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Instant polyacrylamide for offshore oil displacing and synthesis method thereof

A technology of polyacrylamide and synthesis method, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor solubility, failure to meet the use requirements, slow dissolution speed, etc., to ensure shear Degradation and temperature resistance, improve salt resistance, increase the effect of molecular weight

Inactive Publication Date: 2019-01-04
TIANJIN BO HONG CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, polyacrylamide is mainly used for polymer flooding. Due to the salt-sensitive effect of ordinary polyacrylamide for oil flooding, the solubility becomes poorer, the dissolution rate becomes slower, and the viscosity becomes lower under high salinity. Requirements for the use of oil displacement polyacrylamide

Method used

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  • Instant polyacrylamide for offshore oil displacing and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 724.6g of distilled water to a 1L jar, then add 11.5g of sodium hydroxide, dissolve evenly, slowly add 60g of functional monomer AMPS, dissolve evenly in a constant temperature water bath below 12°C, adjust the pH value to 12, and let it stand for 10 minutes Add 200g of refined AM monomer, 2g of sodium chloride, and 1.5g of urea, cool down to -2°C and transfer to a Dewar flask, pass through 99.999% high-purity nitrogen to remove oxygen, add 0.32g of EDTA after 10 minutes, and continue to pass through Add 0.1 g of azobisisoheptanonitrile after 20 minutes of deoxygenation with nitrogen, and then add 0.002 g of tert-butyl hydroperoxide after 20 minutes of deoxygenation with nitrogen, then add 0.01 g of ferrous ammonium sulfate after 2 minutes, and then continue to pass nitrogen to the solution Seal when it becomes sticky.

[0016] After the temperature of the solution rises to the highest value and cools down naturally for 2 hours, take out the colloid from the Dewar b...

Embodiment 2

[0018] Add 720.9g of distilled water to a 1L jar, then add 15.2g of sodium hydroxide, dissolve evenly, slowly add 80g of functional monomer AMPS, dissolve evenly in a constant temperature water bath below 12°C, adjust the pH value to 12, and let it stand for 10 minutes Add 180g of refined AM monomer, 1.5g of sodium chloride, and 2g of urea, cool down to -2°C and transfer to a Dewar flask, pass through 99.999% high-purity nitrogen to remove oxygen, add 0.16g of EDTA after 10 minutes, and continue to pass through Add 0.2 g of azobisisoheptanonitrile after deoxygenation with nitrogen for 20 minutes, then add 0.005 g of tert-butyl hydroperoxide after 20 minutes of deoxygenation with nitrogen, then add 0.006 g of ferrous ammonium sulfate after 2 minutes, and then continue to pass nitrogen to the solution Seal when it becomes sticky.

[0019] After the temperature of the solution rises to the highest value and cools down naturally for 2 hours, take out the colloid from the Dewar bot...

Embodiment 3

[0021] Add 723g of distilled water to a 1L jar, then add 13g of sodium hydroxide, dissolve evenly, slowly add 70g of functional monomer AMPS, dissolve evenly in a constant temperature water bath below 12°C, adjust the pH value to 12, and then add refined AM monomer 190g, sodium chloride 1.8g, urea 1.8g, cool down to -2°C and transfer to a Dewar flask, pass through 99.999% high-purity nitrogen to remove oxygen, add EDTA 0.2g after 10 minutes, continue to pass nitrogen Add 0.15 g of azobisisoheptanonitrile after deoxygenation for 20 minutes, then add 0.004 g of tert-butyl hydroperoxide after 20 minutes of deoxygenation with nitrogen, then add 0.008 g of ferrous ammonium sulfate after 2 minutes, and then continue to pass nitrogen until the solution becomes Seal when sticky.

[0022] After the temperature of the solution rises to the highest value and cools down naturally for 2 hours, take out the colloid from the Dewar bottle, granulate it into particles with a diameter of 3-5mm,...

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Abstract

The invention provides instant polyacrylamide for offshore oil displacing, which comprises a sulfonic acid group, the salt resistance of the instant polyacrylamide for offshore oil displacing reaches326.3 million mineralization degrees, the total amount of calcium and magnesium ions reaches 885 mg / L, and temperature is 85 DEG C. The method comprises the following steps: 1, in a redox and azo compound initiation system, a refined acrylamide monomer AM and a functional monomer AMPS react at an initiation temperature of 2 DEG C to obtain colloid; 2, granulating, hydrolyzing, drying, crushing andsieving are carried out. According to the invention, the redox and azo compound initiation system are used for polymerization under the ultra-low temperature, a sulfonic acid group strong water groupis introduced into the polyacrylamide, and self-made mixed stabilizer is added at the same time of hydrolysis, so that the salt resistance of the polyacrylamide is improved, the ultrahigh molecular weight shear degradation and temperature resistance are ensured, the dissolving speed is improved, and the dissolving performance is improved.

Description

technical field [0001] The invention relates to the technical field of polymer compounds, in particular to an instant polyacrylamide for offshore oil flooding and a synthesis method thereof. Background technique [0002] Three-element oil recovery technologies such as polymer flooding, binary compound flooding (alkali-polymer), and three-element compound oil flooding (alkali-surfactant-polymer) have been widely used and achieved significant oil increase. Precipitation effect and good economic benefits. Among them, polyacrylamide is mainly used for polymer flooding. Due to the salt-sensitive effect of ordinary polyacrylamide for oil flooding, the solubility becomes poorer, the dissolution rate becomes slower, and the viscosity becomes lower under high salinity. Requirements for the use of oil-displacing polyacrylamide. How to improve the structure of polyacrylamide so that it can meet the requirements of rapid dissolution in seawater and have a relatively stable viscosity i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C09K8/588
CPCC08F220/56C09K8/588C08F220/585
Inventor 刘存辉李元军李雷振王欢庞玉山胡良义郑伟刘洁孙凤萍石昀范翠杰崔萌陈芝娟张宇赵东旭马亮吴海宁霍艳玲李玉亮毛艳妮蓝海宽朱卓岩
Owner TIANJIN BO HONG CHEM
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