Efficient corrosion inhibitor for resisting carbon dioxide corrosion and preparation method thereof

A carbon dioxide and corrosion inhibitor technology, which is applied in the field of high-efficiency corrosion inhibitors for anti-carbon dioxide corrosion and its preparation, can solve problems such as being easily absorbed by rock formations, unsatisfactory anti-corrosion effects, and short validity periods, and achieve good compatibility and improved corrosion resistance. Corrosion inhibition effect, the effect of corrosion inhibition effect enhancement

Pending Publication Date: 2021-04-30
TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a high-efficiency corrosion inhibitor for anti-carbon dioxide corrosion and its preparation method, which solves the problems of short validity period of imidazoline corrosion inhibitors in the process of carbon dioxide huffing and puffing, and easy to be destroyed in the formation. Rock stratum adsorption failure, anti-corrosion effect is not ideal

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  • Efficient corrosion inhibitor for resisting carbon dioxide corrosion and preparation method thereof
  • Efficient corrosion inhibitor for resisting carbon dioxide corrosion and preparation method thereof
  • Efficient corrosion inhibitor for resisting carbon dioxide corrosion and preparation method thereof

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Effect test

Embodiment 1

[0028] A kind of preparation method of high-efficiency corrosion inhibitor for carbon dioxide corrosion resistance is:

[0029] Step 1: Prepare solid polyaspartic acid into a solution with a mass concentration of 0.1%. The specific method is: put 300mL tap water in a 500mL beaker, turn on the stirring device, and make the water surface form a vortex. g of solid polyaspartic acid powder was evenly added to the vortex, and the stirring was continued for 1.5 hours to form a uniform liquid.

[0030] Step 2: Prepare the solid oxygen scavenger N,N,N',N'-tetrasubstituted phenylenediamine into a solution with a mass concentration of 80mg / L. The specific method is: put 500mL of tap water in a 1000mL beaker and place it under a magnetic force On the stirrer, add 0.04g of solid oxygen scavenger evenly into the beaker at a speed of 400r / min, stir for 20min to completely dissolve and form a uniform liquid. Take out 100 g of the homogeneous liquid, add 70 g of liquid oxygen scavenger N-iso...

Embodiment 2

[0041]A kind of preparation method of high-efficiency corrosion inhibitor for carbon dioxide corrosion resistance is:

[0042] Step 1: Prepare solid polyaspartic acid into a solution with a mass concentration of 0.15%. The specific method is: put 300mL tap water into a 500mL beaker, turn on the stirring device, and make the water surface form a vortex. g solid polyaspartic acid powder was evenly added to the vortex, and continued to stir for 2 hours to form a uniform liquid.

[0043] Step 2: Prepare the solid oxygen scavenger N,N,N',N'-tetrasubstituted phenylenediamine into a solution with a mass concentration of 90mg / L. On the stirrer, add 0.045g of solid oxygen scavenger evenly into the beaker at a speed of 400r / min, stir for 20min to completely dissolve and form a uniform liquid. Take out 100 g of the homogeneous liquid, add 70 g of liquid oxygen scavenger N-isopropylhydroxylamine and mix uniformly to obtain an oxygen scavenger mixture.

[0044] Step 3: Add 100g of 0.15% ...

Embodiment 3

[0054] A kind of preparation method of high-efficiency corrosion inhibitor for carbon dioxide corrosion resistance is:

[0055] Step 1: Prepare solid polyaspartic acid into a solution with a mass concentration of 0.2%. The specific method is: put 300mL tap water in a 500mL beaker, turn on the stirring device, and make the water surface form a vortex. g solid polyaspartic acid powder was evenly added to the vortex, and continued to stir for 2 hours to form a uniform liquid.

[0056] Step 2: Prepare the solid oxygen scavenger N,N,N',N'-tetrasubstituted phenylenediamine into a solution with a mass concentration of 100mg / L. The specific method is: put 500mL tap water in a 1000mL beaker, place it On the stirrer, add 0.05g of solid oxygen scavenger evenly into the beaker at a speed of 400r / min, stir for 30min to completely dissolve and form a uniform liquid. Take out 100 g of the homogeneous liquid, add 70 g of liquid oxygen scavenger N-isopropylhydroxylamine and mix uniformly to o...

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Abstract

The invention provides an efficient corrosion inhibitor for resisting carbon dioxide corrosion and a preparation method thereof, and relates to the field of chemical agents for tertiary oil recovery. According to the efficient corrosion inhibitor for resisting the carbon dioxide corrosion and the preparation method thereof, the synthesis of a novel imidazoline amide salt is taken as a starting point, and on the basis, the novel imidazoline amide salt is compounded with other environment-friendly water treatment agents to form an efficient corrosion inhibition system. The synthesis method of the imidazoline amide salt corrosion inhibitor comprises the following two steps: step 1, uniformly mixing lauric acid and diethylenetriamine according to a certain molar ratio, adding a water carrying agent xylene, carrying out high-temperature dehydration and cyclization reactions under condensation and nitrogen introduction conditions to obtain triimidazoline; and step 2, adding a proper amount of benzoic acid into the obtained triimidazoline, and carrying out high-temperature dehydration amidation reaction to obtain the imidazoline amide salt. The corrosion inhibition rate of various high-temperature and high-pressure oil well pipelines can be greatly improved, so as to achieve the purpose of improving quality and efficiency.

Description

technical field [0001] The invention relates to the technical field of chemicals for tertiary oil recovery, in particular to a high-efficiency corrosion inhibitor for carbon dioxide corrosion resistance and a preparation method thereof. Background technique [0002] At present, the oilfields generally use CO 2 Huff and puff technology enhances oil recovery, CO 2 When dissolved in formation water or injected into water, it will form carbonic acid, which is highly corrosive to oil and gas production and transportation pipelines and equipment, and seriously threatens the safety and health of the petrochemical industry. while mitigating CO 2 The most common solution to corrosion problems is the addition of corrosion inhibitors. At present, imidazoline corrosion inhibitors are the most widely used, but these corrosion inhibitors have strong selectivity to the use environment, a single reagent cannot have good anti-corrosion performance at the same time, and there are incompati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/02
CPCC23F11/02
Inventor 周传臣周华兴王晓燕王志宏程海鹰石昀韩英波郭立伟周建文李慧甄巧玲葛红江张杰庄永涛贾云霞
Owner TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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