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High-concentration preservative bactericide

A technology of anti-corrosion bactericide and bactericide, applied in the direction of biocide, bactericide/microdynamic water/sewage treatment, disinfectant, etc., can solve the problems of reducing bactericidal activity, poor application effect of bactericide, and reducing rock permeability, etc. Achieve good application effect and low water treatment cost

Active Publication Date: 2013-03-13
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the quaternary ammonium salt fungicides widely used in oilfields are cationic, and have good effect in water flooding sewage, but when used in polymer flooding sewage containing anionic polymers, they will react with polymers and reduce polymer viscosity. , and form water-insoluble flocs, attach to equipment and pipelines, form a biological fouling composed of various organic and inorganic substances including bacteria, block and corrode the water injection system, and enter the ground will reduce the rock Permeability
[0007] Poor field application effect of fungicides
Bactericides commonly used in oil fields are greatly affected by water quality, and the interaction between suspended particles in water, emulsified oil beads and other substances will reduce their bactericidal activity and even make them ineffective

Method used

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  • High-concentration preservative bactericide
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  • High-concentration preservative bactericide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First, add 1.5mol (45g) formaldehyde and 1mol (155g) 2-bromo-2-nitropropanediol to a 250ml four-neck flask equipped with a condensing reflux tube device, heat and reflux at 60°C, react for 3 hours to the end of the reaction, and cool to room temperature, filter to remove excess formaldehyde, and obtain the intermediate product hydroxymethyl ether compound; then, in a four-necked flask equipped with a condenser and a water separator device, add excess toluene and the intermediate product hydroxymethyl ether compound, and heat to Reflux at 100°C, use a water separator to separate water, cool down and filter when no water comes out of the system, and obtain the dehydration ring-closing product 1,3-dioxane six-membered ring compound.

[0021] Compound the synthetic fungicide main agent 1,3-dioxane six-membered ring compound with dibromonitrilopropionamide: first put 40g of dibromonitrilopropionamide into the beaker, start stirring and add 60g of fungicide The main ingredien...

Embodiment 2

[0023] First, add 2 mol of formaldehyde and 1 mol of 2-bromo-2-nitropropanediol into a 250ml four-necked flask equipped with a condensing reflux tube device, heat and reflux at 60°C, react for 3 hours to the end of the reaction, cool to room temperature, and filter to remove excess formaldehyde to obtain the intermediate product hydroxymethyl ether compound; then, in a four-necked flask equipped with a condenser and a water separator device, add excess toluene and the intermediate product hydroxymethyl ether compound, heat to 90 ° C and reflux, and use a water separator to Separate the water, and when no water comes out in the system, cool and filter to obtain the dehydration ring-closing product 1,3-dioxane six-membered ring compound.

[0024] Compound the synthetic fungicide main agent 1,3-dioxane six-membered ring compound with dibromonitrilopropionamide: first put 50g of dibromonitrilopropionamide into the flask, start stirring and add 50g of fungicide The main ingredient,...

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Abstract

The invention relates to a high-concentration preservative bactericide. The problem that the conventional bactericide cannot be widely applied to water drive and polymer flooding sewage is mainly solved. The high-concentration preservative bactericide comprises the following components in percentage by weight: 30-70 percent of bactericide main agent 1,3-dioxane hexatomic ring and 30-70 percent of dibromo-3-nitrilopionamide. The high-concentration preservative bactericide is suitable for water drive and polymer flooding sewage, and when the dosing concentration is 5mg / l, the residual water quality bacteria in a water delivery and injection well can be ensured to reach the standard.

Description

Technical field: [0001] The present invention relates to a bactericide in the field of oil recovery, especially a high-concentration antiseptic bactericide. Background technique: [0002] Bacterial corrosion is harmful to oilfield production, especially with the development of secondary and tertiary oil recovery technologies, most oilfields have entered a high water-cut development period, oilfield injection and water production are increasing, the water content of produced fluids is increasing, and the application of polymers, All these have created favorable conditions for the reproduction of bacteria in the oilfield system, making the problem of bacterial corrosion increasingly serious. [0003] The growth, metabolism and reproduction of microorganisms in the oilfield system can cause corrosion and damage of drilling equipment, water injection pipelines and other metal materials, blockage of pipelines and water injection wells; reduce the pore permeability of oil layers, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/32A01P1/00C07D319/06C02F1/50C09K8/54
Inventor 张永刚李彦庆唐国强滕陆洋李连客单大龙
Owner BC P INC CHINA NAT PETROLEUM CORP
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