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Supramolecular polymer based on multiple intermolecular acting forces and preparation method thereof

A supramolecular polymer, intermolecular force technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance, salt resistance and shear recovery, and achieve increased water solubility, improved Temperature resistance, the effect of increasing molecular rigidity

Active Publication Date: 2017-12-12
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Another purpose of the present invention is to provide a supramolecular polymer based on multiple intermolecular forces to address the disadvantages of poor temperature and salt resistance and shear recovery of polymers used in oil displacement in the prior art

Method used

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  • Supramolecular polymer based on multiple intermolecular acting forces and preparation method thereof
  • Supramolecular polymer based on multiple intermolecular acting forces and preparation method thereof
  • Supramolecular polymer based on multiple intermolecular acting forces and preparation method thereof

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Embodiment 1

[0037] A method for preparing a supramolecular polymer based on multiple intermolecular forces, comprising the steps of:

[0038] (1) Add acrylamide, acrylic acid, maleic anhydride modified β-cyclodextrin and methacryloyl chloride modified alkylphenol polyoxyethylene ether in deionized water to control the total amount of each reaction monomer in the reaction liquid system. The mass percentage is 20%, of which, 13% of acrylamide, 6% of acrylic acid, 0.4% of maleic anhydride modified β-cyclodextrin, 0.6% of methacryloyl chloride modified alkylphenol polyoxyethylene ether, stir well and use Sodium hydroxide adjusts the pH value of the system to 6, and stirs until the solution is clear and transparent;

[0039] (2) Nitrogen gas was passed through the solution obtained in step (1) for 30 minutes to remove oxygen, a redox initiation system composed of persulfate and sodium bisulfite was added, and then the temperature was raised to 30-50°C for 4-7 hours to obtain a polymer Colloid...

Embodiment 2

[0042] A method for preparing a supramolecular polymer based on multiple intermolecular forces, comprising the steps of:

[0043] (1) Add acrylamide, acrylic acid, maleic anhydride modified β-cyclodextrin and methacryloyl chloride modified alkylphenol polyoxyethylene ether in deionized water to control the total amount of each reaction monomer in the reaction liquid system. The mass percentage is 20%, of which, 16.7% of acrylamide, 3% of acrylic acid, 0.1% of maleic anhydride modified β-cyclodextrin, 0.2% of methacryloyl chloride modified alkylphenol polyoxyethylene ether, stir well and use The sodium hydroxide solution adjusts the pH value of the system to 7, and stirs until the solution is clear and transparent;

[0044] (2) In the solution that step (1) obtains, pass nitrogen gas 30min deoxygenation, add the oxidation-reduction initiation system that persulfate and sodium bisulfite form, add-on is 0.1% of total monomer mass, persulfate and sodium bisulfite The molar ratio ...

Embodiment 3

[0047] A method for preparing a supramolecular polymer based on multiple intermolecular forces, comprising the steps of:

[0048] (1) Add acrylamide, acrylic acid, maleic anhydride modified β-cyclodextrin and methacryloyl chloride modified alkylphenol polyoxyethylene ether in deionized water to control the total amount of each reaction monomer in the reaction liquid system. The mass percentage is 20%, of which, 15% of acrylamide, 4% of acrylic acid, 0.4% of maleic anhydride modified β-cyclodextrin, 0.6% of methacryloyl chloride modified alkylphenol polyoxyethylene ether, stir well and use Strong sodium oxide solution adjusts the pH value of the system to 7-8, and stirs until the solution is clear and transparent;

[0049] (2) In the solution that step (1) obtains, pass nitrogen gas 30min deoxygenation, add the redox initiation system that persulfate and sodium bisulfite form, the addition is 0.5% of total monomer mass, persulfate and sodium bisulfite The molar ratio of sodium...

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Abstract

The invention discloses a supramolecular polymer based on multiple intermolecular acting forces. The supramolecular polymer is prepared by a reaction monomer acrylamide, crylic acid, maleic anhydride modified beta-cyclodextrin and methylacryloyl chloride modified alkylphenol polyoxyethylene ether through polymerization reaction. The preparation method comprises the steps that 1, the acrylamide, the crylic acid, the maleic anhydride modified beta-cyclodextrin and the methylacryloyl chloride modified alkylphenol polyoxyethylene ether are added into deionized water, the pH value of a system is regulated to 6-8 after even stirring; 2, nitrogen is introduced to the solution obtained in the step 1 for 30 minutes to remove oxygen, a redox initiation system prepared from persulfate and sodium hydrogen sulfite is added, heating is performed to 30-50 DEG C, and reaction is performed for 4-7 hours to obtain a polymer colloid, namely the supramolecular polymer. The supramolecular polymer is used for oil field displacement, the viscosity, heat resistance and salt tolerance properties and shear restoration of the supramolecular polymer are remarkably improved, and the supramolecular polymer has a higher use value.

Description

technical field [0001] The invention belongs to the technical field of oil-displacing agents, and in particular relates to a supramolecular polymer based on multiple intermolecular forces used in oilfield chemical flooding to enhance oil recovery and a preparation method thereof. Background technique [0002] Polymers commonly used in oil fields, such as partially hydrolyzed polyacrylamide (HPAM) and comb polymer (KYPAM), have poor temperature resistance, sensitivity to metal ions, and poor shear recovery, which cannot well meet the reservoir conditions Requirements for enhanced oil recovery under polymer flooding. Supramolecular polymers have good application prospects in oil fields due to their unique solution properties: good viscosity increasing, temperature and salt resistance, excellent thixotropy and high viscoelasticity. [0003] At present, the way to improve the performance of polymers is mainly to introduce functional monomers to change the configuration of polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F290/06C08F220/56C08F220/06C09K8/588
CPCC08F251/00C08F290/062C09K8/588C08F220/56C08F220/06
Inventor 杜代军蒲万芬刘锐
Owner SOUTHWEST PETROLEUM UNIV
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