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Hydrophobic associated polymer and preparation method thereof

A hydrophobic association and polymer technology, applied in the field of polymers, can solve problems such as rapid drop in solution viscosity, intolerance to salt, and performance degradation

Active Publication Date: 2016-06-08
SICHUAN GUANGYA POLYMER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 mechanical degradation during the pumping process, and the viscosity of the solution drops rapidly. In high-temperature oil reservoir environment, polyacrylamide is not resistant to salt, and is easily degraded at high temperature, resulting in a significant decline in various properties, and it is difficult to further overcome it on the basis of its existing molecular structure. Therefore, from It is imminent to modify the polymer molecular structure to improve its shear resistance, temperature resistance and salt resistance

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  • Hydrophobic associated polymer and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a method for preparing the above-mentioned hydrophobic association polymer. The method is to introduce sodium acrylate in the form of subsequent hydrolysis, including: under the action of an initiator, carry out a copolymerization reaction of an acrylamide monomer and a hydrophobic monomer, and hydrolyze Finally, hydrophobic association polymers are obtained; the hydrophobic monomer is allyl alkyl quaternary ammonium salt, acrylamide alkyl sulfonic acid and its sulfonate, alkylphenol polyoxyethylene acrylate and acrylic polyoxyethylene alkyl One or more of esters; 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 hydrophobic monomer The ratio of the number of moles of the monomer to the total number of moles of the monomer is (0.001~0.1):1.

[0037] Wherein, the hydrophobic monomer is the same as ...

Embodiment 1

[0056] Embodiment 1 aqueous solution polymerization method

[0057] Feed acrylamide and hexadecyl allyl dibromidetetramethylethylenediammonium at a molar ratio of 99.2:0.8, add them to a 5000mL beaker and dissolve them in pure water to prepare a monomer with a total mass concentration of 22%. Mix the solution, put the beaker in a 15°C water bath and keep warm until the solution temperature is 15°C, then add potassium persulfate / triethanolamine and 2,2'-azobis(2-methylpropionamidine) dihydrochloride V50 to compound Initiator initiates polymerization, wherein the mass ratio of potassium persulfate to triethanolamine is 1:1, the amount of potassium persulfate added is 0.015% of the total mass of monomers, the amount of V50 added is 0.008%, and the amount of added initiator accounts for the total monomer Concentration mass fraction. The polymerization reaction is carried out in an adiabatic environment, and a thermometer is inserted in the center of the reaction system to monitor...

Embodiment 2

[0063] Embodiment 2 micellar polymerization method

[0064] Add monomers and surfactants to a 5000mL beaker, wherein the acrylamide monomer and the hydrophobic monomer hexadecyl allyl dibromidetetramethylethylenediammonium are fed in a molar ratio of 99.2:0.8, and the hydrophobic unit Add sodium dodecylbenzene sulfonate to 4.5 times the volume molar concentration, then add quantitative pure water, stir well and evenly to prepare a mixed solution with a total monomer mass concentration of 22%, put the beaker in a 15°C water bath and keep warm until the solution After the temperature is 15°C, add potassium persulfate / triethanolamine and 2,2'-azobis(2-methylpropionamidine) dihydrochloride V50 composite initiator to initiate polymerization, wherein the mass ratio of potassium persulfate to triethanolamine is 1:1, the dosage of potassium persulfate is 0.015% of the total mass of the monomer, the dosage of V50 is 0.008%, and the dosage of the initiator accounts for the mass fraction...

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Abstract

The invention provides a hydrophobic associated polymer, as shown in formula (I), y = 0.001 to 0.1, z = 0.03 to 0.3, x + y + z = 1; A is a group formed by copolymerizing hydrophobic monomers; the hydrophobic monomer is selected from one or more of allylic alkyl quaternary ammonium salt, acrylamide alkyl sulfonic acid and sulfonate thereof, alkylphenol ethoxylate acrylate and polyoxyethylene alkyl acrylate. Compared with the prior art, the monomeric unit of acrylamide in the hydrophobic associated polymer can provide a hydrophilic group for the hydrophobic associated polymer; the monomeric unit of the hydrophobic monomer can provide a hydrophobic side group for the hydrophobic associated polymer, and hydrophobic groups gather in water due to a hydrophobic interaction to form a spatial network structure; the solubility of the hydrophobic associated polymer can be improved and the rheological properties of the polymer can be changed by the monomeric unit of sodium acrylate; under the combined action of three units, the temperature resistance, salt tolerance and shear resistance of the hydrophobic associated polymer can be improved.

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): C08F220/56C08F283/06C08F220/06C08F214/16C08F2/10C08F2/26C08F2/32
CPCC08F2/10C08F2/26C08F2/32C08F220/56C08F283/065C08F214/16C08F220/06
Inventor 郭拥军郭爱民李华兵毛慧斐冯春辉
Owner SICHUAN GUANGYA POLYMER CHEM
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