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Demulsifying agent for treating natural gas condensate oil produced liquid as well as preparation method and application thereof

A technology of condensate oil and demulsifier, which is applied in the field of demulsifier for natural gas condensate oil production fluid treatment and its preparation, which can solve the problems of high dosage, difficulty in demulsification, poor pertinence of demulsifier, etc., and achieve good settlement , Large specific surface area, good detergency effect

Inactive Publication Date: 2020-11-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the present situation that the natural gas condensate oil production fluid containing suspended solids is seriously emulsified and difficult to demulsify (the demulsifier is poorly targeted and the dosage is high), the present invention provides a natural gas condensate oil production fluid treatment broken Emulsion and its preparation method and application. The present invention has the characteristics of fast demulsification speed and good demulsification effect (clear oil and clear water); the present invention not only flocculates suspended solids, but also has demulsification function to effectively condensate oil and water Separation, realize the complete separation of three phases of condensate oil-water-solid suspended matter, clean oil and water, and solve the problem of separation, recovery and reuse of condensate oil

Method used

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  • Demulsifying agent for treating natural gas condensate oil produced liquid as well as preparation method and application thereof
  • Demulsifying agent for treating natural gas condensate oil produced liquid as well as preparation method and application thereof
  • Demulsifying agent for treating natural gas condensate oil produced liquid as well as preparation method and application thereof

Examples

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Embodiment 1

[0053] A demulsifier for natural gas condensate production liquid treatment, comprising the following raw materials and a preparation method, specifically: (1) preparing raw materials, including the following components in mass percentages:

[0054] Methanol 20%, monomer 67%, initiator ammonium persulfate 3% and deionized water 10%;

[0055] Wherein, the monomer comprises acryloyloxyethyltrimethylammonium chloride, isooctyl acrylate and acrylamide mixed in a molar ratio of 1:1:1;

[0056] (2) preparation method, comprises the following steps:

[0057] Mix water and methanol evenly in proportion and add them into a closed three-necked bottle, then pass through argon gas to deoxygenate for 30 minutes, and then add three monomers acryloyloxyethyltrimethylammonium chloride, isooctyl acrylate and propylene Amide, the feeding ratio between the acryloyloxyethyltrimethylammonium chloride, isooctyl acrylate and acrylamide is 1:1:1, stir and heat up to 60°C, use a constant pressure dro...

Embodiment 2

[0059] A demulsifier for natural gas condensate production liquid treatment, comprising the following raw materials and a preparation method, specifically: (1) preparing raw materials, including the following components in mass percentages:

[0060] Methanol 18%, monomer 72%, initiator potassium persulfate 4% and deionized water 6%;

[0061] Wherein, the monomer comprises acryloyloxyethyltrimethylammonium chloride, isobutyl acrylate and acrylamide mixed in a molar ratio of 3:1:1;

[0062] (2) preparation method, comprises the following steps:

[0063] Mix water and methanol evenly in proportion and add them into a closed three-necked bottle, then pass through argon gas to deoxygenate for 30 minutes, and then add three monomers acryloyloxyethyltrimethylammonium chloride, isobutyl acrylate and propylene Amide, the feeding ratio between the acryloyloxyethyltrimethylammonium chloride, isobutyl acrylate and acrylamide is 3:1:1, stir and heat up to 60°C, use a constant pressure dro...

Embodiment 3

[0065] A demulsifier for natural gas condensate production liquid treatment, comprising the following raw materials and a preparation method, specifically: (1) preparing raw materials, including the following components in mass percentages:

[0066] Methanol 24%, monomer 68%, initiator potassium persulfate 4% and deionized water 4%;

[0067] Wherein, the monomer comprises acryloyloxyethyltrimethylammonium chloride, isobutyl acrylate and acrylamide mixed in a molar ratio of 1:2:1;

[0068] (2) preparation method, comprises the following steps:

[0069] Mix water and methanol evenly in proportion and add them into a closed three-neck bottle, then pass through argon gas to remove oxygen for 30 minutes, and then add three monomers acryloyloxyethyltrimethylammonium chloride, hydroxypropyl acrylate and propylene Amide, the feeding ratio between the acryloyloxyethyltrimethylammonium chloride, hydroxypropyl acrylate and acrylamide is 1:2:1, stir and heat up to 60°C, use a constant pr...

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Abstract

The invention provides a demulsifying agent for treating natural gas condensate oil produced liquid as well as a preparation method and application thereof. The demulsifying agent comprises the following components in percentage by mass: 15-30% of alcohol, 50-75% of a monomer, 0.5-6% of an initiator and the balance of water, wherein the monomer is formed by mixing cationic acryloyloxyethyl fatty ammonium salt, acrylate and acrylamide according to the molar ratio of (1-5): (1-5): 1. The demulsifying agent has good demulsification and flocculation effects, and is especially suitable for treatment of natural gas condensate oil produced liquid with clay suspended solids. According to the demulsifying agent, condensate oil and water can be effectively separated at room temperature, meanwhile, suspended solids in the condensate oil can be effectively flocculated, recycling of the condensate oil is achieved, the demulsifying agent has the advantages of high demulsification speed and clear demulsified oil water, the problem of separation, recycling and reusing of the condensate oil is solved, and the demulsifying agent can be widely applied to after-treatment of condensate oil produced liquid.

Description

technical field [0001] The invention relates to the field of demulsification of natural gas condensate oil production fluid, in particular to a demulsifier for processing natural gas condensate oil production fluid and its preparation method and application. Background technique [0002] At present, the foam drainage gas recovery technology has become the most economical and effective method to discharge fluid in the well, dredge the gas-water channel, improve the efficiency of natural gas recovery, and prolong the production cycle of the gas well due to the advantages of simple equipment, convenient construction, high efficiency and low cost. However, while this process is stabilizing and increasing production, a large amount of foaming agents (surfactant additives) will be added to the gas well during the implementation process, and the condensate oil will , solid mechanical impurities and gas field produced water form a complex and stable gas field produced water condensa...

Claims

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Application Information

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IPC IPC(8): C08F220/34C08F220/18C08F220/56C08F220/28C10G33/04
CPCC08F220/34C08F220/1808C08F220/56C08F220/1804C10G33/04C08F220/281
Inventor 张振云于淑珍李明星朱方辉李琼玮刘伟董晓焕李慧孙雨来谷成义
Owner PETROCHINA CO LTD
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