.

First claim

What is claimed is:

1. A method of controlling the growth of a sulfate reducing bacteria in an aqueous system comprising
introducing Brassicibacter mesophilus to the aqueous system at suitable conditions allowing growth of said B. mesophilus in the system, wherein an increase in the growth of Brassicibacter mesophilus inhibits growth of sulfate reducing bacteria of the genus Desulfovibrio in the system.

2. The method of claim 1 wherein the sulfate reducing bacteria is Desulfovibrio vulgaris.

3. The method of claim 1 , which is a batch method, whereby the aqueous system is contacted once with the Brassicibacter mesophilus.

4. The method of claim 1 , which is a continuous method, whereby the Brassicibacter mesophilus is repeatedly introduced into the aqueous system.

5. The method of claim 1 , wherein the aqueous system is contaminated with said sulfate-reducing bacteria after introduction of Brassicibacter mesophilus and wherein the presence of B. mesophilus in the system inhibits the growth of said sulfate reducing bacteria.

6. The method of claim 1 , wherein the aqueous system is a potable aqueous system, wastewater or an industrial aqueous system.

7. A method of controlling the growth of a sulfate reducing bacteria in aqueous systems involved in oil and gas production and transportation comprising
introducing Brassicibacter mesophilus to the aqueous system at suitable conditions allowing growth of said B. mesophilus in the system, wherein an increase in the growth of Brassicibacter mesophilus inhibits growth of sulfate reducing bacteria of the genus Desulfovibrio in the system.

8. The method of claim 7 , wherein said aqueous system into which B. mesophilus is introduced and growing is water that is injected into a subterranean oil-bearing formation during oil recovery.

Assignees

• Dow Global Technologies Llc

Inventors

• Eibergen Nora R

Classifications

• C02F3/34

  characterised by the microorganisms used · CPC title

• C09K8/524

  organic depositions, e.g. paraffins or asphaltenes · CPC title

• C02F2307/14

  Treatment of water in water supply networks, e.g. to prevent bacterial growth · CPC title

• A01N63/00

  Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates (containing compounds of determined constitution A01N27/00 - A01N59/00; unicellular algae A01N65/03) · CPC title

• C02F3/348

  characterised by the way or the form in which the microorganisms are added or dosed · CPC title