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Active functional polymer and preparation method and application thereof

A polymer and functional technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of flooding and plugging agents that cannot meet the requirements of flooding and plugging, and improve surface activity, Effect of improving polymerization activity, excellent thickening and emulsifying oil washing ability

Active Publication Date: 2020-12-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an active functional polymer and its Preparation method, the active functional polymer has excellent surface activity and high temperature and high salt resistance

Method used

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  • Active functional polymer and preparation method and application thereof
  • Active functional polymer and preparation method and application thereof
  • Active functional polymer and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0095]1. Add 25.5g of acrylamide (mass content 85%) into an insulated polymerization reaction bottle (ie, a polymerization bottle), add 70g of deionized water to dissolve and make an aqueous solution, and then add sodium hydroxide to adjust the pH to 6;

[0096] 2. Add 1.5g functional monomer X (mass content 5%), 3g functional monomer Y1 (mass content 10%), emulsifier 0.25g, 1% EDTA-2Na aqueous solution 1g, urea 1g, pentamethyl di Ethylenetriamine 280mg, fully stirred to form stable micelles;

[0097] 3. Control the temperature of the aqueous solution at 20°C. After 30 minutes of blowing nitrogen to drive oxygen, add 2.5g of 0.2% potassium persulfate aqueous solution and 2.5g of 0.1% sodium bisulfite aqueous solution to initiate the reaction, and continue to pass nitrogen for 5 minutes. Stop, polymerize for 8 hours after sealing;

[0098] 4. Take out the rubber block, add 0.4g granulated alkali after granulation, mix evenly, and then carry out hydrolysis at 80°C for 3 hours; ...

Embodiment 2

[0102] 1. Add 28.5g of acrylamide (mass content 95%) into an insulated polymerization reaction bottle (that is, a polymerization bottle), add 70g of deionized water to dissolve and make an aqueous solution, and then add sodium hydroxide to adjust the pH to 10.0;

[0103] 2, add 0.15g functional monomer X (mass content 0.5%) successively, 1.35g functional monomer Y2 (mass content 4.5%), emulsifier 0.2g, 1% EDTA-2Na aqueous solution 2.0g, urea 0.5g, five Methyldiethylenetriamine 60.0mg, fully stirred to form stable micelles;

[0104] 3. Control the temperature of the aqueous solution at 25°C. After 30 minutes of blowing nitrogen to drive oxygen, add 4 g of 0.2% potassium persulfate aqueous solution and 4 g of 0.1% sodium bisulfite aqueous solution to initiate the reaction, and continue to pass nitrogen for five minutes before stopping. Polymerization after sealing for 9.5 hours;

[0105] 4. Take out the rubber block, add 0.6g granulated alkali after granulation, mix evenly, and...

Embodiment 3

[0109] 1. Add 27.6g of acrylamide (mass content 92%) into an insulated polymerization reaction bottle (ie, a polymerization bottle), add 70g of deionized water to dissolve and make an aqueous solution, and then add sodium hydroxide to adjust the pH to 7.2;

[0110] 2. Add 0.75g functional monomer X (mass content 3%), 1.5g functional monomer Y3 (mass content 5%), emulsifier 0.3g, 1% EDTA-2Na aqueous solution 2g, urea 1.5g, pentagram Diethylenetriamine 200mg, fully stirred to become stable micelles;

[0111] 3. Control the temperature of the aqueous solution at 25°C. After 30 minutes of blowing nitrogen to drive oxygen, add 6.5g of 0.2% potassium persulfate aqueous solution and 6.5g of 0.1% sodium bisulfite aqueous solution to initiate the reaction, and continue blowing nitrogen for 5 minutes Stop, polymerize for 10 hours after sealing;

[0112] 4. Take out the rubber block, add 0.5g granulated alkali after granulation, mix evenly, and then carry out hydrolysis at 85°C for 3.0 ...

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Abstract

The invention relates to the field of acrylamide copolymers, and discloses an active functional polymer as well as a preparation method and application thereof. The polymer comprises a structural unitA, a structural unit B and a structural unit C. The structural unit A is a structural unit represented by the following formula (1), the structural unit B is a structural unit represented by the following formula (2), the structural unit C is a structural unit represented by the following formula (3), n = 35-50, and R is one of -OH, -NH2 and -COOH. The active functional polymer disclosed by the invention has excellent surface and interface activity and high-temperature salt resistance, and is suitable for profile control and flooding agents, profile control and plugging agents and oil displacement agents for oil fields.

Description

technical field [0001] The invention relates to the field of acrylamide copolymers, in particular, the invention relates to an active functional polymer and its preparation method and application. Background technique [0002] In the 1990s, with the continuous increase of oilfield water cut, oilfield water plugging technology entered a new stage of development, the types of plugging agents increased rapidly, the number of wells treated increased, and the economic effect was also significantly improved. my country's oilfields generally adopt the water injection development method. The formation heterogeneity is serious, the reservoir geology is complex, and the water cut rises faster in the middle and later stages of development. With the increase of water injection, the inhomogeneity of the water injection profile further increases, resulting in a large amount of water produced by the oil well. [0003] At present, the average water content of oil wells has reached more than...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/56C08F234/00C08F2/26C08F2/38C09K8/588C09K8/508C09K8/88
CPCC08F283/065C08F2/26C08F2/38C09K8/588C09K8/5083C09K8/882C08F220/56C08F234/00Y02E60/10
Inventor 赵方园王晓春杨捷
Owner CHINA PETROLEUM & CHEM CORP
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