Reverse-phase emulsion breaker with polymer produced liquid and method for preparing reverse-phase emulsion breaker

A reverse-phase demulsifier and reaction technology, which is applied in the direction of dehydration/demulsification by chemical methods, can solve the problems of inapplicable reverse-phase demulsifier and achieve good demulsification effect

Inactive Publication Date: 2019-05-10
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defect that existing conventional reverse phase demulsifiers are not suitable for polymer flooding production fluid treatment, and to provide a new type of special polymer flooding production fluid reverse phase demulsifier and its preparation method. The present invention The reverse phase demulsifier provided is to first synthesize the starting group with benzene ring structure with bisphenol A, formaldehyde and organic amine, then carry out polymerization reaction with epichlorohydrin to form polyether structure, and finally use trimethylamine to complete the quaternary ammonium Chemical modification, to obtain a new polymer flooding production fluid inverse demulsifier with a certain degree of cation and polyether structure, which has good demulsification and water purification effects on oilfield polymer flooding production fluid

Method used

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  • Reverse-phase emulsion breaker with polymer produced liquid and method for preparing reverse-phase emulsion breaker
  • Reverse-phase emulsion breaker with polymer produced liquid and method for preparing reverse-phase emulsion breaker
  • Reverse-phase emulsion breaker with polymer produced liquid and method for preparing reverse-phase emulsion breaker

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: the synthesis of inverse demulsifier a

[0024] (1) Synthesis of multi-branched phenolamine resin

[0025] Stir and mix bisphenol A and diethylenetriamine evenly. After the two are dissolved at 60°C, slowly add formaldehyde dropwise. After the dropwise addition, continue to keep warm. The whole reaction time is 8h. The added amounts of bisphenol A, diethylenetriamine and formaldehyde were 22.8g, 36.1g and 26.3g respectively (the molar ratio of bisphenol A, diethylenetriamine and formaldehyde was 1:3.5:3.5).

[0026] (2) Polymerization reaction of phenolamine resin and epichlorohydrin

[0027] Add the phenolic amine resin and NaOH prepared in step (1) into the high-temperature and high-pressure reactor in sequence, heat up after sealing, and when the temperature is close to 120°C, slowly, continuously, and a small amount of epichlorohydrin are introduced to carry out the polymerization reaction, and the pressure of the reactor is It should be lower than 0...

Embodiment 2

[0030] Embodiment 2: the synthesis of inverse demulsifier b

[0031] (1) Synthesis of multi-branched phenolamine resin

[0032] Stir and mix bisphenol A and triethylenetetramine evenly. After the two are dissolved at 70°C, slowly add formaldehyde dropwise. After the dropwise addition, continue to keep warm. The whole reaction time is 6h. The addition amounts of bisphenol A, triethylenetetramine and formaldehyde were 22.8g, 58.5g and 30.0g respectively (the molar ratio of bisphenol A, triethylenetetramine and formaldehyde was 1:4.0:4.0).

[0033] (2) Polymerization reaction of phenolamine resin and epichlorohydrin

[0034] Add the phenolic amine resin and KOH prepared in step (1) into the high-temperature and high-pressure reactor in sequence, and heat up after sealing. When the temperature is close to 110°C, slowly, continuously, and a small amount of epichlorohydrin are introduced to carry out the polymerization reaction. The pressure of the reactor is It should be lower th...

Embodiment 3

[0037] Embodiment 3: the synthesis of inverse demulsifier c

[0038] (1) Synthesis of multi-branched phenolamine resin

[0039] Stir and mix bisphenol A and tetraethylenepentamine evenly. After the two are dissolved at 80°C, slowly add formaldehyde dropwise. After the dropwise addition, continue to keep warm. The whole reaction time is 4h. The added amounts of bisphenol A, tetraethylenepentamine and formaldehyde were 22.8g, 85.2g and 33.8g respectively (the molar ratio of bisphenol A, tetraethylenepentamine and formaldehyde was 1:4.5:4.5).

[0040] (2) Polymerization reaction of phenolamine resin and epichlorohydrin

[0041] The phenolamine resin prepared by step (1) and Na 2 CO 3 Sequentially add to the high-temperature and high-pressure reactor, and heat up after sealing. When the temperature is close to 100°C, slowly, continuously, and a small amount of epichlorohydrin is introduced to carry out the polymerization reaction. The pressure of the reactor should be lower tha...

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PUM

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Abstract

The invention relates to a reverse-phase emulsion breaker with polymer produced liquid and a method for preparing the reverse-phase emulsion breaker. The method includes steps of (1), carrying out Mannich reaction on bisphenol A, formaldehyde and organic amine to obtain multi-branched phenol-amine resin; (2), carrying out polymerization reaction on epichlorohydrin and the phenol-amine resin prepared at the step (1) to obtain polymers with polyether structures; (3), carrying out quaternization reaction on trimethylamine and the polymers prepared at the step (2) to obtain the reverse-phase emulsion breaker shown as a structural formula III. The reverse-phase emulsion breaker and the method have the advantage that excellent emulsion breaking and water purifying effects can be realized by thereverse-phase emulsion breaker for oilfield polymer flooding produced liquid.

Description

Technical field: [0001] The invention belongs to the technical field of crude oil production, especially heavy oil polymer flooding production, and more specifically relates to a polymer-containing production fluid reverse-phase demulsifier and a preparation method thereof. Background technique: [0002] At present, many domestic oilfields have entered the stage of full-scale polymer injection, and the properties of polymer flooding fluids are quite different from those of water flooding fluids. For the polymer flooding produced fluid, the residual polymer is distributed in the water phase and the oil-water interface, which enhances the stability of the oil-water emulsion, which leads to many problems in the treatment of the polymer flooding produced fluid by conventional inverse demulsifiers, mainly manifested in the addition of agents If the amount is large, the dehydration rate will slow down during demulsification, and the dehydration rate will decrease, and the oil cont...

Claims

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Application Information

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IPC IPC(8): C08G59/14C08G59/10C08G14/073C10G33/04
Inventor 刘义刚丁秋炜韩玉贵王素芳肖丽华靳晓霞宋鑫徐俊英苑玉静赵鹏
Owner CHINA NAT OFFSHORE OIL CORP
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