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Bactericide for offshore oilfield reinjection water and preparation method thereof

An offshore oilfield and water reinjection technology, which is applied in the direction of fungicides, botanical equipment and methods, biocides, etc., can solve the problems of ineffective control and killing of microorganisms in oil-water systems, increasing the amount of fungicides, and bacterial resistance, etc. problem, to achieve the effect of good water solubility, good synergistic effect, and small foam

Inactive Publication Date: 2020-12-04
TIANJIN ZHENGDA SCI &TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a certain non-oxidizing fungicide is used alone in the reinjection water of offshore oilfields, it is easy to make the bacteria resistant. While increasing the dosage of the fungicide, it cannot effectively control and kill the microorganisms in the oil-water system, resulting in the risk of bacteria exceeding the standard.

Method used

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  • Bactericide for offshore oilfield reinjection water and preparation method thereof
  • Bactericide for offshore oilfield reinjection water and preparation method thereof
  • Bactericide for offshore oilfield reinjection water and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] A fungicide for reinjection water in offshore oilfields, the following raw materials are obtained in parts by mass: 4 g of trimethylamine, 4 g of epichlorohydrin; 4 g of diethylene triamine; 6 g of carbon disulfide; 12 g of tetrakis hydroxymethyl phosphorus sulfate; 6 g of glutaraldehyde ; Benzotriazole 2g; Ethanol 6g; Water 156g.

[0026] Concrete preparation method steps are as follows:

[0027] (1) In a four-necked flask with a stirring and reflux condenser, first add diethylenetriamine aqueous solution, start the agitator, cool in an ice-water bath, and cool the diethylenetriamine aqueous solution to below 20°C; turn on the reflux To the cooling water of the condenser, under the condition of stirring, add carbon disulfide dropwise with a separatory funnel. Strengthen the cooling, so that the temperature in the reactor is controlled at 20-25 °C, and the entire dropping time is about 2 hours. After the addition, the temperature was raised to reflux and reacted for 5...

Embodiment 2

[0031] A kind of fungicide for reinjection water in offshore oil field, the raw materials of the following mass fractions are taken: trimethylamine 6g, epichlorohydrin 9g; Diethylenetriamine 3g; Carbon disulfide 10g; Tetrahydroxymethyl phosphorus sulfate 40g; Glutaraldehyde 10g ; Benzotriazole 5g; Ethanol 10g; Water 127g.

[0032] Concrete preparation method comprises steps as follows:

[0033] (1) In a four-necked flask with a stirring and reflux condenser, first add diethylenetriamine aqueous solution, start the agitator, cool in an ice-water bath, and cool the diethylenetriamine aqueous solution to below 20°C; turn on the reflux To the cooling water of the condenser, under the condition of stirring, add carbon disulfide dropwise with a separatory funnel. Strengthen the cooling so that the temperature in the reactor is controlled at 25-30°C, and the entire dropping time is about 2 hours. After the addition, the temperature was raised to reflux and reacted for 6 hours until...

Embodiment 3

[0037] A fungicide for reinjection water in offshore oilfields, the following raw materials are obtained in parts by mass: 8 g of trimethylamine, 8 g of epichlorohydrin; 6 g of diethylenetriamine; 16 g of carbon disulfide; 50 g of tetrakis hydroxymethyl phosphorus sulfate; 10 g of glutaraldehyde ; Benzotriazole 2g; Ethanol 12g; Water 88g.

[0038] The preparation method steps are as follows:

[0039](1) In a four-neck flask with a stirring and reflux condenser, first add diethylenetriamine aqueous solution, start the agitator, cool in an ice-water bath, and cool the diethylenetriamine aqueous solution to below 20°C; turn on the reflux To the cooling water of the condenser, under the condition of stirring, add carbon disulfide dropwise with a separatory funnel. Strengthen the cooling so that the temperature in the reactor is controlled at 25-30°C, and the entire dropping time is about 2 hours. After the addition, the temperature was raised to reflux and reacted for 6 hours un...

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Abstract

The invention discloses a bactericide for offshore oilfield reinjection water and a preparation method thereof. The bactericide for offshore oilfield reinjection water comprises the following components: 4-28 parts of a polyquaternium dithiocarbamate compound; 5-30 parts of tetrakis hydroxymethyl phosphonium sulfate; 3-7 parts of glutaraldehyde; 1-4 parts of benzotriazole; 2-8 parts of ethanol; 23-85 parts of water. The bactericide for offshore oilfield reinjection water has the characteristics of good compatibility, good water solubility and small foam, has very good stripping and infiltration capacities and a good sterilization effect, can be used for an offshore oilfield reinjection water system, and can also be used for oilfield exploitation, gathering and transportation systems.

Description

technical field [0001] The invention relates to a fungicide for reinjection water in offshore oilfields and a preparation method thereof, belonging to the field of oilfield chemicals. Background technique [0002] Bacterial corrosion hazards in the petroleum industry have always existed in oilfield production, and have brought huge economic losses to oilfield production and operation. Especially with the development of secondary and tertiary oil recovery technologies, most oilfields have entered a high water-cut development period. The continuous increase of water production, the increase of the water content of the produced fluid, and the application of polymer flooding all create favorable conditions for the reproduction of bacteria in the oilfield system, making the problem of bacterial corrosion increasingly serious. [0003] Sulfate-reducing bacteria, iron bacteria, and saprophytic bacteria are the most common types of bacteria in the water injection system of offshore ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/14A01N35/02A01N31/02A01N43/647A01N57/20C02F1/50C09K8/54A01P3/00A01P1/00
CPCA01N31/02A01N35/02A01N43/647A01N47/14A01N57/20C02F1/50C09K8/54C09K2208/32
Inventor 薛瑞程耀丽徐铖仇进城刘学敏
Owner TIANJIN ZHENGDA SCI &TECH CO LTD
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