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Fungicide for compound oilfield reinjection water, and preparation method therefor

A technology for oil field re-injection of water and fungicides, applied in the fields of botanical equipment and methods, biocides, sterilization/microdynamic water/sewage treatment, etc. problem, to achieve the effect of stable hydrolysis, saving pharmaceutical costs, and good killing effect

Active Publication Date: 2015-12-02
WEIHAI XIANGYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, factors such as environmental protection must also be considered. Some agents have a strong bactericidal ability but cannot be biodegraded. Some agents can kill this kind of bacteria but are nutrient solutions for other bacteria. These cannot be used for oil field sterilization.
In addition, the geological conditions of the oil field and impurities in the water will affect the efficacy of fungicides
At present, the oilfield fungicides with better application effects are mainly surfactants, but because a large amount of foam will be generated when the surfactant fungicides are put in, and the surfactant fungicides will complex with organic matter and other impurities in the water. Loss of bactericidal efficiency, so it is often necessary to add defoamers when using surfactant-based bactericides, and at the same time, strict operation management such as cleaning, reverse drainage, and acidification of oil wells must be carried out
The vitality of bacteria is extremely strong, and any kind of fungicides used for a long time will cause bacteria to develop drug resistance, causing problems such as a decrease in the bactericidal efficiency of the fungicide and an increase in the dosage of the fungicide. Therefore, it is necessary to continuously develop new oil field fungicides

Method used

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  • Fungicide for compound oilfield reinjection water, and preparation method therefor
  • Fungicide for compound oilfield reinjection water, and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Weigh 20 g of tetrakis hydroxymethyl phosphorus chloride, 15 g of dibromonitrilopropionamide, 20 g of 50% glutaraldehyde aqueous solution, and 45 g of pure water.

[0015] Add pure water, tetrakishydroxymethylphosphorus chloride, dibromonitrilopropionamide, and 50% glutaraldehyde aqueous solution into the container in sequence, and stir at room temperature for 4 to 5 hours to obtain 100 g of the product.

Embodiment 2

[0017] Weigh 30 g of tetrakis hydroxymethyl phosphorus chloride, 10 g of dibromonitrilopropionamide, 30 g of 50% glutaraldehyde aqueous solution, and 30 g of pure water.

[0018] Add pure water, tetrakishydroxymethylphosphorus chloride, dibromonitrilopropionamide, and 50% glutaraldehyde aqueous solution into the container sequentially in proportion, and stir at room temperature for 4 to 5 hours to obtain 100 g of the product.

Embodiment 3

[0020] Weigh 30 g of tetrakis hydroxymethyl phosphorus chloride, 20 g of dibromonitrilopropionamide, 10 g of 50% glutaraldehyde aqueous solution, and 40 g of pure water.

[0021] Add pure water, tetrakishydroxymethylphosphorus chloride, dibromonitrilopropionamide and butanediamine into the container sequentially in proportion, and stir at room temperature for 4-5 hours to obtain 100 g of the product.

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PUM

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Abstract

The present invention relates to a treatment medicament for oilfield reinjection water, and particularly to a fungicide for compound oilfield reinjection water, and a preparation method therefor. A technical scheme of the invention is: a fungicide for compound oilfield reinjection water is prepared by quaternary phosphonium salt, dibromo nitrilo propionamide, 50% glutaraldehyde solution, and water, wherein the mass ratio of the quaternary phosphonium salt, the dibromo nitrilo propionamide, the 50% glutaraldehyde solution, and the water is 20-30: 10-20: 10-20: 30-60. The quaternary phosphonium salt is one of tetrakis hydroxymethyl phosphonium chloride and tetrakis hydroxymethyl phosphonium sulfate. The present invention provides a highly efficient fungicide for compound oilfield reinjection water.

Description

technical field [0001] The invention relates to a medicament for oilfield reinjection water treatment, in particular to a compound oilfield reinjection water bactericide and a preparation method thereof. Background technique [0002] In the secondary oil recovery of oilfields, a large amount of reinjection water is required. Because the reinjection water contains sulfate reducing bacteria (SRB), saprophytic bacteria (TGB) and iron bacteria (IB), it is easy to cause metal corrosion, formation blockage, chemical agent deterioration, etc. Series of bacterial microorganisms that are not conducive to waterflood recovery. At the same time, the reinjection water contains high calcium and magnesium ions, which is prone to serious scaling of water injection pipelines and formations, thus causing blockage of water injection pipelines and formations. All of these have caused huge economic losses to oil field production and operation. Therefore, it is necessary to add fungicides and c...

Claims

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Application Information

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IPC IPC(8): A01N57/20A01N1/00A01N3/00C02F1/50C02F103/10
Inventor 张晓冬李洪社喻果
Owner WEIHAI XIANGYU TECH
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