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Preparation method of ASP flooding crude oil demulsifier

A crude oil demulsifier and ternary composite technology, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of difficult dehydration of heavy oil, and achieve significant demulsification effect, high efficiency and good demulsification effect.

Inactive Publication Date: 2020-10-16
BINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of ASP flooding crude oil demulsifier to solve the technical problem of heavy oil dehydration difficulty in the prior art

Method used

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

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] (1) Synthesis of initiator A: Weigh 20g of p-tert-butylphenol and 39g of triethylenetetramine into a four-neck flask, mix and stir, heat to 55°C to completely dissolve, and slowly add 20g dropwise at 50°C to a concentration of 40 % formaldehyde solution, keep warm for 35min, add 39g of xylene solution, then heat to 110°C for reflux dehydration for 2.5h, then raise the temperature to 190°C to recover xylene, and wait for the remaining substances to fully react for 2h to generate initiator A. Its specific reaction formula is as follows:

[0034]

[0035] (2) Synthesis of intermediate product B: Weigh 5g of starter A and 2.12g of potassium hydroxide and put them into the reaction kettle to seal, use nitrogen purge to replace the air in the kettle, and use a vacuum pump to evacuate to negative pressure. This implementation In the example, after evacuating to a pressure of -0.09MPa, raise the temperature to 110°C, open the feed valve and slowly add 795g of propylene oxide...

Embodiment 2

[0045] A preparation method of a three-element compound flooding crude oil demulsifier, which comprises the following steps:

[0046] (1) Synthesis of initiator A: Weigh 20g of p-tert-butylphenol and 40g of triethylenetetramine into a four-neck flask, mix and stir, heat to 55°C to completely dissolve, and slowly add 21g dropwise at 50°C to a concentration of 38 % formaldehyde solution, keep warm for 40min, add 41g of xylene solution, then heat to 110°C for reflux dehydration for 2h, then raise the temperature to 190°C to recover xylene, and wait for the remaining substances to fully react for 2h to generate initiator A. Its specific reaction formula is shown in the first step (1) of the embodiment.

[0047] (2) Synthesis of intermediate product B: Weigh 5g of starter A and 2.12g of potassium hydroxide and put them into the reaction kettle to seal, use nitrogen purge to replace the air in the kettle, and use a vacuum pump to evacuate to negative pressure. This implementation I...

Embodiment 3

[0051] A preparation method of a three-element compound flooding crude oil demulsifier, which comprises the following steps:

[0052] (1) Synthesis of initiator A: Weigh 20g of p-tert-butylphenol and 38g of triethylenetetramine into a four-neck flask, mix and stir, heat to 55°C to dissolve completely, and slowly add 21g dropwise at 50°C to a concentration of 38 % formaldehyde solution, keep warm for 30min, add 39g xylene solution, then heat to 110°C for reflux dehydration for 2h, then raise the temperature to 190°C to recover xylene, and wait for the remaining substances to fully react for 2h to generate initiator A. Its specific reaction formula is shown in the first step (1) of the embodiment.

[0053] (2) Synthesis of intermediate product B: Weigh 5g of starter A and 2.12g of potassium hydroxide and put them into the reaction kettle to seal, use nitrogen purge to replace the air in the kettle, and use a vacuum pump to evacuate to negative pressure. This implementation In t...

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Abstract

The invention discloses a preparation method of an ASP flooding crude oil demulsifier, which comprises the following steps: (1) mixing tert-butyl phenol and triethylene tetramine, heating until complete dissolution, and dropwisely adding a formaldehyde solution to generate an initiator A; (2) putting the initiator A and a catalyst into a reaction kettle, sealing, vacuumizing, introducing epoxypropane, heating, and controlling the pressure to obtain an intermediate product B; (3) putting the intermediate product B and a catalyst into a reaction kettle, sealing, vacuumizing, introducing epoxypropane, heating, and controlling the pressure to obtain polyether C; and (4) adding polyether C into the reaction container, dissolving polyether C, adding choline chloride, stirring, heating to 50-75 DEG C, completely dissolving, dropwise adding TDI, and finishing dropwise adding when the wire drawing length is 3-4cm, thereby obtaining the ASP flooding crude oil demulsifier. The demulsifier obtained by the process has good lipophilicity, can significantly improve the use efficiency of a chemical agent, and has high surface activity, high demulsification speed and good demulsification effect.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a preparation method of a three-element compound flooding crude oil demulsifier. Background technique [0002] With the deepening of tertiary oil recovery, oil production has gradually changed from conventional production to heavy oil, heavy oil and even super heavy oil. Therefore, crude oil development also puts forward higher requirements for commonly used crude oil demulsifiers. Crude oil demulsifier is an indispensable chemical reagent in the combined station and refinery. The addition of various oil displacement agents in the production process leads to a more stable state of the produced fluid. [0003] However, due to the increasing water content and the proportion of viscous oil in the production fluid of major oilfields, many conventional demulsifiers commonly used in the market can no longer meet the increasing demulsification requirements of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 耿孝恒郭海莹贾新磊毕康杰韩亚男杨仲年商希礼
Owner BINZHOU UNIV
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