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Surfactant for oil displacement, synthetic method and application of surfactant in oil displacement system

A surfactant and synthesis method technology, applied in chemical instruments and methods, preparation of organic compounds, mining fluids, etc., can solve the problems of low micelle concentration, temperature resistance, low cloud point, low solubilization ability, etc., to achieve High micelle concentration, high conversion rate, and good water solubility

Pending Publication Date: 2022-07-15
大庆湃瑞环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Surfactants for oil displacement in the prior art have the disadvantages of temperature resistance, low cloud point, low concentration of micelles, and low solubilization ability, and the recovery factor needs to be further improved

Method used

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  • Surfactant for oil displacement, synthetic method and application of surfactant in oil displacement system
  • Surfactant for oil displacement, synthetic method and application of surfactant in oil displacement system
  • Surfactant for oil displacement, synthetic method and application of surfactant in oil displacement system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The synthetic method, performance detection and oil displacement performance test of the sodium oleic acid polyvinyl polyamide polyoxypropylene ether carboxylate non-anion mixed surfactant described in this embodiment are as follows:

[0062] 1. Synthesis method

[0063] Use oleic acid and polyvinylpolyamine acylation reaction to synthesize acylate intermediate, the reaction formula is:

[0064]

[0065] In the formula, n is an integer between 5-7;

[0066] (1) In a 1000ml four-necked reaction flask equipped with a condenser, a water separator, a stirrer and a thermometer, add 169g of oleic acid, 263g of polyvinylpolyamine, 160g of xylene with water agent, and after sealing, heat up and carry out acylation Reaction, after the temperature is higher than 150 °C, the water produced by the acylation reaction of xylene with water agent is azeotropically distilled, and after condensation, the water is separated into the measuring tube, and the xylene is distilled back int...

Embodiment 2

[0089] The synthetic method, performance detection and oil displacement performance test of the sodium naphthenic acid polyvinyl polyamide polyoxypropylene ether carboxylate non-anion mixed surfactant described in this embodiment are as follows:

[0090] 1. Synthesis method:

[0091] 1. The acylation reaction of naphthenic acid and polyvinylpolyamine to synthesize acylate intermediate, the reaction formula is:

[0092]

[0093] In the formula, R 0 for CH 3 base or C 2 H 5 ; n is an integer between 1-5; m is an integer between 1-3; k is an integer between 5-7;

[0094] In a 1000ml four-necked reaction flask equipped with a condenser, a water separator, a stirring paddle and a thermometer, add 175g of naphthenic acid with a crude acid value of 160mgKOH / g, 219.5g of polyethylene polyamine, and 160g of xylene, and stir slowly. The acylation reaction is carried out by heating up, when T 反 After >150°C, the water produced in the reaction is carried out by azeotropic distill...

Embodiment 3

[0117] The synthesis method, performance detection and oil displacement performance experiment of the palmitic acid polyvinyl polyamide polyoxypropylene ether carboxylate sodium non-anion mixed surfactant of the present application are as follows.

[0118] 1. Synthesis method

[0119] 1. Acylation reaction of palmitic acid (carbon hexadecanoic acid) and polyvinylpolyamine to synthesize an acylate intermediate. The reaction formula is:

[0120]

[0121] In the formula, n is an integer between 5-7;

[0122] (1) In a 1000ml four-necked flask equipped with a condenser, a water separator, a stirrer and a thermometer, add 128.0g of palmitic acid, and control the temperature to be 60°C. After the material is fully dissolved, add 219.5g of polyethylene polyamine, and two Toluene 140g, fully stirred and homogenized after the instrument is sealed, and heated to 150 °C to enter the acylation reaction; the water generated in the reaction is taken out by the azeotropic distillation of ...

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Abstract

The invention belongs to the technical field of chemical oil displacement for improving the crude oil recovery rate, and particularly relates to a surfactant for oil displacement, a synthesis method of the surfactant and application of the surfactant in an oil displacement system. The nonionic-to-anionic surfactant is synthesized through acylation reaction, etherification reaction and carboxylation reaction. The molecular structure of the surfactant is scientific and reasonable in design, the lipophilic group is aliphatic hydrocarbon or cycloalkane and is connected with the hydrophilic group and the carboxyl group through an amido polyoxypropylene ether chain, and the balance of the lipophilic capacity and the hydrophilic capacity is adjustable. The non-anionic mixed surfactant is excellent in performance, and can exert good interfacial activity and excellent synergistic effect when being independently used in tertiary oil recovery or being compounded with nonionic, anionic and zwitterionic surfactants.

Description

technical field [0001] The invention belongs to the technical field of chemical flooding for improving crude oil recovery, and in particular relates to a surfactant for oil displacement, a synthesis method and its application in an oil displacement system. Background technique [0002] After the oilfield enters the high water-cut oil recovery period, the remaining residual oil saturation is still about 50%, and the remaining oil is mostly dispersed and adhered to the sandstone or pore throats in the form of oil droplets and oil films. The conventional water flooding oil recovery method will only make the oil displacement efficiency lower and lower. After the tertiary oil recovery technology is carried out, polymer flooding is mostly used, the viscoelasticity of the polymer is used to increase the viscosity of the injected water, and the swept coefficient of water flooding can be expanded to increase the recovery factor after water flooding by about 6-8%. Daqing Oilfield and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C233/38C07C233/36C07C233/37C07C231/12C09K8/584C09K8/588E21B43/22
CPCC07C233/38C07C233/36C07C233/37C09K8/584C09K8/588E21B43/16
Inventor 顾剑峰薛天平汪旭杨丽
Owner 大庆湃瑞环保科技有限公司
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