High-efficiency corrosion inhibiting bactericide for oilfield water flooding

An oilfield water injection and fungicide technology, applied in biocides, disinfectants, animal repellents, etc., can solve problems such as damage to water injection pipelines and other equipment, achieve low cost, obvious application effects, and reduce investment and operation costs

Active Publication Date: 2019-09-27
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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  • High-efficiency corrosion inhibiting bactericide for oilfield water flooding
  • High-efficiency corrosion inhibiting bactericide for oilfield water flooding
  • High-efficiency corrosion inhibiting bactericide for oilfield water flooding

Examples

Experimental program
Comparison scheme
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 oilfield water flooding. The high-efficiency corrosion inhibiting bactericide is prepared through mixing, by mass, 7-15% of decene bis(formylamino-1-octadecylpyridinium chloride), 2-6% of alkyldimethyl sulfitonetaine, 3-7% of alkyl amine polyoxyethylene ether bisquaternary ammonium salt, 3-6% of fatty alcohol polyoxyethylene ether, 5-9% of sodium chloride, 9-21% of ethanol, and the balance of water. The high-efficiency corrosion inhibiting bactericide for oilfield water flooding has the advantages of bactericidal property, low freezing point, small dosage, non-toxicity, no phosphorus and environmental friendliness; the corrosion inhibition rate of the high-efficiency corrosion inhibiting bactericide to Q235 steel at a temperature of below 55 DEG C is higher than required 70%, so the high-efficiency corrosion inhibiting bactericide can achieve uniform corrosion; and the bactericidal performance also can meet the requirements of oilfield water flooding index, so the high-efficiency corrosion inhibiting bactericide can meet the requirements of oilfield water flooding for the anticorrosion performance of pipelines and devices in the field of oilfield production.

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 Applications(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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