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Hydrophobic polymer graft modified acrylamide polymer and preparation method thereof

An acrylamide-based, hydrophobic polymer technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of temperature resistance, salt resistance, aging resistance and poor displacement effect, etc., to achieve enhanced oil recovery , improve the effect of heat resistance and salt resistance, not easy to curl

Active Publication Date: 2016-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that when the general-purpose acrylamide polymers in the prior art are used in the field of three mines, there are problems of poor temperature resistance, salt resistance, aging resistance and poor displacement effect. Hydrophobic polymer graft modified acrylamide polymer

Method used

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  • Hydrophobic polymer graft modified acrylamide polymer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Inject 0.10mol 1-hydroxyl-2,2,5-trimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane, 0.12mol di Cumene and 0.8mol N,N-dimethylacrylamide reacted at 87°C for 6 hours, then added isopropanol to terminate the reaction, and precipitated with ether, the obtained hydrophobic association poly-N,N with a molecular weight of 770 -Dimethacrylamide homopolymer. 0.08g of the obtained polymer and 2.2g of polyacrylamide with a viscosity-average molecular weight of 28.5 million were dispersed in 97g of potassium carbonate aqueous solution (pH=8.0) under strong stirring, and graft copolymerization occurred under the action of reflux , to obtain the graft modified polymer polyacrylamide-g-poly N, N-dimethylacrylamide.

[0021] Use the following methods or standards to test the structure and performance of the grafted modified polyacrylamide obtained by the hydrophobic polymer: measure the intrinsic viscosity of the polymer according to GB / T12005.10-92 polyacrylamide molecular weight dete...

Embodiment 2

[0024] Inject 0.13mol 1-chloro-2,5-dimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane, 0.15mol benzoyl peroxide into the dry reaction flask After reacting with 0.25mol N-n-dodecyl acrylamide at 75°C for 7 hours, adding isopropanol to terminate the reaction, and precipitating with ether, a hydrophobic association poly-N-n-dodecyl group with a molecular weight of 500 was obtained. Acrylamide homopolymer. Gained copolymer 0.06g and 1.98g viscosity-average molecular weight are 26,700,000 poly(acrylamide-r-2-acrylamido-2-sodium methylpropanesulfonate) (degree of hydrolysis 18.2%), under strong stirring , dispersed in 98g potassium bicarbonate aqueous solution (pH = 10.0), under the action of reflux, graft copolymerization reaction occurs to obtain graft modified polymer poly(acrylamide-r-2-acrylamide-2-methane Sodium propane sulfonate)-g-poly N-n-dodecyl acrylamide.

[0025] The structure and properties of the hydrophobic polymer graft-modified acrylamide polymer obtained were test...

Embodiment 3

[0027] Inject 0.11mol 1-amino-2,5,5-trimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane, 0.125mol isopropyl Benzene hydroperoxide, 0.2mol N-tert-butylacrylamide and 0.1mol N-phenylacrylamide were reacted at 92°C for 7 hours, and isopropanol was added to terminate the reaction. After precipitation with ether, a hydrophobic olefin with a molecular weight of 350 was obtained. Poly(N-tert-butylacrylamide-r-N-phenylacrylamide) random copolymer. 0.05 g of the obtained copolymer and 1.7 g of ultra-high molecular weight polyacrylamide with a viscosity-average molecular weight of 17.2 million were dispersed in 99 g of potassium hydroxide aqueous solution (pH=9.8) under the action of strong stirring, and contact occurred under the action of reflux. Branch copolymerization reaction to obtain graft modified polymer polyacrylamide-g-poly(N-tert-butylacrylamide-r-N-phenylacrylamide).

[0028] The structure and properties of the hydrophobic polymer graft-modified polyacrylamide obtained were ...

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Abstract

The invention provides a hydrophobic polymer graft-modified acrylamide polymer and a preparation method thereof, which mainly solves the problems of poor temperature resistance, salt resistance, aging resistance and poor displacement effect of the general-purpose acrylamide polymer in the prior art. The present invention adopts a hydrophobic polymer to graft and modify the acrylamide polymer, and the general chemical formula is: P- g -X, wherein, P is polyacrylamide or acrylamide copolymer, X is a hydrophobic polymer with a molecular chain structure of homopolymerization, random copolymerization or block copolymerization, and the viscosity-average molecular weight of the graft compound ≥ The technical scheme of 17 million and its preparation method better solves this problem and can be used in industrial production and oil flooding of oil reservoirs.

Description

technical field [0001] The invention relates to the field of tertiary oil recovery, in particular to a hydrophobic polymer graft-modified acrylamide polymer and a preparation method thereof. Background technique [0002] The general performance requirements of water-soluble polymers in oil and gas field production mainly include: water solubility, viscosity increasing, suspension, shear thinning and thixotropy, stability and seepage characteristics to meet the requirements of oil and gas production engineering, etc. Although ultra-high molecular weight polyacrylamide can still enhance oil recovery at higher temperatures (such as 120°C) in an oxygen-free and divalent ion-free environment, water-soluble polymers commonly used in tertiary oil recovery still exist when they are used for oil displacement. many questions. For example, when the temperature is high, the hydrolysis of polyacrylamide is serious; when the formation temperature exceeds 75°C, as the formation temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02C08F120/54C08F220/54C08F293/00C08F2/38C09K8/588
Inventor 于志省夏燕敏
Owner CHINA PETROLEUM & CHEM CORP
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