Hydrophobic associated polymer and preparation method thereof

A hydrophobic association and polymer technology, applied in the field of polymers, can solve the problems of rapid drop in solution viscosity, large dosage, and damage to the environment in the formation

Inactive Publication Date: 2016-03-23
SICHUAN GUANGYA POLYMER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The output and quality of natural polymers are limited by seasons and regions, and the performance stability cannot be guaranteed. Compared with synthetic polymers, they are used in large amounts and are easy to biodegrade. Higher residues will also seriously damage the environment in the formation, giving Later development brought many new problems
At present, the most widely used synthetic polymer is polyacrylamide. Although its performance in all aspects can meet the construction requirements, it is easy to cause me...

Method used

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  • Hydrophobic associated polymer and preparation method thereof
  • Hydrophobic associated polymer and preparation method thereof
  • Hydrophobic associated polymer and preparation method thereof

Examples

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preparation example Construction

[0037] The present invention also provides a method for preparing the above-mentioned hydrophobic association polymer. This method is to introduce acrylic acid ions in the form of subsequent hydrolysis, including: under the action of an initiator, acrylamide monomers, hydrophobic monomers and functional monomers are Copolymerization reaction, after hydrolysis to obtain a hydrophobic association polymer; the hydrophobic monomer is selected from allyl alkyl quaternary ammonium salt and its derivatives, acrylamide alkyl sulfonic acid and its sulfonate, alkylphenol polyoxyethylene One or more of acrylate and polyoxyethylene alkyl acrylate; the number of carbon atoms of the alkyl group in the allyl alkyl quaternary ammonium salt and acrylamide alkyl sulfonic acid and its sulfonate is independently Less than or equal to 20; the functional monomer is selected from one or more of sulfonic acid derivatives containing terminal alkenyl groups and their sulfonate derivatives and heterocycl...

Embodiment 1

[0058] Embodiment 1 micellar polymerization method

[0059] Feed acrylamide monomer, functional monomer AMPS and hydrophobic monomer hexadecylphenol polyoxyethylene acrylate (polyoxyethylene repeating unit is 15) at a molar ratio of 96.7:3:0.3, and add them to a 5000mL beaker for use Dissolve pure water to prepare a mixed solution with a total monomer concentration of 23wt%. Add sodium dodecylbenzenesulfonate at a ratio of 24 times the molar concentration of hydrophobic monomers and stir well. Put the beaker in a -20°C water bath to keep warm After the temperature of the solution is -5°C, add ammonium persulfate and sodium bisulfite composite initiator to initiate polymerization, wherein the mass ratio of ammonium persulfate to sodium bisulfite is 5:4, and the amount of ammonium persulfate added is 2% of the monomer mass. 0.002wt%; the polymerization reaction is carried out under adiabatic conditions, and a thermometer is inserted in the center of the reaction system to monito...

Embodiment 2

[0062] Embodiment 2 inverse microemulsion polymerization

[0063] Sodium acrylate monomer, acrylamide monomer, functional monomer AMPS and hydrophobic monomer hexadecylphenol polyoxyethylene acrylate (polyoxyethylene repeating unit is 15) were added in the molar ratio 15:81.7:3:0.3 Fully dissolve in deionized water, and this solution is used as the water phase; add emulsifier span-80 to kerosene and stir until fully dissolved, and use this solution as the oil phase. Under high-speed stirring, the aqueous phase solution was added to the oil phase so that the mass concentration of the emulsifier was 15% of the monomer mass, emulsified for 20 minutes, and transferred to a 5000mL beaker with a total monomer concentration of 23wt%. Add ammonium persulfate and sodium bisulfite composite initiator to initiate polymerization when the emulsion is kept at -5°C, wherein the mass of ammonium persulfate is 0.005% of the monomer mass, and the mass ratio of ammonium persulfate to sodium bisu...

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Abstract

The invention provides a hydrophobic associated polymer, which comprises the following four repetitive units represented in the description. In the formula, y=0.001 to 0.02, z=0.01 to 0.12, m=0.08-0.3, and x+y+z+m=1; the A represents a monomer unit of hydrophobic monomer, which can be one or more of allyl alkyl quaternary ammonium salt, acrylamide alkyl sulfonic acid, acrylamide alkyl sulfonate, alkyl phenol polyoxyethylene acrylate, and polyoxyethylene alkyl acrylate; the D represents a monomer unit of functional monomer, and the viscosity average molecular weight of the hydrophobic associated polymer is in a range of 30 million to 45 million. Compared with the prior art, the provided acrylamide monomer unit of the hydrophobic associated polymer can provide hydrophilic groups; the monomer unit of hydrophobic monomer can provide hydrophobic side groups, the provided polymer can construct spatial network in water and provides viscosity for the solution; monomer unit of acrylic acid ions can improve the solubility of polymer; and the introduction of monomer unit of functional monomer can improve the temperature resistant and salt resistant performance of the polymer.

Description

technical field [0001] The invention belongs to the technical field of polymers, in particular to a hydrophobic association polymer and a preparation method thereof. Background technique [0002] In oilfield development and application technology, it is usually necessary to modify the formation environment, etc., and it is necessary to use certain performance fluids for mass transfer and transportation. By injecting these fluids into the formation, certain substances will be brought into the formation to act to transform the formation environment. To achieve the purpose of oil and gas field development and increase production. At the same time, related application technologies also require these fluids to have certain specific properties, such as thickening, viscoelasticity, drag reduction, permeability, and improved mobility ratio. Among them, the most commonly used fluid is aqueous solution, which has the advantages of wide source, economy, and convenient construction. By...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F220/56C08F220/58C08F226/02
CPCC08F220/56C08F290/062C08F220/585C08F226/02
Inventor 郭拥军张新民胡俊蔡术威毛慧斐
Owner SICHUAN GUANGYA POLYMER CHEM
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