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Compound ultralow interfacial tension surfactant and preparation method thereof

A surfactant and interfacial tension technology, applied in chemical instruments and methods, drilling compositions, etc., to achieve good compatibility, fast dissolution, and strong anti-mineralization ability

Active Publication Date: 2022-01-18
扬州润达油田化学剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are many studies on fluorine-containing gemini surfactants, but there are few practical application groups in oil field development

Method used

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  • Compound ultralow interfacial tension surfactant and preparation method thereof
  • Compound ultralow interfacial tension surfactant and preparation method thereof
  • Compound ultralow interfacial tension surfactant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] First, add 72Kg of water into the reaction kettle, raise the temperature to 50°C, turn on the stirring, keep the stirring speed at 100-200rpm, add 15kg of α-alkenyl sulfonate, 1kg of Pingpingjia O-20, 6kg of cetyl di Methyl hydroxypropyl sultaine and 6kg of octadecyl dimethyl hydroxypropyl sultaine were stirred uniformly and then cooled to 30°C to obtain an ultra-low interfacial tension surfactant.

Embodiment 2

[0032] First, add 71.8Kg of water into the reactor, raise the temperature to 50°C, turn on the stirring, keep the stirring speed at 100-200rpm, add 0.2kg of fluorine-containing gemini surfactant, 15kg of α-alkenyl sulfonate, 1kg of O-20, 6kg cetyl dimethyl hydroxypropyl sulfobetaine and 6kg octadecyl dimethyl hydroxypropyl sulfobetaine, stir evenly and cool down to 30°C to obtain ultra-low interfacial tension Surfactant.

Embodiment 3

[0034] First, add 68.8Kg of water into the reactor, raise the temperature to 50°C, turn on the stirring, keep the stirring speed at 100-200rpm, add 0.2kg of fluorine-containing gemini surfactant, 20kg of α-alkenyl sulfonate, 3kg of O-20, 1kg cetyl dimethyl hydroxypropyl sultaine and 7kg octadecyl dimethyl hydroxypropyl sultaine, stir evenly and cool down to 30°C to obtain ultra-low interfacial tension surfactant.

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Abstract

The invention discloses a compound ultralow interfacial tension surfactant.The surfactant is prepared from the following raw materials in percentage by weight: 0.1 to 2 percent of fluorine-containing gemini surfactant, 10 to 30 percent of alpha-alkenyl sulfonate, 1 to 5 percent of peregal O-20, 10 to 20 percent of hexadecyl / octadecyl betaine and the balance of water. The ultralow interfacial tension surfactant is soluble with water, the dissolving speed is high, the salinity resistance is high, and the surface tension of water can be reduced from 73.4 mN * m <-1 > to 15.3 mN * m <-1 > as long as 0.1% of the surfactant is used; the interfacial tension of crude oil and water is reduced to 0.008 mN. M <-1 > or below, and ultralow interfacial tension is achieved; and the ultralow interfacial tension surfactant is neutral, has good compatibility with medicaments such as a bactericide and a flocculating agent, and causes no corrosion to equipment and pipelines.

Description

technical field [0001] The invention relates to the technical field of surfactants, in particular to a compounded ultra-low interfacial tension surfactant and a preparation method thereof. Background technique [0002] With the development of oil fields, water flooding has become very difficult to recover oil. Due to the low recovery rate of water flooding, the use of chemical flooding to enhance oil recovery has become the main research direction of oil field development. Surfactant flooding in chemical flooding is more favored by people, and has great application prospects in the application of tertiary oil recovery in oilfields. [0003] Gemini surfactant is a new type of surfactant, its molecule contains at least 2 hydrophilic groups and 2 hydrophobic groups, at or close to the hydrophilic group, it is linked together by a linking group through chemical bonds. Hydrophilic groups can be cations, anions, zwitterions or polar groups; there are many types of linking groups,...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 胡敬徐程王凯健郭礼荣
Owner 扬州润达油田化学剂有限公司
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