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Bactericide used in oilfield water treatment system and its preparation method and application

A technology of bactericides and buffers, applied in the chemical, application, biocide and other directions for biological control, can solve the problems of short duration of efficacy and low bactericidal efficiency of bactericides, and achieve long duration of efficacy, The effect of low cost and simple process

Active Publication Date: 2020-09-04
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the prior art provides a variety of fungicides, these fungicides have low bactericidal efficiency and short duration of efficacy

Method used

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  • Bactericide used in oilfield water treatment system and its preparation method and application
  • Bactericide used in oilfield water treatment system and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The composition of the fungicide provided in this example is composed by weight: 5% dodecyldimethylbenzyl ammonium chloride, 5% D-methionine, 20% dodecyldimethylbetaine, Na 2 HPO 4 0.5%, NaHCO 3 1.5%, water 58%. Dodecyl dimethyl benzyl ammonium chloride, D-methionine, dodecyl dimethyl betaine, Na 2 HPO 4 , NaHCO 3 Add water and water into the reaction kettle in proportion, and stir thoroughly for 1 hour until a uniform solution is formed to obtain the bactericide of this example.

Embodiment 2

[0024] The composition of the fungicide provided in this example is composed by weight: 15% of dodecyl dimethyl benzyl ammonium bromide, 3% of D-tyrosine, 15% of cocamidopropyl betaine, Na 2 HPO 4 1%, NaHCO 3 2.5%, water 63.5%. Dodecyl dimethyl benzyl ammonium bromide, D-tyrosine, cocamidopropyl betaine, Na 2 HPO 4 , NaHCO 3 Add water and water into the reaction kettle in proportion, and stir thoroughly for 1.5 hours until a uniform solution is formed to obtain the bactericide of this example.

Embodiment 3

[0026] The composition of the bactericide provided in this example is composed by weight: 30% of dodecyl dimethyl benzyl ammonium chloride, 2% of D-leucine, and 10% of dodecyl dimethyl betaine , Na 2 HPO 4 1.5%, NaHCO 3 0.5%, water 56%. Dodecyl dimethyl benzyl ammonium chloride, D-leucine, dodecyl dimethyl betaine, Na 2 HPO 4 , NaHCO 3 Add water and water into the reaction kettle in proportion, and stir thoroughly for 1 hour until a uniform solution is formed to obtain the bactericide of this example.

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Abstract

The invention provides a sterilizing agent for an oilfield water treatment system as well as a preparation method and application thereof. The sterilizing agent is prepared from the following components of 5wt.% to 60wt.% of dodecyl dimethyl benzyl ammonium halide, 0.5wt.% to 5wt.% of D-amino acid, 10wt.% to 30wt.% of surfactant, 3wt.% to 10wt.% of buffer agent and the balance of water. The sterilizing agent has the advantages that the sterilizing efficiency is high, the efficient sterilizing property on SRB (sulfate reducing bacteria) and TGB (total general bacteria) is realized, the durationof effect is long, the production process is simple, and the cost is low.

Description

technical field [0001] The invention relates to a bactericide used in an oilfield water treatment system and its preparation method and application, belonging to the technical field of oilfield chemistry. Background technique [0002] With the continuous development of oilfields, most of my country's onshore oilfields have entered the mid-to-late development period, and the water content of produced fluids has continued to rise, and the water content of some blocks has reached more than 90%. Most of the oil production wastewater is treated and reinjected into the oil layer. The reinjection of oilfield wastewater can not only supplement the energy of the formation, maintain the stable production of the oilfield, improve the recovery rate, but also reduce the harm caused by the sewage discharge to human beings and the ecological system, which is beneficial to the protection of the environment. There are many types of microorganisms in oilfield reinjection water, which can caus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N33/12A01N41/12A01N37/44A01N43/38A01P1/00
Inventor 于浩波赵雄陈长风于延钊姜瑞景何洋
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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