A high-efficiency corrosion inhibitor and fungicide for oilfield water injection

An oil field water injection and fungicide technology, which is applied in biocides, disinfectants, animal repellants, etc., can solve problems such as damage to water injection pipelines and other equipment, and achieve the effects of low cost, good synergy and obvious application effect.

Active Publication Date: 2021-07-23
XIAN AODE PETROCHEM ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The influence of biological factors is mainly due to the complexity of the oilfield water injection system. There are also a large number of corrosive steel organisms in the oilfield water injection system, such as sulfate reducing bacteria (SRB), iron bacteria (FB), and saprophytic bacteria (TGB). etc. These bacteria can reproduce in large numbers under anoxic conditions, produce a large amount of corrosive products, and cause serious damage to water injection pipelines and other equipment

Method used

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  • A high-efficiency corrosion inhibitor and fungicide for oilfield water injection
  • A high-efficiency corrosion inhibitor and fungicide for oilfield water injection
  • A high-efficiency corrosion inhibitor and fungicide for oilfield water injection

Examples

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Effect test

Embodiment 1

[0030] Taking the preparation of 1 kg of efficient corrosion inhibitor bactericide for oilfield water injection of the present invention as an example, it is made from the raw materials of the following mass proportions:

[0031]

[0032]

[0033] Its preparation method is: first add 40g of sodium chloride into 660g of water, after completely dissolving, then successively add 40g of fatty alcohol polyoxyethylene ether, 100g of ethanol, 30g of dodecyl dimethyl sulfite betaine, 40g of decane Dialkylamine polyoxyethylene ether bisquaternary ammonium salt and 80 g of decyl bis(2-carboxamido-1-octadecylpyridinium chloride) were added thereinto and stirred evenly.

[0034] The molecular formula of fatty alcohol polyoxyethylene ether in the present embodiment is as follows:

[0035]

Embodiment 2

[0037] Taking the preparation of 1 kg of efficient corrosion inhibitor bactericide for oilfield water injection of the present invention as an example, it is made from the raw materials of the following mass proportions:

[0038]

[0039] Its preparation method is identical with embodiment 1.

[0040] The molecular formula of fatty alcohol polyoxyethylene ether in the present embodiment is as follows:

[0041]

Embodiment 3

[0043] Taking the preparation of 1 kg of efficient corrosion inhibitor bactericide for oilfield water injection of the present invention as an example, it is made from the raw materials of the following mass proportions:

[0044]

[0045]

[0046] Its preparation method is identical with embodiment 1.

[0047] The molecular formula of fatty alcohol polyoxyethylene ether in the present embodiment is as follows:

[0048]

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Abstract

The invention discloses a high-efficiency corrosion-inhibiting bactericide for oil field water injection, which is mixed with the following components according to the mass percentage: 7%-15% of decyl bis(formamido-1-octadecyl pyridinium chloride) , Alkyl dimethyl sulfite betaine 2%~6%, Alkylamine polyoxyethylene ether diquaternary ammonium salt 3%~7%, Fatty alcohol polyoxyethylene ether 3%~6%, Sodium chloride 5% to 9%, ethanol 9% to 21%, and the balance is water. The oil field water injection corrosion inhibitor of the present invention has the properties of bactericidal, low freezing point, small dosage, non-toxic, phosphorus-free, and environmentally friendly, and the corrosion inhibition rate for Q235 steel is greater than the index of 70 in the temperature range of <55 °C %, uniform corrosion, and its bactericidal performance also meets the requirements of oil field injection water indicators. In the field of oil field production, it can meet the requirements of oil field injection water for corrosion resistance of pipelines and equipment.

Description

technical field [0001] The invention belongs to the technical field of oil field water injection anticorrosion, and specifically relates to a high-efficiency corrosion-inhibiting bactericide for oil field water injection, which can be used as a high-efficiency corrosion-inhibiting bactericide for oil field injection water anti-corrosion and sterilization, and can also be used as oil field hydrochloric acid acidification, power plants, chemical industry, metallurgy Corrosion inhibitor for hydrochloric acid pickling of machinery and other equipment. Background technique [0002] After the oil field is put into development, with the increase of production time, the energy of the oil layer itself will be continuously consumed, resulting in a continuous drop in the pressure of the oil layer, a large amount of degassing of the underground crude oil, an increase in the viscosity, a great reduction in the production of the oil well, and even the stop of spraying and production, resul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/40A01N25/30A01P1/00C09K8/54
CPCA01N43/40A01N25/30C09K8/54C23F11/149
Inventor 刘彦锋于秋玲凌洁任丽吴继平
Owner XIAN AODE PETROCHEM ENG TECH CO LTD
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