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Bactericide for sulfate reducing bacteria in polymer-containing produced liquid as well as preparation method and application of bactericide

A sulfate and fungicide technology, applied in the field of fungicides and preparations of sulfate-reducing bacteria in polymer-containing production fluids, can solve the problem of affecting the viscosity of polymer-containing production fluids, affecting the use of fungicides, and reducing the use of agents and other problems, to achieve excellent bactericidal effect, good adaptability, and low concentration

Active Publication Date: 2022-03-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is a single variety of bactericides for oilfield production water, and most of the products are quaternary ammonium salts or compound agents based on them; most of the bactericidal groups of quaternary ammonium salts are cationic, which are easy to combine with the anions contained in the production fluid. The reaction of the fungicide-type polymer not only affects the use effect of the fungicide, but also affects the viscosity of the polymer-containing production fluid; and due to the long-term use of a single fungicide variety, the bacteria will develop a certain resistance to this fungicide, resulting in the use of the fungicide. Significantly decreased; in addition, the use concentration of existing fungicides is relatively large

Method used

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  • Bactericide for sulfate reducing bacteria in polymer-containing produced liquid as well as preparation method and application of bactericide
  • Bactericide for sulfate reducing bacteria in polymer-containing produced liquid as well as preparation method and application of bactericide
  • Bactericide for sulfate reducing bacteria in polymer-containing produced liquid as well as preparation method and application of bactericide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: Bactericide DGCMA and its preparation method and application method

[0048] A fungicide DGCMA used for sulfate-reducing bacteria in poly-containing production fluid has the following structure:

[0049]

[0050] The preparation method of above-mentioned bactericide DGCMA

[0051] ① Weigh 1.0312g of dodecylamine and 1.0200g of 1H-pyrazole-1-carboxamidine hydrochloride, put them in a flask, add 10mL of methanol as solvent, then raise the temperature to 40°C, stir at 200r / min, and stir After 48 hours, after the reaction was completed, the solvent methanol was distilled off under reduced pressure, acetone was added for recrystallization, a solid sample was obtained by suction filtration, and an intermediate product was obtained after vacuum drying, with a molar yield of 74.35%;

[0052] ②Weigh 0.5368g of the above intermediate, 0.2620g of 2,3-dimethylmaleic anhydride, 0.5224g of N,N-diisopropylethylamine, put them in a flask, add 5mL of dichloromethane an...

Embodiment 2

[0057] Embodiment 2: fungicide TGCMA and its preparation method and application method

[0058] A bactericide TGCMA used for sulfate-reducing bacteria in poly-containing production fluid has the following structure:

[0059]

[0060] The preparation method of above-mentioned bactericide TGCMA

[0061] ①Weigh 2.1384g of the above tetradecylamine and 1.6230g of 1H-pyrazole-1-carboxamidine hydrochloride, put them into a flask, add 20mL of methanol as a solvent, then raise the temperature to 40°C, and stir at a rate of 200r / min. Reacted for 48 hours. After the reaction, the solvent methanol was distilled off under reduced pressure, acetone was added for recrystallization, a solid sample was obtained by suction filtration, and an intermediate product was obtained after vacuum drying with a molar yield of 82.30%;

[0062] ②Weigh 0.5884g of the above intermediate, 0.2534g of 2,3-dimethylmaleic anhydride, 0.5334g of N,N-diisopropylethylamine, put them in a flask, add 5mL of dichlo...

Embodiment 3

[0067] Embodiment 3: bactericide CGCMA and its preparation method and application method

[0068] A fungicide CGCMA used for sulfate-reducing bacteria in poly-containing production fluid has the following structure:

[0069]

[0070] The preparation method of above-mentioned bactericide CGCMA

[0071] ① Weigh 2.4218g of the above-mentioned hexadecylamine and 1.6357g of 1H-pyrazole-1-carboxamidine hydrochloride, put them in a flask, add 20mL of methanol as a solvent, then raise the temperature to 40°C, and stir at a rate of 200r / min. Reacted for 48 hours. After the reaction, the solvent methanol was distilled off under reduced pressure, acetone was added for recrystallization, a solid sample was obtained by suction filtration, and an intermediate product was obtained after vacuum drying, with a molar yield of 84.17%;

[0072] ②Weigh 2.2163g of the above intermediate, 1.0034g of 2,3-dimethylmaleic anhydride, 2.1077g of N,N-diisopropylethylamine, put them into a flask, add 10...

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Abstract

The invention provides a bactericide for sulfate reducing bacteria in polymer-containing produced liquid as well as a preparation method and application of the bactericide. The bactericide is prepared by the following steps: reacting linear alkylamine with 1H-pyrazole-1-formamidine hydrochloride to obtain an intermediate, and reacting the intermediate with anhydride. The bactericide provided by the invention does not react with anionic polymers in the polymer-containing produced liquid, does not influence the viscosity of the polymer-containing produced liquid, has a good bactericidal effect, can realize an excellent bactericidal effect at a small concentration of the bactericide, has strong adaptability, does not cause the drug resistance of bacteria, and also has a certain corrosion inhibition effect.

Description

technical field [0001] The invention relates to the technical field of oilfield sewage treatment, in particular to a bactericide for sulfate-reducing bacteria in production fluids containing polymers, a preparation method and application thereof. Background technique [0002] The growth, metabolism and reproduction of microorganisms (such as sulfate-reducing bacteria, iron bacteria, and saprophytic bacteria) in the oilfield reinjection water system can cause corrosion and damage of drilling equipment, water injection pipelines and other metal materials, and blockage of pipelines and water injection wells; The pore permeability of the oil layer decreases, which hinders water injection and oil recovery; it can even degrade other oilfield chemicals and reduce the use efficiency of chemicals. These hazards will bring huge economic losses to oilfield production and operation. [0003] The method of controlling bacteria in oil fields is generally to add fungicides. This method ha...

Claims

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Application Information

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IPC IPC(8): C02F1/50C07C279/22C07C279/04C07C277/08A01N47/44A01N33/12A01P1/00C23F11/14C02F103/10
CPCC02F1/50C07C279/22C07C277/08A01N47/44A01N33/12C23F11/146C02F2103/10C02F2303/04C02F2303/08Y02A50/30
Inventor 于丽吴达宓静如台文君
Owner SHANDONG UNIV
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