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Monodisperse ternary copolymer microspheres and preparation method thereof

A ternary copolymerization microsphere, monodisperse technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor controllability of particle size, difficulty in meeting production needs, unsatisfactory temperature resistance, etc. Achieve the effects of narrow particle size range, fast polymerization rate and mild reaction conditions

Inactive Publication Date: 2014-03-05
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The microspheres prepared by the above method have a wide particle size range, poor monodispersity, poor particle size controllability, and unsatisfactory temperature resistance, so it is difficult to meet different production requirements in actual oilfield production

Method used

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  • Monodisperse ternary copolymer microspheres and preparation method thereof
  • Monodisperse ternary copolymer microspheres and preparation method thereof
  • Monodisperse ternary copolymer microspheres and preparation method thereof

Examples

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preparation example Construction

[0050] According to the method for preparing the above-mentioned monodisperse terpolymeric microspheres provided by the present invention, it comprises the following steps:

[0051] (1) Add the mixed aqueous solution of acrylamide, functional monomer and crosslinking agent to the mixed oil solution of emulsifier and white oil, and after shearing and stirring, a mixed phase liquid is obtained;

[0052] (2) Under the condition of 68±2°C and stirring, add the aqueous solution of the initiator dropwise into the mixed phase liquid, and react for 3-5 hours to obtain the crude product of monodisperse ternary copolymerization microspheres;

[0053] (3) After centrifuging and washing the crude monodisperse terpolymer microspheres, the monodisperse ternary copolymer microspheres are obtained.

[0054] In the above preparation method, preferably, the speed of shear stirring in step (1) is 10000-22000 r / min.

[0055] In the above preparation method, preferably, the shear stirring in step...

specific Embodiment approach

[0059] According to a specific embodiment of the present invention, preferably, the above-mentioned preparation method comprises the following steps:

[0060] (1) Add the mixed aqueous solution of acrylamide, functional monomer and crosslinking agent to the mixed oil solution of emulsifier and white oil, and carry out intermittent shearing and stirring at a speed of 10000-22000r / min. The stirring time is 6min, after carrying out 3 times of shearing and stirring, a mixed phase liquid is obtained, and the mixed phase liquid is poured into a container equipped with a thermometer, an agitator, and a condensation reflux device;

[0061] (2) In a constant temperature water bath at 68±2°C and under stirring conditions of 600-750r / min, use a constant pressure funnel to drop the aqueous solution of the initiator into the mixed phase liquid at a rate of two drops / s, After reacting for 4h, the crude product of monodisperse ternary copolymerized microspheres was obtained;

[0062] (3) Af...

specific Embodiment 1

[0066] This example provides a kind of monodisperse ternary copolymerization microspheres, its raw material composition includes: acrylamide 6%, 2-acrylamide-2-methylpropanesulfonic acid 1.5%, N-vinylpyrrolidone 2.5% by weight percentage %, N,N'-methylenebisacryloyl 0.1%, potassium persulfate 0.1%, white oil 55%, Span 803.6%, Tween 601.2% and water 30%.

[0067] The preparation method of the monodisperse ternary copolymerization microsphere of the present embodiment comprises the following steps:

[0068] (1) Dissolve acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, N-vinylpyrrolidone and N,N'-methylenebisacryloyl in water according to the above weight percentage (the amount of water 25%), magnetically stirred until transparent to obtain a mixed aqueous solution;

[0069] (2) Dissolve Span 80 and Tween 60 in white oil, and magnetically stir until transparent to obtain a mixed oil solution;

[0070] (3) Potassium persulfate was dissolved in water (the amount of water wa...

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Abstract

The invention provides monodisperse ternary copolymer microspheres and a preparation method thereof. The monodisperse ternary copolymer microspheres consist of the following raw materials in percentage by weight: 5-15% of acrylamide, 4-6% of functional monomer, 0.05-1% of crosslinking agent, 0.1-0.3% of initiator, 40-60% of white oil, 3-5% of emulsifier and the balance of water. The preparation method of the monodisperse ternary copolymer microspheres comprises the following steps of adding the mixed aqueous solution of the acrylamide, functional monomer and crosslinking agent into a mixed oil solution of the emulsifier and white oil, and performing shear stirring to obtain mixed-phase liquid; dropwise adding the aqueous solution of the initiator into the mixed-phase liquid, and reacting to obtain a crude product of monodisperse ternary copolymer microspheres; performing centrifugal washing on the crude product to obtain the monodisperse ternary copolymer microspheres. The monodisperse ternary copolymer microspheres provided by the invention have excellent monodispersity and temperature resistance and can be applied to high-temperature oil reservoirs.

Description

technical field [0001] The invention relates to a monodisperse ternary copolymer microsphere and a preparation method thereof, in particular to a monodisperse ternary copolymer microsphere for oil field deep profile control and a preparation method thereof, belonging to the technical field of petroleum exploitation. Background technique [0002] As the oilfield enters a high water-cut or ultra-high water-cut development period, the problem of water flooding in the oilfield becomes more and more complicated, and the difficulty and requirements of water control and oil stabilization technologies such as profile control are getting higher and higher. The large number of polymeric microspheres used for deep profile control, good suspension dispersion, expansion, elasticity, good temperature resistance, and salinity resistance have made them widely used in actual oilfield production. At present, acrylamide-based copolymer microspheres are the most widely used. The preparation met...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F2/32C09K8/588
Inventor 杨子浩赵茜林梅钦党双敏
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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