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

A particle size distribution, polymer technology, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of unsatisfactory on-site implementation effect, unsatisfactory, high cost of polymer microspheres, etc., to improve the development effect , low cost, and the effect of improving water flooding recovery

Active Publication Date: 2020-12-01
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, particle size distribution monodisperse polymer microsphere and preparation and application thereof
  • Polymer gel, particle size distribution monodisperse polymer microsphere and preparation and application thereof
  • Polymer gel, particle size distribution monodisperse polymer microsphere and preparation and application thereof

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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 polymer gel, particle size distribution monodisperse polymer microspheres and preparation and application thereof. The particle size distribution monodisperse polymer microsphere is prepared by grinding the following raw material components by taking the total weight of the raw material components for preparing the particle size distribution monodisperse polymer microsphereas 100%: 20-40% of polymer gel and 60-80% of a dispersing agent, based on the total weight of the raw material components for preparing the polymer gel being 100%, the polymer gel is obtained by gelling the following raw material components: 99-98.6% of tap water; 0.6%-0.8% of a salt-resistant polymer; 0.3-0.4% of a curing agent; 0.1%-0.2% of a conditioning agent, wherein the sum of the weight percentages of the raw material components is 100%. The particle size distribution dispersity of the polymer microspheres is single, the particle size is micron-sized, and the problem that the particle size distribution range of the microspheres is wide in the existing polymer microsphere preparation process can be effectively solved.

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 Applications(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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