Inhibitor for preventing sulfate reducing bacteria corrosion

Abstract

Disclosed is an inhibitor applied in oil well for preventing against corrosion from sulfate reducing bacteria, which is characterized by comprising the following components: a. 0.05% by weight of aqueous solution of peptide coupling reagent (HOOBt) C7H5N3O2; b. 2.0-5.0% by weight of magnesium sulphate(MgSO4*7H2O); c. 1.5-4.5% by weight of sodium sulphate; d. 0.05-0.2% by weight of yeast extract; e. 0.5-2.0% by weight of dipotassium hydrogen phosphate(K2HPO4); f. 0.05-0.5% by weight of vitamin C; g. and the balance of water. During the process of preventing against corrosion from sulfate reducing bacteria in oil well, the inhibitor preventing against corrosion from sulfate reducing bacteria produced by the method can keep the content of sulfate reducing bacteria below 25 / ml in the case of 0.05-0.1% addition of the inventive inhibitor.

Description

Technical field

[0001] The invention belongs to the technical field of chemicals for the petroleum industry, and particularly relates to an inhibitor formula for preventing corrosion of sulfate reducing bacteria (SRB) and a preparation method thereof. In the process of preventing sulfate-reducing bacteria in oil wells, the content of sulfate-reducing bacteria in the system is less than 25 / ml under the condition of 0.05-0.1% increase. Background technique

[0002] Sulfate-reducing bacteria (SRB) is an anaerobic bacteria that uses organic matter as nutrients. It is widely found in soil, sea water, river water, underground pipelines, oil and gas wells, etc. Sulfate-reducing bacteria (SRB) can reduce the sulfate in water to hydrogen sulfide, so that the pH value of the local area drops below 4, which is serious for low-carbon steel, low-alloy steel, nickel alloy, austenitic stainless steel, and copper alloy steel. Pitting and the formation of black iron sulfide precipitates. In addit...

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