Sulfonated partially-hydrolyzed polyacrylamide weak gel and preparation method thereof

A technology of polyacrylamide and sulfonated part is applied in the field of sulfonated partially hydrolyzed polyacrylamide weak gel and its preparation, and achieves the effects of good salt resistance and diffusivity, good temperature resistance and salt resistance, and good strength

Active Publication Date: 2020-01-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, introducing a benzene ring group with a rigid structure into the molecular chain of partially hydrolyzed polyacrylamide can enhance the temperature resistance, salt resistance and shear resistance of the gel, but there are no related reports so far.

Method used

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  • Sulfonated partially-hydrolyzed polyacrylamide weak gel and preparation method thereof
  • Sulfonated partially-hydrolyzed polyacrylamide weak gel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of preparation method of sulfonated partially hydrolyzed polyacrylamide weak gel of the present invention, specifically comprises the following steps,

[0039] Step 1. Dissolve 3 g of sulfonated partially hydrolyzed polyacrylamide in 1000 mL of distilled water, stir to dissolve, and obtain solution a, and place it at room temperature for 6 hours to be matured;

[0040] Step 2, add 0.4g of water-soluble phenolic resin to 100mL of solution a, and stir well to make it evenly mixed to obtain mixed system A;

[0041] Step 3, dissolving 5 g of sodium hydroxymethyl lignosulfonate in 95 g of distilled water, and stirring evenly to obtain solution b;

[0042] Step 4, add 0.8g of solution b to 100g of mixed system A, and stir evenly to obtain mixed system B;

[0043] Step 5: Put the mixed system B in an airtight container, and place the container in an incubator at 80° C. for 24 hours to react to obtain a sulfonated partially hydrolyzed polyacrylamide weak gel with a visc...

Embodiment 2

[0050] A kind of preparation method of sulfonated partially hydrolyzed polyacrylamide weak gel of the present invention, specifically comprises the following steps,

[0051] Step 1: Dissolve 3.5g of sulfonated partially hydrolyzed polyacrylamide in 1000mL of distilled water, stir to dissolve, obtain solution a, and place it at room temperature for 6h to mature;

[0052] Step 2, add 0.45g of water-soluble phenolic resin to 100mL of solution a, and stir well to make it evenly mixed to obtain mixed system A;

[0053] Step 3, dissolving 5g of sodium hydroxymethyl lignosulfonate in 95g of distilled water, and stirring evenly to obtain solution b;

[0054] Step 4, adding 0.9g of solution b to 100g of mixed system A, and stirring evenly to obtain mixed system B;

[0055] Step 5: Put the mixed system B in an airtight container, and place the container in a thermostat at 100° C. for 24 hours to react to obtain a sulfonated partially hydrolyzed polyacrylamide weak gel with a viscosity ...

Embodiment 3

[0057] A kind of preparation method of sulfonated partially hydrolyzed polyacrylamide weak gel of the present invention, specifically comprises the following steps,

[0058] Step 1. Dissolve 3 g of sulfonated partially hydrolyzed polyacrylamide in 1000 mL of distilled water, stir to dissolve, and obtain solution a, and place it at room temperature for 6 hours to be matured;

[0059] Step 2, add 0.4g of water-soluble phenolic resin to 100mL solution a, and stir well to make it evenly mixed to obtain the mixed system A;

[0060] Step 3, dissolving 5g of sodium hydroxymethyl lignosulfonate in 95g of distilled water, and stirring evenly to obtain solution b;

[0061] Step 4, add 0.6g of solution b to 100g of mixed system A, and stir evenly to obtain mixed system B;

[0062] Step 5: Put the mixed system B in an airtight container, and place the container in a thermostat at 90°C for 24 hours to react to obtain a sulfonated partially hydrolyzed polyacrylamide weak gel with a viscosi...

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Abstract

The invention relates to sulfonated partially-hydrolyzed polyacrylamide weak gel and a preparation method thereof. The method comprises: 1, placing a sulfonated partially-hydrolyzed polyacrylamide solution at a room temperature to obtain an aged sulfonated partially-hydrolyzed polyacrylamide solution, and adding a water-soluble phenol formaldehyde resin into the aged sulfonated partially-hydrolyzed polyacrylamide solution to obtain a mixed system A; 2, adding a sodium hydroxymethyl lignosulfonate solution into the mixed system A to obtain a mixed system B; and 3, carrying out a reaction on themixed system B for 12-72 h at a temperature of 60-110 DEG C 60 to obtain a sulfonated partially-hydrolyzed polyacrylamide weak gel. According to the invention, the polymer with a spatial three-dimensional network structure is formed, has good strength, god stability, goodsalt resistance and good dispersity, can be dissolved in water with any hardness, is good in aqueous solution chemical stability, has good temperature resistance and good salt resistance when being used for oilfield profile control, and has great application potential in the field of oilfield water shutoff and profile control.

Description

technical field [0001] The invention belongs to the field of polyacrylamide weak gel, in particular to a sulfonated partially hydrolyzed polyacrylamide weak gel and a preparation method thereof. Background technique [0002] Partially hydrolyzed polyacrylamide is one of the most widely used water-soluble polymers. It is widely used in profile control and oil displacement in oil field industry. However, the molecular chain of this polymer will shrink under the salinity environment, and it will be combined with high-valent metal ions. The action will produce precipitation, accelerate hydrolysis, and lead to a serious loss of performance. Therefore, in order to improve the stability of partially hydrolyzed polyacrylamide aqueous solution in high temperature and high-salt environment, groups with hydrophilic, temperature-resistant and salt-resistant functions are often introduced into the partially hydrolyzed polyacrylamide molecules, or groups with temperature-resistant and sal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08L33/26C08L97/00C08L61/06
CPCC08J3/075C08J3/246C08J2333/26C08J2497/00C08J2461/06
Inventor 郭睿霍文生冯文佩李秀环刘雪艳高弯弯
Owner SHAANXI UNIV OF SCI & TECH
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