Novel bactericide for oil fields

A fungicide, a new technology, applied in the direction of chemicals for biological control, biocide, sterilization/microdynamic water/sewage treatment, etc., can solve the problems of complex production methods, high cost, corrosion of equipment pipelines, etc.

Inactive Publication Date: 2012-02-08
XINJIANG DELAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common method is to add fungicides to the reinjection water. This method is simple and quick, but only one kind of fungicides is used in a large amount. After a certain period of use, microorganisms can often develop resistance to it, resulting in its bactericidal ability. Decrease gradually, making the water quality complicated
Most of the fungicides used at this stage are single chlorine-based fungicides or quaternary ammonium salt fungicides, such as a compound fungicide for water treatment and its preparation method described in the patent app

Method used

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  • Novel bactericide for oil fields
  • Novel bactericide for oil fields
  • Novel bactericide for oil fields

Examples

Experimental program
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Effect test

Embodiment

[0028] The raw materials are prepared in parts by weight. Take 55 parts of 1227 and 18 parts of water and put them in the reaction kettle, add 9 parts of double ten quaternary ammonium salt (effective content ≥ 30.0%) under stirring, after mixing evenly, slowly add 4.5 parts Bronopol and 4.7 parts of glutaraldehyde; Continue to stir for 25 minutes at normal temperature and pressure, stop stirring to get the finished product;

[0029] Optimum preparation Take 60 parts of 1227 and 20 parts of water in a reaction kettle, add 10 parts of diquaternary ammonium salt (effective content ≥ 30.0%) under stirring, after mixing evenly, slowly add 5 parts of bromonide Alcohol and 5 parts of glutaraldehyde, continue to stir at normal temperature and pressure for 30 minutes, stop stirring to get the finished product; the sterilization rate of this product is above 95%.

[0030] Test site: An oil production well in Xinjiang, the reinjection water contains 5.8×10 bacteria SRB 5 , TGB is 3.2×1...

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Abstract

The invention relates to a novel bactericide for oil fields. The novel bactericide is prepared from the following raw materials, by weight, 55-65 parts of dodecyl dimethyl benzyl ammonium chloride (1227), 18-22 parts of water, 8-12 parts of a didecyl quaternary ammonium salt, 4-6 parts of bronopol, and 4-7 parts of glutaraldehyde. The novel bactericide is prepared through placing 1227 and water in a reaction vessel in order under normal temperature and normal pressure conditions, adding the didecyl quaternary ammonium salt with stirring, uniformly mixing, slowly adding bronopol and glutaraldehyde, and stirring for 20-30min. The effective content of the selected didecyl quaternary ammonium salt is equal to or greater than 30.0%. The novel bactericide which has good water solubility and has an extremely good corrosion resistance to metals has a sterilization rate of above 95%. The novel bactericide of the invention can be evaluated as a standard reaching product according to "a method for evaluating performances of a bactericide" of a petroleum standard SY/T5890-93.

Description

technical field [0001] The invention relates to a bactericide for reinjection water in oilfields, in particular to screening and modification. The obtained product has strong bactericidal performance, good water solubility and strong corrosion inhibition effect on metals. Background technique [0002] Water injection oil production is a measure commonly used in my country to increase crude oil production, but the problem of bacteria in oil injection water is universal, especially sulfate reducing bacteria (SRB) and saprophytic bacteria (TGB), which often cause corrosion of water injection equipment, and in severe cases Cause ground blockage. Therefore, sterilization and anticorrosion become more important in the process of oil recovery and water injection. The common method is to add fungicides to the reinjection water. This method is simple and quick, but only one kind of fungicides is used in a large amount. After a certain period of use, microorganisms can often develop ...

Claims

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Application Information

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IPC IPC(8): A01N35/02A01N33/20A01N33/12A01P1/00C02F1/50
Inventor 唐倩倩曾凡付田孝敬
Owner XINJIANG DELAND
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