Modified cellulose-based poly-surfactant, emulsifying viscosity reducer, preparation method of modified cellulose-based poly-surfactant and application of modified cellulose-based poly-surfactant and emulsifying viscosity reducer in viscosity reduction of thickened oil

A polymer-based surface agent, emulsification and viscosity-reducing technology, applied in modified cellulose-based surface-polymerization agent, heavy oil viscosity reduction, emulsification viscosity-reducer and its preparation field, can solve the difficult to achieve microbial influence, salt tolerance Poor performance, difficulty in separating microorganisms, etc., to achieve the effect of facilitating crude oil transportation and remarkable viscosity reduction effect

Pending Publication Date: 2022-03-04
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microbial viscosity reduction method has little damage to the formation and is environmentally friendly, but it is difficult to separate microorganisms suitable for growth in a specific reservoir environment, and it is also difficult to reduce and eliminate the influence of reservoir environmental factors on microorganisms
Emulsion visco

Method used

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  • Modified cellulose-based poly-surfactant, emulsifying viscosity reducer, preparation method of modified cellulose-based poly-surfactant and application of modified cellulose-based poly-surfactant and emulsifying viscosity reducer in viscosity reduction of thickened oil
  • Modified cellulose-based poly-surfactant, emulsifying viscosity reducer, preparation method of modified cellulose-based poly-surfactant and application of modified cellulose-based poly-surfactant and emulsifying viscosity reducer in viscosity reduction of thickened oil
  • Modified cellulose-based poly-surfactant, emulsifying viscosity reducer, preparation method of modified cellulose-based poly-surfactant and application of modified cellulose-based poly-surfactant and emulsifying viscosity reducer in viscosity reduction of thickened oil

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051]Example 1 Preparation of a modified embodiment of a cellulose-based agent polyepichlorohydrin

[0052] Proceed as follows:

[0053] Step (1) Weigh 10g of γ- methacryloxypropyl trimethoxy silane, was dispersed in 100g of ethanol and water mixture, wherein the mass ratio of ethanol and water to 9: 1, acetic acid adjustment system pH 4, followed by stirring at room temperature for 0.5h, the modifying agent is evenly dispersed;

[0054] Step (2) 5g of said diameter of 100nm carboxymethyl cellulose is added in step (1) the dispersion prepared, with rapid stirring at a reaction temperature 50 ℃ 1h modified cellulose solution to give a double bond;

[0055] Step (3) in step (2) the mixture was filtered, washed cake was dried to obtain a modified cellulose powder double bond;

[0056] Step (4) was weighed in step (3) 5g of a double bond modified cellulose powder was dispersed in 100g of water.

[0057] Step (5) was weighed 20g a- olefin sulfonate is added in step (4) the dispersion ...

Example Embodiment

[0062] Preparation Example 2 emulsion viscosity reducer

[0063] Proceed as follows:

[0064] The modified cellulose ethers of polyoxyethylene fatty alcohol 10g, 20g of the base prepared in Example 1 was added 70g water polyepichlorohydrin agent, uniformly mixed to obtain emulsion viscosity reducer.

Example Embodiment

[0065] Example 3 Preparation of modified cellulose-based agents embodiment polyepichlorohydrin

[0066] Proceed as follows:

[0067] Step (1) 15g was weighed vinyltrimethylsilane, 100g was dispersed in a mixture of ethanol and water, wherein the mass ratio of ethanol and water to 9: 1, of citric acid was added adjust the pH value of the system 5, stirred at room temperature 0.8h, the modifying agent is evenly dispersed;

[0068] Step (2), said particle diameter is 200nm taken 8g hydroxypropyl methylcellulose was added in step (1) the dispersion prepared, with rapid stirring at a reaction temperature 60 ℃ 1h modified cellulose solution to give a double bond ;

[0069] Step (3) in step (2) the mixture was filtered, washed cake was dried to obtain a modified cellulose powder double bond;

[0070] Step (4) was weighed in step (3) double bond modified cellulose powder was dispersed in 8g prepared in 100g of water.

[0071] Step (5) weighing 25g 2- acrylamido-2-methylpropane sulfonate w...

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Abstract

The invention provides a modified cellulose-based poly-surfactant, an emulsifying viscosity reducer, a preparation method of the modified cellulose-based poly-surfactant and an application of the emulsifying viscosity reducer in viscosity reduction of thickened oil, the modified cellulose-based poly-surfactant has a structure as shown in a formula I, the viscosity-average molecular weight of the modified cellulose-based poly-surfactant is 100,000-1,200,000, and the modified cellulose-based poly-surfactant is obtained by carrying out free radical copolymerization on double-bond modified cellulose and a viscosity reduction monomer. The natural cellulose with large specific surface area and rich surface grafting sites is utilized, a large number of viscosity reducing monomers are introduced to the surface of the natural cellulose, the thick oil can be effectively emulsified, the viscosity of the thick oil is reduced, the cellulose in the viscosity reducer can be adsorbed on the surface of oil drops, oil drops can be prevented from being gathered, the emulsified state of the crude oil is maintained for a long time, the crude oil transportation is facilitated, and the viscosity of the crude oil is reduced. Meanwhile, cellulose is biodegradable and has no influence on the quality of crude oil.

Description

technical field [0001] The invention belongs to the technical field of viscosity reducer preparation, and in particular relates to a modified cellulose-based polysurfactant, an emulsified viscosity reducer, a preparation method thereof and an application in viscosity reduction of heavy oil. Background technique [0002] With the continuous consumption of petroleum resources, the reserves of high-quality light crude oil are also decreasing day by day. Therefore, how to better develop unconventional oil reservoirs such as high-wax heavy oil, heavy oil, and extra-ultra-heavy oil has attracted widespread attention from researchers at home and abroad. my country is rich in heavy oil resources, and more than 70 heavy oil fields have been discovered in 12 basins across the country. However, due to the complex composition, poor fluidity, and high viscosity of heavy oil, traditional extraction techniques cannot be fully recovered. The development of an efficient and universal chemic...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F228/02C08F220/58C08F220/32C09K8/584
CPCC08F251/02C09K8/584C08F228/02C08F220/585C08F220/325
Inventor 赵莎莎陈士勇马玉田玉芹陶震王耀国
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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