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Preparation method of high-polymer viscosity reducer for heavy oil production

A technology of polymer and viscosity reducer, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high production cost and large amount of viscosity reducer surfactant.

Active Publication Date: 2019-10-25
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems that the existing viscosity reducer uses a large amount of surfactant, the production cost is high, the amount of heavy oil emulsified by the viscosity reducer is small during the formation migration process, and the emulsion formed by the viscosity reducer is too stable and difficult to break. , the invention provides a preparation method of a polymer viscosity reducer for heavy oil development

Method used

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  • Preparation method of high-polymer viscosity reducer for heavy oil production
  • Preparation method of high-polymer viscosity reducer for heavy oil production
  • Preparation method of high-polymer viscosity reducer for heavy oil production

Examples

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preparation example Construction

[0012] A preparation method of a polymer viscosity reducer for heavy oil development, comprising the following steps:

[0013] Preparation steps of macromolecular functional monomers: azobisisobutyronitrile, nitrogen-containing heterocyclic monomers, styrene, monomers containing ethylene oxide segments, acrylamide, and dimethylformamide under the action of chain transfer agents A polymerization reaction occurs, and then triethylamine and acryloyl chloride are added to carry out a modification reaction to obtain a macromolecular functional monomer;

[0014] The preparation steps of the polymer viscosity reducer: the macromolecule functional monomer, the non-ionic aqueous solution monomer, and the anion water-soluble monomer, under the action of an initiator, polymerize the polymer viscosity reducer through aqueous solution.

[0015] Preferably according to the present invention, the specific preparation method of macromolecular functional monomer is as follows:

[0016] After ...

specific Embodiment approach

[0042] In order to better understand the present invention, it will be further described below in conjunction with specific examples.

[0043] The experimental methods used in the examples are conventional methods unless otherwise specified.

[0044] The materials and reagents used in the examples can be obtained from commercial sources unless otherwise specified.

Embodiment 1

[0046] A kind of preparation method of polymer viscosity reducer for heavy oil development, the steps are as follows:

[0047] (1) Preparation of macromolecular functional monomers

[0048] 4g of azobisisobutyronitrile, 1g of mercaptoethylamine, 4g of 1-vinylimidazole, 6g of styrene, 10g of ethylene oxide-containing segment monomers (m is 5), 5.5g of acrylamide, and 100g of dimethyl Formamide was added to a four-neck glass bottle equipped with a stirrer, a nitrogen pipe, a spherical condenser and a thermometer, stirred until all the raw materials were dissolved, then nitrogen gas was introduced for 30 minutes, and the temperature was raised to 60°C for polymerization for 6 hours; then the system temperature Control the temperature at 0-5°C, add 6.5g triethylamine and 5g acryloyl chloride, modify the reaction for 12h under stirring, precipitate the product with ether, and distill the volatile components under reduced pressure at 50°C to obtain macromolecular functional monolaye...

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Abstract

The invention relates to a preparation method of a high-polymer viscosity reducer for heavy oil production. According to the preparation method, by utilizing cysteamine as a chain transfer agent, a macromolecule functional monomer containing various functional groups such as nitrogen heterocyclic rings, benzene rings and ethylene oxide chain segments is prepared, then the macromolecule functionalmonomer, acrylamide, vinyl pyrrolidone, acrylic acid and a 2-acrylamide-2-methylpropanesulfonic acid water-soluble monomer are taken as raw materials, and a water-soluble polymer with a comb-shaped functional structure is prepared through aqueous solution polymerization. The product has the good dissolving property in an aqueous solution, and the viscosity of heavy oil can be lowered significantly. In addition, oil-water separation is easy under still standing of a heavy oil viscosity-reducing sample, and produced liquid is convenient to treat.

Description

technical field [0001] The invention relates to a preparation method of a polymer viscosity reducer for heavy oil development, belonging to the technical field of oil field chemistry. Background technique [0002] With the continuous development of modern industry and the continuous improvement of economic level, the demand for energy in human society is getting higher and higher. Petroleum is one of the most important energy supply resources at present, and its exploitation and utilization are of great significance to the development of national economy and the stability of national security. With the continuous exploitation of crude oil resources and oil and gas resources are non-renewable energy sources, most of the light oil resources have been exploited by human beings. Therefore, at present, people use heavy oil, heavy oil and high-wax crude oil and other slightly inferior oil products. Crude oil is the key object of development and utilization. Due to its complex co...

Claims

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Application Information

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IPC IPC(8): C08F216/14C08F226/06C08F212/08C08F220/56C08F261/06C08F220/58C08F220/06C08F8/10C08F2/38C09K8/588
CPCC08F216/1416C08F8/10C08F2/38C08F261/06C09K8/588C08F216/1433C08F226/06C08F212/08C08F220/56C08F220/06
Inventor 刘义刚王秋霞吴婷张华于晓涛邹琦刘昊董世超王弘宇曹杰
Owner CHINA NAT OFFSHORE OIL CORP
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