Method for biologically inhibiting production of secondary hydrogen sulfide from sulfate reducing bacteria in crude oil gathering and transporting system

Abstract

The invention relates to a method for biologically inhibiting the production of secondary hydrogen sulfide from sulfate reducing bacteria in a crude oil gathering and transporting system. In the method, (1) a biological inhibitor for inhibiting a single well consists of 50 mg / L sodium nitrite and 20 mg / L sodium borate; (2) the biological inhibitor for inhibiting an oil transfer station consists of 40 to 60 mg / L sodium nitrite, 25 milligrams of humic acid, 10 to 20 mg / L sodium borate and 20 to 30 mg / L sodium hydroxide electrolyte; and (3) the biological inhibitor for inhibiting a combined station consists of 40 to 60 mg / L sodium nitrite, 25 milligrams of humic acid, 10 to 20 mg / L sodium borate, 20 to 30 mg / L sodium hydroxide electrolyte and 95 mg / L glutaraldehyde bactericide. In the method, the generation of the hydrogen sulfide is controlled at the source, and the method has the characteristics of long hydrogen sulfide inhibition time, low cost and no secondary pollutions and improvesthe working environment of a workplace of the crude oil gathering and transporting system.

Description

technical field [0001] The invention relates to a biological inhibition technology for treating secondary hydrogen sulfide in a crude oil gathering and transportation system, which is suitable for suppressing secondary hydrogen sulfide produced by sulfate-reducing bacteria biological metabolism in units of crude oil gathering and transportation systems such as single wells, oil transfer stations, and combined stations. , which belongs to the field of toxic and harmful gas treatment in oil and gas fields. Background technique [0002] As far as the petroleum industry is concerned, H 2 The distribution of S gas is very wide, which is extremely harmful to the life safety and personal health of employees. When the concentration of hydrogen sulfide is high (50-200ppm), the oxygen in the blood will be taken away, and the human body organs will be poisoned due to lack of oxygen; when the concentration is extremely high (700-2000ppm), it will only take a few seconds for the human b...

AI Technical Summary

Problems solved by technology

[0006] At present, there are two main types of treatment technologies for the generation of hydrogen sulfide by sulfate-reducing bacteria in the gathering system. One is to kill sulfate-reducing bacteria in the system by adding chemical fungicides to the gathering system. However, long-term use is likely to cause environmental damage. Pollution and human injury, and the long-term use of fungicides will cause the sulfate-reducing bacteria in the system to develop drug resistance, and the sterilization efficiency will decrease with the increase of filling time; the other is passive treatment, that is, for the produced The hydrogen sulfide is processed through physical, chemical, microbial and other methods, such as activated carbon adsorption hydrogen sulfide technology, alcohol amine method absorption hydrogen sulfide technology, biological trickling tower adsorption hydrogen sulfide technology, hydrogen sulfide generated in the collection system and then combusted, etc.

The above two types of technologies are all hydrogen sulfide gas control technologies, which cannot fundamentally solve the generation of hydrogen sulfide, and will generate pollutants during use, causing secondary pollution, and are not advocated now.

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