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Sulfosuccinate salt type oil displacement agent, synthesis method and application thereof in tertiary oil recovery field

A technology of sulfosuccinate and synthesis method, applied in the field of tertiary oil recovery, in the field of sulfosuccinate salt type oil displacement agent, can solve the problem of poor stability of compound system, easy change of chemical structure, and poor oil displacement efficiency and other problems, to achieve good emulsification, low price, good viscosity reduction and displacement effect

Inactive Publication Date: 2020-07-10
DONGYING BAOMO ENVIRONMENT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many surfactants that have been used in tertiary oil recovery are prone to stratification or precipitation in groundwater with high salinity and high calcium and magnesium ions. At the same time, the chemical structure is easy to change under high temperature conditions, and the stability of the compound system is poor. Severe chromatographic separation is prone to occur during oil displacement, resulting in poor oil displacement efficiency

Method used

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  • Sulfosuccinate salt type oil displacement agent, synthesis method and application thereof in tertiary oil recovery field
  • Sulfosuccinate salt type oil displacement agent, synthesis method and application thereof in tertiary oil recovery field
  • Sulfosuccinate salt type oil displacement agent, synthesis method and application thereof in tertiary oil recovery field

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preparation example Construction

[0032] The synthetic method of sulfosuccinate salt type oil displacement agent comprises the following steps:

[0033] 1) Add vegetable oil to the reaction kettle. The vegetable oil is one or a mixture of coconut oil, palm oil, and soybean oil. Add a certain amount of methanol and potassium hydroxide. The molar ratio of vegetable oil to methanol is 1:3-4 , the amount of potassium hydroxide added is 0.5-2% of the total mass of all materials, heated to 60-90 ° C, stirred for 3-5 hours, and left to stand for 0.5 hours to separate glycerin and methanol to obtain vegetable oil fatty acid methyl ester;

[0034] 2) Add a certain amount of monoethanolamine and alkali catalyst to the vegetable oil fatty acid methyl ester prepared in step 1), the alkali catalyst is one or more mixtures in sodium hydroxide, potassium hydroxide, sodium methylate, and the vegetable oil fatty acid methyl ester The molar ratio of ester to monoethanolamine is 1:1-1.05, the amount of alkali catalyst added is 0...

Embodiment 1

[0039] 1) Add vegetable oil to the reactor, the vegetable oil is palm oil, add a certain amount of methanol and potassium hydroxide, the molar ratio of vegetable oil to methanol is 1:3, the amount of potassium hydroxide added is 1% of the total mass of all materials, heat After stirring at 80°C for 4 hours, let stand for 0.5 hour, separate glycerin and methanol, and obtain vegetable oil fatty acid methyl ester;

[0040] 2) Add a certain amount of monoethanolamine and alkali catalyst to the vegetable oil fatty acid methyl ester prepared in step 1), the alkali catalyst is potassium hydroxide, the molar ratio of vegetable oil fatty acid methyl ester to monoethanolamine is 1:1~1.03, the alkali catalyst The addition amount is 2% of the total mass of all materials, the temperature is raised to 100° C., and the reaction is stirred for 4 hours to obtain vegetable oil fatty acid monoethanolamide;

[0041] 3) Put the vegetable oil fatty acid monoethanolamide into the pressure reaction ket...

Embodiment 2

[0048] 1) Add vegetable oil to the reactor, the vegetable oil is coconut oil, add a certain amount of methanol and potassium hydroxide, the molar ratio of vegetable oil to methanol is 1:4, the amount of potassium hydroxide added is 1.5% of the total mass of all materials, heat After stirring at 70°C for 4 hours, let stand for 0.5 hour, separate glycerol and methanol, and obtain vegetable oil fatty acid methyl ester;

[0049] 2) Add a certain amount of monoethanolamine and alkali catalyst to the vegetable oil fatty acid methyl ester prepared in step 1), the alkali catalyst is sodium hydroxide, the molar ratio of vegetable oil fatty acid methyl ester to monoethanolamine is 1:1.05, and the addition amount of alkali catalyst It is 1.5% of the total mass of all materials, the temperature is raised to 80° C., and the reaction is stirred for 5 hours to obtain vegetable oil fatty acid monoethanolamide;

[0050] 3) Put the vegetable oil fatty acid monoethanolamide into the pressure rea...

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Abstract

The invention discloses a sulfosuccinate salt type oil displacement agent. The general structural formula of the sulfosuccinate salt is: RCON(CH2CH2O)xCH2CH2OCOCH2CHSO3MnCOOM, wherein M is any one ofalkali metal and alkaline earth metal, n is the molar ratio of M to SO3 group, and when M is an alkali metal, n is 1; when M is an alkaline earth metal, n is 0.5; R is vegetable oil base, the carbon number is C5-21, and X is 2-10. And the vegetable oil base is one of or a mixture of several of coconut oil, palm oil and soybean oil. The oil displacement agent provided by the invention has good emulsifying capacity, temperature resistance and salt resistance, and has the characteristics of stable performance, easily available raw materials, easy industrial production and low price, under the conditions of high temperature and high salt, can reduce the oil-water interfacial tension value to ultralow, and at the same time has a good emulsifying effect on crude oil.

Description

technical field [0001] The invention belongs to the field of oil-displacement agents, and in particular relates to a sulfosuccinate salt type oil-displacement agent, a synthesis method and an application in the field of tertiary oil recovery. Background technique [0002] my country's major oil fields have entered a period of high water cut after primary and secondary exploitation, and crude oil production has declined year by year. It is imminent to maximize the development of remaining reserves and enhance oil recovery. [0003] Due to the complex environment of underground oil reservoirs, many oil reservoirs are under the "three high" conditions of high temperature, high salinity, and high calcium and magnesium ions, and the content of colloid and asphaltene in crude oil is high, and the viscosity of crude oil is high. The oil displacing agent is required to have good emulsification, temperature resistance, salt resistance, and high-valent ion resistance. Many surfactan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C07C309/17C07C303/32
CPCC09K8/584C07C309/17
Inventor 陈晓刚杜斌任建军刘军旗武红陈小丽
Owner DONGYING BAOMO ENVIRONMENT ENG CO LTD
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