Polymeric surfactant heavy oil viscosity reducer and preparation method

A technology of surfactant and heavy oil viscosity reducer, which is applied in the field of oil recovery additives, can solve the problems of poor viscosity reduction effect of heavy oil viscosity reducer, reduce the viscosity of heavy oil, etc., achieve easy raw material acquisition, reduce crude oil viscosity, The effect of high natural dehydration rate

Active Publication Date: 2019-09-13
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the poor viscosity-reducing effect of existing heavy oil viscosity reducers. A polymer surfactant type heavy oil viscosity reducer and its preparation method are provided. A small amount of this product can effectively reduce the viscosity of heavy oil

Method used

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  • Polymeric surfactant heavy oil viscosity reducer and preparation method
  • Polymeric surfactant heavy oil viscosity reducer and preparation method
  • Polymeric surfactant heavy oil viscosity reducer and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Synthesis of monoester intermediates

[0027] Add maleic anhydride to nonylphenol polyoxyethylene ether in a molar ratio of 1:1 into a three-necked flask equipped with a stirring device, a condensing reflux device and a thermometer, raise the reaction temperature to 100°C, and then add 3% by weight of p-toluenesulfonic acid was used as a catalyst, and the reaction was performed with magnetic stirring for 3.5 hours to obtain an intermediate.

[0028] (2) Preparation of target product

[0029] Add the obtained intermediate and acrylamide into a three-necked flask with a molar ratio of 1:1, then add an appropriate amount of deionized water, stir well, and add potassium persulfate accounting for 5% by weight of the total mass of the reactants as an initiator. agent, the reaction temperature was raised to 45° C., nitrogen was passed for 20 minutes, the air in the flask was removed, and the reaction was carried out under a nitrogen atmosphere for 7 hours to obtain a visc...

Embodiment 2

[0032] (1) Synthesis of monoester intermediates

[0033] Add maleic anhydride to nonylphenol polyoxyethylene ether in a molar ratio of 1:2 into a three-necked flask equipped with a stirring device, a condensation reflux device and a thermometer, raise the reaction temperature to 100°C, and then add 3% by weight of p-toluenesulfonic acid was used as a catalyst, and the reaction was performed with magnetic stirring for 3.5 hours to obtain an intermediate.

[0034] (2) Preparation of target product

[0035] The specific preparation method is the same as step (2) in Example 1.

[0036] The prepared viscosity reducer was formulated into an aqueous solution with a concentration of 0.5wt%, and then the viscosity reducer aqueous solution was mixed with Tarim heavy oil at an oil-water mass ratio of 7:3, stirred evenly, and kept at 50°C for 1.5 hours, and finally Measure its viscosity at 50°C and calculate the viscosity reduction rate. The results are shown in Table 1.

Embodiment 3

[0038] (1) Synthesis of monoester intermediates

[0039] Add maleic anhydride to nonylphenol polyoxyethylene ether in a molar ratio of 2:1 into a three-necked flask equipped with a stirring device, a condensing reflux device and a thermometer, raise the reaction temperature to 100°C, and then add 3% by weight of p-toluenesulfonic acid was used as a catalyst, and the reaction was performed with magnetic stirring for 3.5 hours to obtain an intermediate.

[0040] (2) Preparation of target product

[0041] The specific preparation method is the same as step (2) in Example 1.

[0042] The prepared viscosity reducer was formulated into an aqueous solution with a concentration of 0.5wt%, and then the viscosity reducer aqueous solution was mixed with Tarim heavy oil at an oil-water mass ratio of 7:3, stirred evenly, and kept at 50°C for 1.5 hours, and finally Measure its viscosity at 50°C and calculate the viscosity reduction rate. The results are shown in Table 1.

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Abstract

The invention discloses a polymeric surfactant heavy oil viscosity reducer and a preparation method, and mainly solves the problem of poor viscosity reduction effect of existing heavy oil viscosity reducers. The preparation method includes: firstly reacting maleic anhydride with nonylphenol polyoxyethylene ether to obtain an intermediate product, and then reacting the intermediate product with a certain amount of acrylamide to prepare the polymeric surfactant. The surfactant has the advantages of reliable preparation process, low cost and low use concentration, and has the ability of significantly reducing the heavy oil viscosity.

Description

technical field [0001] The invention belongs to the field of oil recovery additives for oil fields, and in particular relates to a polymer surfactant type heavy oil viscosity reducer and a preparation method thereof. Background technique [0002] With the continuous development of society, the consumption of fossil energy is also increasing. Heavy oil resources account for most of the proven oil resources. Heavy oil refers to the crude oil whose viscosity of degassed crude oil exceeds 100 mPa·s at the reservoir temperature. Heavy oil contains more waxes, colloids, and asphaltenes, which makes its viscosity higher than conventional crude oil, poor fluidity, and difficult to mine. In order to solve this series of problems, a lot of research has been done on viscosity reduction of heavy oil at home and abroad, and some achievements have been obtained. Over the years, these achievements have been continuously improved and perfected in field applications, and a relatively comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C08F220/56C08F220/30
CPCC08F220/56C09K8/584
Inventor 毛金成亢智杨小江林冲毛金桦
Owner SOUTHWEST PETROLEUM UNIV
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