Compound bactericide for oilfield flooding system

Abstract

The invention relates to a compound bactericide for an oilfield flooding system, belonging to the technical field of oilfield sewage treatment. The compound bactericide for an oilfield flooding system is characterized by comprising the following components in percentage by weight: 70-80% of 45-55% (mass percent) benzalkonium chloride water solution, 10-20% of 25-35% (mass percent) cetylpyridinium bromide ethanol solution and 10-15% of 18-22% (mass percent) tetrachloroisophthalonitrile xylene solution. The compound bactericide for an oilfield flooding system has very high bactericidal effect, can effectively remove sulphate reducing bacteria, iron bacteria and saprophytic bacteria in the sewage and prevent the bacteria from corroding and blocking pipeline equipment, and has the advantages of simple components, convenient preparation, quick and efficient action, low cost, high bactericidal rate, low consumption, small side effect and the like.

Description

technical field

[0001] The invention belongs to the technical field of oilfield sewage treatment, in particular to a compound fungicide for oilfield water injection systems. Background technique

[0002] At present, in the oilfield water system, mainly in the water injection system of reinjecting sewage, the existence of microorganisms has brought great harm to oilfield production. Among them, sulfate-reducing bacteria are the most harmful. The product hydrogen sulfide is particularly corrosive to metals, and the product iron sulfide is a substance that causes pipeline blockage. The second is saprophytic bacteria and iron bacteria that can produce mucus. When the number of these bacteria exceeds a certain value, it can produce a difference in oxygen concentration to corrode the battery, resulting in blockage of the water injection well and a decrease in the injection rate.

[0003] In the oilfield water injection system, in order to prevent bacteria from corroding pipelines...

Examples

Embodiment 1

[0023] A kind of compound fungicide for oil field water injection system, its weight percentage is composed of: benzalkonium chloride (50% mass fraction aqueous solution) 70%, cetylpyridinium bromide (30% mass fraction ethanol solution) 20% , tetrachloroisophthalonitrile (mass fraction 20% xylene solution) 10%.

[0024] The composite bactericide for the oilfield water injection system is made by mechanically mixing the solutions of benzalkonium chloride, cetylpyridinium bromide and tetrachloroisophthalonitrile.

Embodiment 2

[0026] A kind of composite fungicide for oil field water injection system, its weight percentage is composed of: benzalkonium chloride (50% mass fraction aqueous solution) 80%, cetylpyridinium bromide (30% mass fraction ethanol solution) 10% , tetrachloroisophthalonitrile (mass fraction 20% xylene solution) 10%.

[0027] The composite bactericide for the oilfield water injection system is made by mechanically mixing the solutions of benzalkonium chloride, cetylpyridinium bromide and tetrachloroisophthalonitrile.

Embodiment 3

[0029] Preparation and Application of Bactericide BCW-01 for Oilfield Water Injection System

[0030] Component distribution (by weight): benzalkonium chloride: 70%, cetylpyridinium bromide: 15%, tetrachloroisophthalonitrile: 15%.

[0031] Preparation method: mechanically mix according to the formula

[0032] Subject of the experiment: an oil skimmer on an offshore platform

[0033] Experimental method: Take 100ml of experimental water sample, add different concentrations of fungicide BCW-01, dilute according to the unique dilution method, and incubate in an incubator (65 degrees) for 7 days, measure the total number of bacteria, and calculate the sterilization rate.

[0034] The results are shown in Table 1.

[0035] Table 1 Bactericidal effect of different concentrations of fungicide BCW-01

[0036]

[0037]

technical field

[0001] The invention belongs to the technical field of oilfield sewage treatment, in particular to a compound fungicide for oilfield water injection systems. Background technique

[0002] At present, in the oilfield water system, mainly in the water injection system of reinjecting sewage, the existence of microorganisms has brought great harm to oilfield production. Among them, sulfate-reducing bacteria are the most harmful. The product hydrogen sulfide is particularly corrosive to metals, and the product iron sulfide is a substance that causes pipeline blockage. The second is saprophytic bacteria and iron bacteria that can produce mucus. When the number of these bacteria exceeds a certain value, it can produce a difference in oxygen concentration to corrode the battery, resulting in blockage of the water injection well and a decrease in the injection rate.

[0003] In the oilfield water injection system, in order to prevent bacteria from corroding pipelines...

Examples

Embodiment 1

[0023] A kind of compound fungicide for oil field water injection system, its weight percentage is composed of: benzalkonium chloride (50% mass fraction aqueous solution) 70%, cetylpyridinium bromide (30% mass fraction ethanol solution) 20% , tetrachloroisophthalonitrile (mass fraction 20% xylene solution) 10%.

[0024] The composite bactericide for the oilfield water injection system is made by mechanically mixing the solutions of benzalkonium chloride, cetylpyridinium bromide and tetrachloroisophthalonitrile.

Embodiment 2

[0026] A kind of composite fungicide for oil field water injection system, its weight percentage is composed of: benzalkonium chloride (50% mass fraction aqueous solution) 80%, cetylpyridinium bromide (30% mass fraction ethanol solution) 10% , tetrachloroisophthalonitrile (mass fraction 20% xylene solution) 10%.

[0027] The composite bactericide for the oilfield water injection system is made by mechanically mixing the solutions of benzalkonium chloride, cetylpyridinium bromide and tetrachloroisophthalonitrile.

Embodiment 3

[0029] Preparation and Application of Bactericide BCW-01 for Oilfield Water Injection System

[0030] Component distribution (by weight): benzalkonium chloride: 70%, cetylpyridinium bromide: 15%, tetrachloroisophthalonitrile: 15%.

[0031] Preparation method: mechanically mix according to the formula

[0032] Subject of the experiment: an oil skimmer on an offshore platform

[0033] Experimental method: Take 100ml of experimental water sample, add different concentrations of fungicide BCW-01, dilute according to the unique dilution method, and incubate in an incubator (65 degrees) for 7 days, measure the total number of bacteria, and calculate the sterilization rate.

[0034] The results are shown in Table 1.

[0035] Table 1 Bactericidal effect of different concentrations of fungicide BCW-01

[0036]

[0037]

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