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Preparation method of crude oil demulsifier applicable to ASP flooding

A crude oil demulsifier and ternary composite technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of crude oil extraction, transportation, processing, storage obstacles, oil-water separation difficulties, etc.

Active Publication Date: 2020-06-19
大庆高新区元吉化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the ASP flooding recovery technology can increase the recovery rate, due to the synergy and emulsification in the oil displacement process, the emulsification of the produced fluid is very serious, so that most of the crude oil is extracted in the form of emulsion, and the oil and water are separated. It is relatively difficult, which brings great obstacles to the extraction, transportation, processing and storage of crude oil

Method used

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  • Preparation method of crude oil demulsifier applicable to ASP flooding
  • Preparation method of crude oil demulsifier applicable to ASP flooding
  • Preparation method of crude oil demulsifier applicable to ASP flooding

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preparation example Construction

[0017] The present invention relates to a kind of preparation method that is suitable for the crude oil demulsifier of ASP flooding, and the structural general formula of described demulsifier is as follows:

[0018]

[0019] in:

[0020] Described preparation method comprises the steps:

[0021] In the first step, put quantitative perfluorobutyramide and catalyst potassium hydroxide into the high-pressure reaction kettle to seal, the amount of potassium hydroxide is 0.2% to 0.4% of the total mass of perfluorobutanamide, and use nitrogen purging to replace the air in the kettle , use a vacuum pump to evacuate to gauge pressure -0.086MPa, heat the high-pressure reactor to 140°C, open the feed valve, slowly add ethylene oxide, and feed the mass ratio of ethylene oxide to perfluorobutanamide The range is between 1.7:1 and 5.0:1, and the pressure of the reactor is controlled between 0.19MPa and 0.21MPa. After the addition of ethylene oxide is completed, the feed valve is clo...

Embodiment approach

[0024] In the first step, the catalyst for the reaction is potassium hydroxide, and the amount of potassium hydroxide is 0.3% of the mass of perfluorobutyramide;

[0025] In the first step, the mass ratio of ethylene oxide to perfluorobutyramide ranges from 1.7:1 to 5.0:1.

[0026] In the first step, the reaction temperature in the high-pressure reactor is 140°C, and the pressure gauge reading of the reactor is between 0.2±0.01Mpa during the reaction;

[0027] In the second step, the temperature of the first oil bath is 70°C, and stirring is required for 15-25 minutes after adding potassium hydroxide; the temperature of the second oil bath is 90°C, and the modifier is added dropwise; the temperature of the third oil bath is 110℃, the holding time is 8h;

[0028] In the second step, the catalyst of the reaction is potassium hydroxide, and the potassium hydroxide consumption is 0.12% of the intermediate product A quality of quantitative M;

[0029] In the second step, the modi...

Embodiment 1

[0034] In the first step, put 100g of perfluorobutyramide and 0.3g of potassium hydroxide into the autoclave to seal it, use nitrogen purge to replace the air in the autoclave, and use a vacuum pump to evacuate the autoclave to a gauge pressure of -0.086MPa , heat the high-pressure reactor to 140°C, open the feed valve, slowly add 170g of ethylene oxide, control the pressure of the reactor between 0.19MPa and 0.21MPa, and close the inlet valve after the addition of ethylene oxide is completed. Feed valve; after the reactants are fully reacted, the reaction ends when the reaction kettle drops to gauge pressure -0.086MPa, and the intermediate product A is obtained;

[0035] In the second step, take 180g of the intermediate product A obtained through the first step and add it to a three-part bottle, continue to stir and use an oil bath to raise the temperature to 70°C, add 0.2g of potassium hydroxide to the three-part bottle, and continue the oil bath Raise the temperature to 90°...

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Abstract

The invention discloses a preparation method of a crude oil demulsifier applicable to ASP flooding. The preparation method comprises the following steps: putting a certain amount of perfluorobutyramide and a catalyst, namely potassium hydroxide into a high-pressure reaction kettle, sealing the high-pressure reaction kettle, carrying out purging with nitrogen to displace air in the reaction kettle,vacuumizing the reaction kettle with a vacuum pump, carrying out heating to 135-145 DEG C, and introducing ethylene oxide into the reaction kettle to perform a polymerization reaction so as to generate an intermediate product A; and putting the intermediate product A into a trisection bottle, carrying out heating to 60-80 DEG C in an oil bath, adding the catalyst potassium hydroxide, carrying outheating to 80-100 DEG C in the oil bath, then slowly and dropwise adding benzyl chloride within 2-3 hours, carrying out heating to 110 DEG C in the oil bath after dropwise addition, and carrying outa heat-preserved reaction for 8 hours to obtain the crude oil demulsifier applicable to ASP flooding.

Description

Technical field: [0001] The invention relates to a preparation method of oil field chemicals, in particular to a preparation method of a crude oil demulsifier suitable for three-element compound flooding. Background technique: [0002] In recent years, oil fields have entered the late stage of high water cut, and many oil fields have adopted ASP flooding technology. Although the ASP flooding recovery technology can increase the recovery rate, due to the synergy and emulsification in the oil displacement process, the emulsification of the produced fluid is very serious, so that most of the crude oil is extracted in the form of emulsion, and the oil and water are separated. It is relatively difficult, which brings great obstacles to the exploitation, transportation, processing and storage of crude oil. Therefore, it is necessary to study special demulsifiers for chemical demulsification and dehydration of ASP flooding production fluid. [0003] A large number of studies have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26C09K8/584
CPCC08G65/2633C08G65/2648C09K8/584
Inventor 魏立新宋洋李哲卢梦媚刘扬代轩瑞叶霖贾新磊
Owner 大庆高新区元吉化工有限公司
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