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A kind of anionic nonionic surfactant heavy oil viscosity reducing oil displacement agent and its preparation method and application

A surfactant, anionic and nonionic technology, applied in the field of oil displacement agents, can solve the problems of low interfacial tension and emulsification viscosity reduction effect, residual organic chlorine, affecting crude oil refining, etc., and achieves good emulsification viscosity reduction effect and interfacial tension. low value effect

Active Publication Date: 2021-02-26
DONGYING BAOMO ENVIRONMENT ENG CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Sodium fatty alcohol polyoxyethylene ether carboxylate and sodium fatty alcohol polyoxyethylene ether sulfonate have lower interfacial tension and emulsifying viscosity-reducing effects, but need to use organic chlorine raw materials (sodium chloroacetate, thionyl chloride) in the production process , phosphorus trichloride), there will be residual organic chlorine in the final product, and the residual organic chlorine will affect the later stage of crude oil refining

Method used

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  • A kind of anionic nonionic surfactant heavy oil viscosity reducing oil displacement agent and its preparation method and application
  • A kind of anionic nonionic surfactant heavy oil viscosity reducing oil displacement agent and its preparation method and application
  • A kind of anionic nonionic surfactant heavy oil viscosity reducing oil displacement agent and its preparation method and application

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preparation example Construction

[0020] The preparation method of above-mentioned anionic nonionic surfactant heavy oil viscosity reducing oil displacement agent, comprises the following steps:

[0021] (a) Carry out Michael addition reaction of long-chain polyetheramine and methyl acrylate in a solvent at a molar ratio of 1:1 to 2 for 5-12 hours, the amount of solvent used is 20wt% of the total amount of reactants, and the solvent is methanol, ethanol, One or more of isopropanol, water,

[0022] (b) The product of the addition reaction is hydrolyzed for 5-12h in a sodium hydroxide solution with a mass fraction of 20-40%. The mol ratio of the product to sodium hydroxide is 1:1~2, and then V / V= Adjust the pH to 6.0-7.0 with 1:1 dilute sulfuric acid, add water to a solid content of 35%, and obtain a viscous oil displacement agent for heavy oil.

[0023] Among them, R is H 3 C-(CH 2 )y-, Or a mixture of the two, y=8-15; the value range of m is 0-10, the value range of n is 0-10, and the value range of x...

Embodiment 1

[0025] Add 20wt% of methanol in the three-necked flask, and add lauryl alcohol polyoxyethylene ether amine (4EO) and methyl acrylate at a molar ratio of 1:1, deoxygenate with nitrogen for 10 minutes, and start heating to 50°C. Addition reaction 5h;

[0026] The product of the addition reaction was hydrolyzed for 5 h in a sodium hydroxide solution with a mass fraction of 30%, the molar ratio of the product to sodium hydroxide was 1:1, and then the pH was adjusted to 6.5, add water to a solid content of 35%, and obtain a viscous oil displacement agent for heavy oil.

Embodiment 2

[0028] Add 20wt% ethanol accounting for the total amount of reactants in a three-necked flask, add nonylphenol polyvinyl ether amine (4EO) and methyl acrylate at a molar ratio of 1:2, blow nitrogen to remove oxygen for 10 minutes, and start heating to 50°C. Addition reaction 8h;

[0029] The product of the addition reaction was hydrolyzed for 10 h in a sodium hydroxide solution with a mass fraction of 35%, and the molar ratio of the product to sodium hydroxide was 1:1.5, and then the pH was adjusted to 7. Supplement water to a solid content of 35% to obtain a heavy oil viscosity reducing oil displacement agent.

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Abstract

The invention relates to an anionic and nonionic surfactant heavy oil viscosity-reducing oil-displacing agent, a preparation method and application thereof. Reaction 5-12h, then the product of the addition reaction is subjected to hydrolysis reaction 5-12h in alkaline solution, then the dilute sulfuric acid of V / V=1:1 is used to adjust pH to 6.0-7.0, and water is added to a solid content of 35%, A viscosity-reducing oil-displacing agent for heavy oil is obtained. The viscosity-reducing and oil-displacing agent for heavy oil of the invention has low interfacial tension value, good emulsification and viscosity-reducing effect, emulsified crude oil can be automatically demulsified, and the dehydration rate is over 80%.

Description

technical field [0001] The invention belongs to the field of oil-displacement agents, and in particular relates to an anion-nonionic surfactant viscous-reducing oil-displacement agent for heavy oil, a preparation method and application thereof. Background technique [0002] With the development of oil fields, the recovery of heavy oil becomes more and more important. Heavy oil contains more colloids and asphaltenes, has a high viscosity and poor fluidity, which brings many inconveniences to mining, such as pump lag, polished rods cannot be lowered, pumping unit load increases, pumping is difficult, and back pressure increases and easy blockage of pipelines, the recovery factor of heavy oil blocks is also low. Heavy oil development methods, technologies, processes, and management vary with specific situations. The chemical viscosity reduction method is a more economical, convenient and widely used mining method. In the emulsification viscosity reduction, a water-soluble sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C227/18
CPCC07C227/08C07C227/18C09K8/584C07C229/12
Inventor 陈晓刚任建军马少云李岳军吕营波武红
Owner DONGYING BAOMO ENVIRONMENT ENG CO LTD
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