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A kind of anti-alkali polyacrylamide and preparation method thereof

A polyacrylamide and acrylamide technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as viscosity reduction, and achieve the effects of reducing oil production costs, saving consumption, and increasing alkali resistance.

Active Publication Date: 2020-08-04
黑龙江吉地油田服务股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first object of the present invention is to overcome the problem in the prior art that the viscosity of the polymer dissolves under alkaline conditions, and to provide a kind of alkali-resistant polyacrylamide, which improves the initial viscosity of the polymer under alkaline conditions and viscosity retention rate, reduce the amount of polymer used during use, and reduce the cost of oil recovery

Method used

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  • A kind of anti-alkali polyacrylamide and preparation method thereof
  • A kind of anti-alkali polyacrylamide and preparation method thereof
  • A kind of anti-alkali polyacrylamide and preparation method thereof

Examples

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Embodiment 1

[0022] A kind of anti-alkali type polyacrylamide and preparation method thereof:

[0023] (1) 100 parts by weight of acrylamide, 10 parts by weight of acrylic acid, 5 parts by weight of nonionic monomer, 5 parts by weight of AMPS, and 200 parts by weight of water are mixed, stirred evenly, and adjusted with a sodium hydroxide solution of 10% by mass percentage concentration The pH value is 7.2, adding 0.03 parts by weight of disodium edetate and stirring evenly, wherein the nonionic monomer is n=12;

[0024] (2) Add the solution prepared in step (1) into the reactor, control the stirring speed at 680-720r / min, control the temperature of the reaction system at 8-12°C, blow nitrogen for 20min, and add azobisisobutylamidine salt 0.03 parts by weight of salt, 0.01 parts by weight of potassium persulfate and 0.01 parts by weight of sodium thiosulfate were added after 10 minutes. After the system was heated to 2°C, the nitrogen flow was stopped, and the reaction was raised to the ...

Embodiment 2

[0027] A kind of anti-alkali type polyacrylamide and preparation method thereof:

[0028] (1) 200 parts by weight of acrylamide, 30 parts by weight of acrylic acid, 12 parts by weight of nonionic monomers, 20 parts by weight of AMPS, and 400 parts by weight of water are mixed, stirred evenly, and adjusted with a sodium hydroxide solution with a mass percent concentration of 10%. The pH value is 7.2, adding 0.02 parts by weight of disodium edetate and stirring evenly, wherein the nonionic monomer is n=16;

[0029] (2) Add the solution prepared in step (1) into the reactor, control the stirring speed at 680-720r / min, control the temperature of the reaction system at 8-12°C, pass nitrogen gas for 20min, and add 0.04 weight of azobisisobutyronitrile After 10 minutes, 0.02 parts by weight of ammonium persulfate and 0.02 parts by weight of sodium bisulfite were added. After the system was heated to 2°C, the nitrogen flow was stopped, and the reaction was raised to the highest temp...

Embodiment 3

[0032] A kind of anti-alkali type polyacrylamide and preparation method thereof:

[0033] (1) 120 parts by weight of acrylamide, 20 parts by weight of acrylic acid, 10 parts by weight of nonionic monomers, 10 parts by weight of AMPS, and 300 parts by weight of water are mixed, stirred evenly, and adjusted with a sodium hydroxide solution of 10% by mass percentage concentration The pH value is 7.3, adding 0.03 parts by weight of disodium edetate and stirring evenly, wherein the nonionic monomer is n=14;

[0034] (2) Add the solution prepared in step (1) into the reactor, control the stirring speed at 680-720r / min, control the temperature of the reaction system at 8-12°C, pass nitrogen gas for 20min, and add 0.05 weight of azobisisoheptanonitrile After 10 minutes, 0.01 parts by weight of sodium persulfate and 0.01 parts by weight of triethanolamine were added. After the system was heated to 2°C, the nitrogen flow was stopped, and the reaction was raised to the highest temperat...

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Abstract

The invention discloses alkali-resistant type polyacrylamide, and belongs to the technical field of petroleum exploitation. The alkali-resistant type polyacrylamide comprises 100-200 parts of polyacrylamide, 10-30 parts of acrylic acid, 5-12 parts of nonionic monomers, 5-20 parts of AMPS (2-acrylamide-2-methyl propanesulfonic acid), 200-400 parts of water and 0.01-0.04 part of ethylene diamine tetraacetic acid. The invention further discloses a method for preparing the alkali-resistant type polyacrylamide. The alkali-resistant type polyacrylamide and the method have the advantages that the initial viscosity of polymers under alkaline conditions can be improved, the viscosity retention rate of the polymers under the alkaline conditions can be increased, the usage of the polymers can be reduced in use procedures, and accordingly the oil production cost can be lowered.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and relates to an alkali-resistant polyacrylamide and a preparation method thereof. Background technique [0002] Chemical flooding is currently one of the main methods for enhancing oil recovery in tertiary oil recovery, and it is also the main method for stable and high production in some mature oil fields. As far as chemical flooding is concerned, it includes polymer flooding, surfactant flooding, alkali flooding, polymer-surfactant binary flooding and alkali-surfactant-polymer (ASP) ASP flooding. [0003] With the increasing difficulty of oilfield exploitation in my country, ASP flooding technology has been popularized and applied. When conventional polyacrylamide is used for ASP flooding, the viscosity of conventional polymers decreases sharply due to the presence of strong alkali sodium hydroxide. , to ensure the application effect, the amount of polyacrylamide must be increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F216/14C08F220/58C09K8/588C09K8/88
CPCC08F220/56C09K8/588C09K8/882C08F220/06C08F216/1416C08F220/585
Inventor 孙安顺
Owner 黑龙江吉地油田服务股份有限公司