Bacteriacide for killing sulfate reducting bacteria and preparation method of bacteriacide

Abstract

The invention relates to a bacteriacide for killing sulfate reducting bacteria and a preparation method of the bacteriacide and belongs to the technical field of oilfield chemical agents for an oil industry. The bacteriacide for killing the sulfate reducting bacteria is characterized by being composed of, by weight, 22.5%-25.0% of industrial formaldehyde, 2.5%-3.5% of medical metronidazole, 20.0%-25.0% of industrial glutaraldehyde, and the balance water; the medical metronidazole and the water are proportionally added into a 1000L enamel reaction still which is provided with a stirring system, a heating system, a cooling system and a vacuum system, and the enamel reaction still is slowly heated to 70 DEG C-80 DEG C; then, when the medical metronidazole and the water in the enamel reaction still are continuously stirred, the industrial glutaraldehyde is proportionally added into the enamel reaction still and is continuously stirred for 30 minutes, and the heating is stopped; and finally, when the mixture in the enamel reaction still is cooled and stirred simultaneously, and the industrial formaldehyde is proportionally added and then cooled to a normal temperature to obtain the sulfate reducting bacteria bacteriacide. According to the bacteriacide for killing the sulfate reducting bacteria and the preparation method of the bacteriacide, the sulfate reducting bacteria in a sewage injection system of an oilfield can be effectively controlled, the preparation method is simple, sources of raw material are wide, the cost is low, and the economic benefits are good.

Description

Technical field: [0001] The invention relates to a bactericide for killing sulfate-reducing bacteria and a preparation method thereof, which belongs to the technical field of oil field chemical agents in the petroleum industry. Background technique: [0002] Harmful bacteria such as sulfate-reducing bacteria are ubiquitous in oilfield wastewater injection systems. Sulfate-reducing bacteria is a general term for a group of bacteria that reduce sulfate to hydrogen sulfide under anaerobic conditions. Hydrogen sulfide is highly corrosive and toxic, and will cause serious corrosion and other hazards to oilfield sewage water injection systems. [0003] Sulfate-reducing bacteria are the most harmful type of harmful bacteria in oilfield wastewater injection systems. Therefore, it is often necessary to add fungicides to the sewage water injection system to kill sulfate-reducing bacteria to control their hazards. [0004] At present, the main method of controlling sulfate-reducing b...

AI Technical Summary

Problems solved by technology

[0005] Most of the current bactericides are conventional traditional general-purpose bactericides, which do not take into account the anaerobic characteristics of sulfate-reducing bacteria. Therefore, these bactericides either have poor bactericidal effects, are prone to drug resistance, or have poor pertinence, and The consumption is large and the cost is high, which cannot meet the needs of oilfield production