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Composite bactericide for oilfield reverse flooding, and preparation method thereof

A compound fungicide and oil field technology, which is applied in the direction of botany equipment and methods, biocide, disinfectant, etc., and can solve the problem of large usage

Inactive Publication Date: 2019-08-16
临沂康爱特化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional oil field fungicide 1227 is used in large quantities, and long-term use will cause bacteria to develop tolerance. Therefore, the development of a compound oil field fungicide has very important practical significance for oil field production

Method used

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  • Composite bactericide for oilfield reverse flooding, and preparation method thereof
  • Composite bactericide for oilfield reverse flooding, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First synthesize N-alkyl diquaternary ammonium salt:

[0025] Will C 14 330 kilograms of alkyl dimethyl tertiary amines, 70 kilograms of ethyl benzyl chloride, 100 kilograms of ethyl benzyl dichloride, 200 kilograms of ethanol and 300 kilograms of water are inhaled in the reactor. When the temperature reaches 58 degrees Celsius, the steam valve is closed to stop heating, and the heat preservation reaction is carried out for 5 hours. At the end of the heat preservation, send samples for analysis. In the fungicide obtained, the content of quaternary ammonium salts should be ≥50%, and the content of free amines should be ≤1.5%. After passing the analysis, the temperature should be lowered.

[0026] Add 400 kg of 50% N-alkyl bis-quaternary ammonium salt and 600 kg of 70% dodecyl dimethyl benzyl ammonium chloride successively in the mixing tank, stir for 30 minutes after adding all the raw materials, and obtain the compound fungicide for oilfield reinjection water .

Embodiment 2

[0028] Add 300 kg of 50% N-alkyl bis-quaternary ammonium salt and 700 kg of 70% dodecyl dimethyl benzyl ammonium chloride in sequence in the mixing tank. After adding all the raw materials, stir for 30 minutes to prepare the compound fungicide for oilfield reinjection water .

Embodiment 3

[0030] Add 350 kg of 50% N-alkyl bis-quaternary ammonium salt and 650 kg of 70% dodecyl dimethyl benzyl ammonium chloride in sequence in the mixing tank. After adding all the raw materials, stir for 30 minutes to prepare the compound fungicide for oilfield reinjection water .

[0031] The water used for bactericidal performance evaluation in Examples 1~3 is the reinjection water of a joint station in Daqing. The evaluation method is operated according to the standard of SY / T0532-2012 oil field injection water bacterial analysis method extinction dilution method. The above examples are performed at a dosage concentration of 8mg The effect of / l is shown in the following table:

[0032]

[0033] It can be seen from the above table that the product obtained in the present invention has a strong bactericidal effect, can effectively remove sulfate-reducing bacteria, iron bacteria, and saprophytic bacteria in oilfield refill water, and has a simple preparation method, low product...

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PUM

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Abstract

The invention discloses a composite bactericide for oilfield reverse flooding, and a preparation method thereof, and belongs to the technical field of oilfield exploitation and sterilization. The composite bactericide is prepared from 30-40 wt% of 50% N-alkyl bisquaternary ammonium salt and 60-70 wt% of 70% dodecyl dimethyl benzyl ammonium chloride. The 50% N-alkyl bisquaternary ammonium salt andthe 70% dodecyl dimethyl benzyl ammonium chloride are sequentially added into a stirring tank, and are stirred for 30 min after the complete addition of the raw materials in order to obtain the composite bactericide for oilfield reverse flooding. The composite bactericide has the advantages of strong bactericidal effect, effectiveness in removal of sulfate reducing bacteria, iron bacteria and saprophytic bacteria in flooded water, simple preparation method, low production cost, low use amount and high sterilization rate.

Description

technical field [0001] The invention relates to a compound fungicide for oilfield back-injection water and a preparation method thereof, belonging to the technical field of oilfield mining sterilization. Background technique [0002] In order to maintain the pressure of the oil layer in the current stage of oilfield development in my country, a large amount of reinjection water needs to be injected back into the oil layer. Most of the reinjection water comes from oily sewage after deoiling crude oil. Oily sewage contains a large amount of minerals, crude oil, suspended solids, and scaling ions. The impurities here lead to a large number of sulfate-reducing bacteria, iron bacteria, and saprophytic bacteria. breed. [0003] The metabolites of these bacteria can cause corrosion of metal components in drilling and production equipment, so the bacteria in the injection water need to be controlled. The traditional oil field fungicide 1227 is used in large quantities, and long-te...

Claims

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Application Information

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IPC IPC(8): A01N33/12A01P1/00
CPCA01N33/12
Inventor 江立鼎钱青张鑫
Owner 临沂康爱特化工科技有限公司
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