Preparation method of polymer flooding produced fluid demulsifier

A technology of demulsifier and polymer, which is applied in the field of preparation of high-efficiency and fast polymer flooding production fluid demulsifier, which can solve the problem of low dehydration rate of polymer flooding production fluid, low demulsification speed of demulsifier, slow dehydration speed, etc. problem, to achieve high yield of demulsifier, reduce dehydration cost and high dehydration rate

Active Publication Date: 2014-03-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems of low dehydration rate and slow dehydration speed of polymer flooding production fluid in the prior art, and the low demulsification speed of existing demulsifiers, the prepar

Method used

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  • Preparation method of polymer flooding produced fluid demulsifier
  • Preparation method of polymer flooding produced fluid demulsifier
  • Preparation method of polymer flooding produced fluid demulsifier

Examples

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Embodiment 1

[0042] A preparation method for polymer flooding production fluid demulsifier, the steps are as follows:

[0043] (1) Synthesis of tetraphenol ethane type phenolic amine resin starter:

[0044] Add 76g of tetraethylenepentamine to a 250ml three-necked flask, raise the temperature to 120°C and add 40g of tetraphenolyl ethane with stirring, after stirring and dissolving completely, cool down to 37°C, add dropwise 80g of 38wt% formaldehyde solution at a rate of 5g / min, and react After 2 hours, add 70 g of xylene, then raise the temperature to 100° C., dehydration reaction for 4 hours, and remove the xylene by distillation under reduced pressure to obtain a tetraphenol ethane type phenolamine resin initiator;

[0045] (2) Synthesis of lipophilic head of demulsifier:

[0046] Take 10g of tetraphenol-based ethane type phenolamine resin starter obtained in step (1) and put 2g of potassium hydroxide into the autoclave, after sealing the autoclave, start stirring and raise the tempera...

Embodiment 2

[0050] A preparation method for polymer flooding production fluid demulsifier, the steps are as follows:

[0051] (1) Synthesis of tetraphenol ethane type phenolic amine resin starter:

[0052] Step is with embodiment 1;

[0053] (2) Synthesis of lipophilic head of demulsifier:

[0054]Take 10g of the tetraphenol-based ethane type phenolamine resin starter obtained in step (1) and put 2g of sodium hydroxide into the autoclave, after sealing the autoclave, start stirring and raise the temperature, exhaust nitrogen 3 times, wait until the temperature rises When it reaches 80°C, use a vacuum pump to evacuate the autoclave until it reaches -0.1MPa, and stop vacuuming after 30 minutes; when the temperature rises to 130°C, slowly add 690g of propylene oxide, keep the pressure at 0.4MPa, and react for 10h to prepare Demulsifier lipophilic head;

[0055] (3) Synthesis of demulsifier for polymer flooding production fluid:

[0056] Take 60g of the lipophilic head of the demulsifier ...

Embodiment 3

[0058] A preparation method for polymer flooding production fluid demulsifier, the steps are as follows:

[0059] (1) Synthesis of tetraphenol ethane type phenolic amine resin starter:

[0060] Step is with embodiment 1;

[0061] (2) Synthesis of lipophilic head of demulsifier:

[0062] Take 10g of the tetraphenol-based ethane type phenolamine resin starter obtained in step (1) and put 3g of potassium hydroxide into the autoclave, after sealing the autoclave, start stirring and raise the temperature, exhaust nitrogen gas 3 times, wait until the temperature rises When it reaches 80°C, use a vacuum pump to evacuate the autoclave until it reaches -0.1MPa, and stop vacuuming after 30 minutes; when the temperature rises to 120°C, slowly add 990g of propylene oxide, keep the pressure at 0.4MPa, and react for 10h to prepare Demulsifier lipophilic head;

[0063] (3) Synthesis of demulsifier for polymer flooding production fluid:

[0064] Take 60g of the lipophilic head of the demu...

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Abstract

The invention relates to a preparation method of a polymer flooding produced fluid demulsifier. The method comprises the following steps: by using multiramiform tetraphenol ethane catecholamine resin as an initiator, polymerizing with propylene oxide to obtain a demulsifier oleophylic head, and polymerizing the demulsifier oleophylic head with epoxyethane to obtain the multiramiform polyether demulsifier. The demulsifier can be used for efficiently and quickly demulsifying crude oil and especially thick oil. The method solves the problems of low dehydration rate, low dehydration speed and the like in the polymer flooding produced fluid in the prior art, satisfies the harsher requirements for time and dehydration rate of the demulsifier by the offshore platform, and can be used for demulsifying and dehydrating an offshore polymer flooding produced fluid.

Description

technical field [0001] The invention relates to a preparation method of an efficient and rapid polymer flooding production fluid demulsifier, which belongs to the technical field of petroleum processing. The prepared demulsifier is especially suitable for demulsification of oil field polymer flooding production fluid. Background technique [0002] As a relatively mature tertiary oil recovery technology, polymer flooding has entered the stage of industrial application in many oilfields at home and abroad, such as my country's Daqing, Shengli, Dagang, Henan and other oilfields have carried out field experiments. Since 1997, my country's polymer flooding has ranked first in the world in terms of oil increment, and the annual oil increment achieved through chemical flooding accounts for about 15% of the annual onshore production, making China the country with the highest degree of industrialization of tertiary oil recovery in the world. [0003] While polymer flooding greatly im...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G14/073C10G33/04
Inventor 谭业邦李仲伟殷硕赵士乐
Owner SHANDONG UNIV
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