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Polymer gel, monodisperse polymer microsphere with particle size distribution and its preparation and application

A particle size distribution and polymer technology, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of unsatisfactory on-site implementation effect, increased cost of polymer microspheres, unsatisfactory and other problems, and achieves low cost, The effect of improved dispersion and simple preparation process

Active Publication Date: 2022-05-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the wide range of microsphere particle size distribution, the relationship between formation pore throat size and microsphere particle size does not match, the field implementation effect is not ideal, and it cannot meet the requirements of high water-cut oil field plugging and high-water-bearing formation control and flooding technology
At the same time, most of the existing polymer microsphere preparation methods use emulsion polymerization, precipitation polymerization, etc., and a large amount of emulsifiers, such as Spans, Tweens, etc., and oil-soluble dispersants, such as kerosene and white oil, are used in the preparation of microspheres. etc., the cost of the prepared polymer microspheres is greatly increased

Method used

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  • Polymer gel, monodisperse polymer microsphere with particle size distribution and its preparation and application
  • Polymer gel, monodisperse polymer microsphere with particle size distribution and its preparation and application
  • Polymer gel, monodisperse polymer microsphere with particle size distribution and its preparation and application

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Effect test

Embodiment 1

[0055]This embodiment provides a monodisperse polymer microsphere with particle size distribution for control and drive, wherein the preparation method of the monodisperse polymer microsphere with particle size distribution for control and drive comprises the following steps:

[0056] (1) Preparation of polymer gel:

[0057] Add successively the tap water of 99 parts by weight, the salt-resistant polymer (molecular weight is 8,000,000, degree of hydrolysis is 12%), the salicylaldehyde of 0.3 part by weight and the ammonium sulfate of 0.1 part by weight in tool plugged jar , after high-speed stirring to make it mix and dissolve, the resulting mixture was placed in a drying oven whose temperature was adjusted to 80° C., and the polymer gel was prepared after gelling, and its viscoelastic modulus G” was 8500 mPa·s.

[0058] (2) Preparation of monodisperse polymer microspheres with particle size distribution for adjusting and driving:

[0059] In the colloid mill, add 20 parts by...

Embodiment 2

[0061] This embodiment provides a monodisperse polymer microsphere with particle size distribution for control and drive, wherein the preparation method of the monodisperse polymer microsphere with particle size distribution for control and drive comprises the following steps:

[0062] (1) Preparation of polymer gel:

[0063] Add successively the tap water of 99 parts by weight, the salt-resistant polymer (molecular weight is 8,000,000, degree of hydrolysis is 12%), the salicylaldehyde of 0.3 part by weight and the ammonium sulfate of 0.1 part by weight in tool plugged jar , after high-speed stirring to make it mix and dissolve, the resulting mixture was placed in a drying oven whose temperature was adjusted to 80° C., and the polymer gel was prepared after gelling, and its viscoelastic modulus G” was 8500 mPa·s.

[0064] (2) Preparation of monodisperse polymer microspheres with particle size distribution for adjusting and driving:

[0065] In the colloid mill, add 20 parts b...

Embodiment 3

[0068] This embodiment provides a monodisperse polymer microsphere with particle size distribution for control and drive, wherein the preparation method of the monodisperse polymer microsphere with particle size distribution for control and drive comprises the following steps:

[0069] (1) Preparation of polymer gel:

[0070] Add successively the tap water of 99 parts by weight, the salt-resistant polymer (molecular weight is 8,000,000, degree of hydrolysis is 12%), the salicylaldehyde of 0.3 part by weight and the ammonium sulfate of 0.1 part by weight in tool plugged jar , after high-speed stirring to make it mix and dissolve, the resulting mixture was placed in a drying oven whose temperature was adjusted to 80° C., and the polymer gel was prepared after gelling, and its viscoelastic modulus G” was 8500 mPa·s.

[0071] (2) Preparation of monodisperse polymer microspheres with particle size distribution for adjusting and driving:

[0072] Add 30 parts by weight of the polym...

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Abstract

The invention provides a polymer gel, a monodisperse polymer microsphere with a particle size distribution, and its preparation and application. The total weight of the raw material components used to prepare the monodisperse polymer microsphere with a particle size distribution is 100%. It is obtained by grinding the following components: polymer gel 20-40% and dispersant 60-80%; based on the total weight of the raw material components used to prepare the polymer gel as 100% , which is obtained by gelling raw material components including: tap water 99-98.6%; salt-resistant polymer 0.6-0.8%; curing agent 0.3-0.4%; regulator 0.1-0.2%; and The sum of the weight percentages of each raw material component is 100%. The particle size distribution of the polymer microsphere has a single dispersity and the particle size is in the order of microns, which can effectively solve the problem of a wide range of microsphere particle size distribution existing in the preparation process of the existing polymer microsphere.

Description

technical field [0001] The invention relates to a polymer gel, a monodisperse polymer microsphere with particle size distribution and its preparation and application, and belongs to the technical field of oil recovery in the oilfield development process. Background technique [0002] In the late stage of water injection development in old oilfields, the single-layer breakthrough of injected water caused by long-term water injection causes serious interlayer contradictions and interlayer interference. The technology of deep liquid flow diversion control and flooding is an important means to solve the low-efficiency and ineffective circulation of water injection in water flooding development oilfields and improve the recovery rate of water flooding development. [0003] In recent years, polymer microspheres have played a very important role in stabilizing oil and controlling water in mature oilfields in the later stage of development, but there are still some problems in the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L101/00C08K5/13C09K8/508
CPCC08K5/13C09K8/5045C09K8/508C08L101/00
Inventor 刘平德魏发林熊春明张松
Owner PETROCHINA CO LTD
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