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A kind of preparation method of demulsifier suitable for ASP flooding crude oil

A crude oil demulsifier and ternary composite technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as oil-water separation difficulties, crude oil extraction, transportation, processing, storage obstacles, etc., to achieve strong demulsification effect , Increase the speed of coalescence and accelerate the effect of oil-water separation

Active Publication Date: 2022-07-15
大庆高新区元吉化工有限公司
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  • Description
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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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  • A kind of preparation method of demulsifier suitable for ASP flooding crude oil
  • A kind of preparation method of demulsifier suitable for ASP flooding crude oil
  • A kind of preparation method of demulsifier suitable for ASP flooding crude oil

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preparation example Construction

[0017] The invention relates to a preparation method of a demulsifier suitable for ternary composite flooding of crude oil. The general formula of the demulsifier is as follows:

[0018]

[0019] in:

[0020] The preparation method comprises the following steps:

[0021] In the first step, the quantitative perfluorobutanamide and the catalyst potassium hydroxide are put into the autoclave and sealed, and the amount of potassium hydroxide is 0.2% to 0.4% of the total mass of the perfluorobutanamide, and the air in the kettle is replaced by nitrogen purging. , use a vacuum pump to evacuate to a gauge pressure of -0.086MPa, heat the autoclave 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 closed; when the reactants are ...

Embodiment approach

[0024] In the first step, the catalyst of the reaction is potassium hydroxide, and the potassium hydroxide consumption is 0.3% of the perfluorobutanamide quality;

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

[0026] In the first step, the reaction temperature in the autoclave is 140°C, and the reading of the pressure gauge of the autoclave 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 modification agent is added dropwise; the temperature of the third oil bath is 110℃, 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 quality of the intermediate product A of quantitative M;

[0029] In the se...

Embodiment 1

[0034] In the first step, 100g perfluorobutanamide and 0.3g potassium hydroxide are put into the autoclave and sealed, and the air in the autoclave is replaced by nitrogen purging, and the autoclave is evacuated to gauge pressure-0.086MPa with a vacuum pump , heat the autoclave to 140°C, open the feed valve, slowly add 170g of ethylene oxide, and control the pressure of the autoclave to be between 0.19MPa and 0.21MPa. Feed valve; until the reactant is fully reacted, the reaction ends until the reaction kettle drops to -0.086MPa in gauge pressure, and intermediate product A is obtained;

[0035] In the second step, 180g of the intermediate product A obtained through the first step was added to the three-point flask, and the temperature was raised to 70° C. using an oil bath with continuous stirring. 0.2g of potassium hydroxide was added to the three-point flask, and the oil bath was continued. The temperature was raised to 90°C, and 0.36 g of benzyl chloride was slowly added dr...

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Abstract

A preparation method of a demulsifier suitable for ternary composite flooding crude oil. It includes the following steps: put quantitative perfluorobutanamide and catalyst potassium hydroxide into a high pressure reaction kettle and seal it, use nitrogen to purge and replace the air in the reaction kettle, use a vacuum pump to evacuate the reaction kettle, and heat it up to 135 ℃ ~ 145 ℃ to Wherein, ethylene oxide is introduced into the polymerization reaction to generate intermediate product A; the intermediate product A is put into a three-pointer flask, the oil bath is heated to 60 ℃ ~ 80 ℃, then the catalyst potassium hydroxide is added, and the oil bath is heated to 80 ℃ ~ 100 ℃ Then, benzyl chloride was slowly added dropwise for 2h to 3h. After the dropwise addition, the temperature of the oil bath was raised to 110°C.

Description

Technical field: [0001] The invention relates to a preparation method of oilfield chemicals, in particular to a preparation method of a demulsifier suitable for ternary composite flooding of crude oil. Background technique: [0002] In recent years, the oilfield has entered the late stage of high water cut, and many oilfields have adopted the ASP flooding technology. Although the ASP flooding technology can improve oil recovery, due to the synergistic effect and emulsification in the oil displacement process, the problem of emulsification of produced fluid is very serious, so that most crude oil is recovered in the form of emulsion, and oil and water are separated. It is more difficult, which brings great obstacles to the extraction, transportation, processing and storage of crude oil. Therefore, it is necessary to study the special demulsifier for chemical demulsification and dehydration of produced fluid in ASP flooding. [0003] A large number of studies have shown that...

Claims

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Application Information

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Patent Type & Authority Patents(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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