CN-121986786-A - Bactericide synergist, corrosive biological film bactericidal composition and use method

Abstract

The invention discloses a bactericide synergist, a corrosion biological film bactericidal composition and a use method, and relates to the technical field of microbial corrosion protection of oil and gas fields, wherein the bactericide synergist comprises D tyrosine with the concentration of 0.1-2 ppm, a single amino acid is adopted to have a good synergistic effect on a bactericide, and meanwhile, the corrosion biological film bactericidal composition comprises dibromocyanoacetamide, nano silver, limonene and the bactericide synergist, and the bactericidal composition has antibacterial and microbial corrosion resistance and can be used in microbial corrosion protection operation of oil and gas fields.

Inventors

• LIU HANJUN
• WANG XIAOLI
• SUN YU
• XU DAKE
• WANG DI
• XIONG JIAHAO
• HE SHA
• JIANG XUEBIN
• ZOU YIWEI
• LI HAIHONG

Assignees

• 中国石油天然气集团有限公司
• 中国石油集团川庆钻探工程有限公司

Dates

Publication Date

20260508

Application Date

20241104

Claims (10)

1. 1. A bactericide synergist is characterized by comprising D tyrosine with the concentration of 0.1-2 ppm.
2. 2. A corrosion biological film sterilization composition is characterized by comprising dibromocyanoacetamide, nano silver and limonene and the bactericide synergist of claim 1.
3. 3. The corrosion biofilm sterilization composition of claim 2, wherein the concentration of the dibromocyanoacetamide is 10-100 ppm.
4. 4. The corrosion biofilm sterilization composition of claim 2, wherein the concentration of the nano silver is 1-30 ppm.
5. 5. The corrosive biological film sterilizing composition according to claim 2, wherein the concentration of the limonene is 1-50 ppm.
6. 6. The composition of claim 2, further comprising one or more of a solvent, a cosolvent, an emulsifier, a stabilizer, a wetting agent, a dispersant, a defoamer, and an antifreeze.
7. 7. A method of using the corrosive biofilm bactericidal composition of any of claims 2 to 6, including the steps of: I. dissolving dibromocyanoacetamide and limonene in a solvent to prepare mother liquor; II. When the method is used, the mother solution is diluted to the concentration of 10-100 ppm of dibromocyanoacetamide and the concentration of limonene is 1-50 ppm; III, adding nano silver to enable the concentration of the nano silver to be 1-30 ppm; IV, adding a bactericide synergist to enable the concentration of the bactericide synergist to be 0.1-1 ppm, and enabling the obtained mixture to be in contact with the corrosion biological film.
8. 8. The method of claim 7, wherein in step I, the mother liquor is filtered through a sterilizing filter.
9. 9. The method of claim 7, wherein in step I, the solvent is deionized water.
10. 10. The method for using the corrosion biological film sterilization composition according to claim 7, wherein in the step IV, the concentration of the sterilization synergistic agent in the mixture is 0.1-1 ppm, the concentration of dibromocyanoacetamide is 10-50 ppm, the concentration of nano silver is 1-10 ppm, and the concentration of limonene is 1-10 ppm.

Description

Bactericide synergist, corrosive biological film bactericidal composition and use method Technical Field The invention relates to the technical field of microbial corrosion protection of oil and gas fields, in particular to a bactericide synergist, a corrosive biological film sterilization composition and a use method thereof. Background Because of the imbalance of oil and gas resource distribution, in order to further reduce transportation loss and cost and improve production efficiency and safety standard, pipelines are selected to be used for oil and gas storage and transportation in many areas so as to meet the oil and gas requirements of different areas. Therefore, the corrosion prevention work of the oil and gas gathering and conveying pipeline is finished, and the economic development is promoted to a certain extent. In use, the corrosion of the oil and gas gathering pipeline is found to be caused by a plurality of factors, such as unqualified pipeline quality, unscientific corrosion prevention technology, interference of external environmental factors and the like. Among them, failure of oil and gas gathering pipelines due to Sulfate Reducing Bacteria (SRB) corrosion can lead to catastrophic safety consequences and huge economic losses for society. In order to control microbial corrosion, the most common approach is to utilize bactericides to control biofilm formation and growth, thereby reducing the likelihood of microbial corrosion. The biggest problem faced by these biocides is the high cost and poor bactericidal effect, typically on the order of 3 orders of magnitude. The long-term use of a single bactericide leads to the problems of improved drug resistance of microorganisms, increased dosage of the bactericide, increased cost and the like. In recent years, research on enhancing the efficacy of bactericides by adding a bactericide synergist has been receiving general attention, and the technology is that signal molecules are combined with SRB proteins, so that bacterial biofilms fall off in a large area, and corrosive microorganisms in a film state are converted into microorganisms in a free state, so that the efficacy of the bactericides is enhanced. In the patent application of the invention disclosed in 2022, 5 and 6, with publication number of CN114431227A, named as a biological film sterilization synergist, a biological film sterilization composition and a biological film removal method, the combination of D-amino acid and non-oxidation bactericide is adopted to perform sterilization, so that the efficiency of the bactericide is improved. In the above scheme, a complex D-amino acid combination is required, and the combination of a single amino acid and a bactericide has no synergistic effect or little effect on mixed microorganisms. Disclosure of Invention The invention provides a bactericide synergist, which adopts a single amino acid to be combined with a bactericide to achieve the effect of enhancing the sterilizing effect of the bactericide, has a simple formula and is more convenient for operators to control the proportion of reagents, and the aims of solving the defects in the prior art of microbial corrosion protection of oil and gas fields are fulfilled. The invention is realized by the following technical scheme: A bactericide synergist comprises D tyrosine with the concentration of 0.1-2 ppm. A corrosion biofilm disinfectant composition comprising dibromocyanoacetamide, nano silver and limonene and the disinfectant synergist of claim 1. Further, the concentration of the dibromocyanoacetamide is 10-100 ppm. Further, the concentration of the nano silver is 1-30 ppm. Further, the concentration of the limonene is 1-50 ppm. Further, the sterilization composition also comprises one or more of a solvent, a cosolvent, an emulsifier, a stabilizer, a wetting agent, a dispersing agent, a defoaming agent and an antifreezing agent which do not reduce the sterilization effect. A method of using the corrosive biofilm sterilization composition as claimed in any of the preceding claims, including the steps of: I. dissolving dibromocyanoacetamide and limonene in a solvent to prepare mother liquor; II. When the method is used, the mother solution is diluted to the concentration of 10-100 ppm of dibromocyanoacetamide and the concentration of limonene is 1-50 ppm; III, adding nano silver to enable the concentration of the nano silver to be 1-30 ppm; IV, adding a bactericide synergist to enable the concentration of the bactericide synergist to be 0.1-1 ppm, and enabling the obtained mixture to be in contact with the corrosion biological film. Further, in step I, the mother liquor is filtered with a sterilizing filter. Further, in step I, the solvent is deionized water. In the step IV, the concentration of the sterilization synergistic agent in the mixture is preferably 0.1-1 ppm, the concentration of the dibromocyanoacetamide is preferably 10-50 ppm, the concentration of the nano silver is preferably