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A kind of magnetic slow expansion particle and preparation method thereof

A technology of volume expansion granules and magnetism, which is applied in the field of magnetic slow expansion granules and its preparation, can solve the problems of unfavorable deep well control and flooding, and achieve the effect of enhancing the compression resistance

Inactive Publication Date: 2021-07-16
NANTONG KEYI CHEM
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0003] At present, there are many body-swelling particles and water-swelling bodies, which swell when they meet water, and reach the maximum expansion ratio within 24 hours. They can be used in near-wellbore formations, which are not conducive to deep well control and flooding. The particle size of body-swelling particles is the same as The water blocking effect is directly related. There are water-absorbing particles as small as nanometers and large particles as large as millimeters in the market.

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  • A kind of magnetic slow expansion particle and preparation method thereof

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preparation example Construction

[0039] A method of preparing magnetic expanded expanded particles, wherein the following steps:

[0040] a) Preparation of S-shaped bulk particles

[0041] (1) According to the weight ratio raw material, the deionized water is added to the first dissolution, and acrylamide, S type function monomer, acrylate-2-hydroxyethyl acrylate, methyl methacrylate, nonionic substance , Inorganic matter and crosslinking agents are stirred and dissolved to give the first mixture;

[0042] (2) Adjust the pH of the first mixture to 5.5 ~ 6.5, the control temperature is 25 ~ 27 ° C, then add it to the reaction kettle, and 0.1 to 1.0% by weight of catalyst V50, 0.3% by weight in nitrogen protection is sequentially added. % Of the potassium sulfate and 0.5 to 1.5 wt% sodium bisulfite, mixed with nitrogen gas in the reactor until the system is constant, and the blown nitrogen is stopped, and the second mixture is obtained;

[0043] (3) The second mixture was incubated at 85 to 95 ° C for 5 hours to obt...

Embodiment 1

[0053] Synthesis of S-shaped bulk particles: according to the weight ratio raw material, wherein the raw material ratio is: acrylamide monomer 10 wt%, sodium styrene sulfonate 3 wt%, acrylic-2-hydroxyethyl ester 10 wt%, methyl methacrylic acid. 10 wt%, starch 10 wt%, talc powder 10 wt%, N, N methylene acrylamide 0.5% by weight, deionized water 46.5 wt%. At room temperature, the amount of deionized water in the formulation is added to the dissolution kettle equipped with a stirring device, and acrylamide, sodium styrene sulfonate, acrylic-2-hydroxyethyl acrylate, methyl methacrylate are slowly added. , Starch, talcum powder and N, N methylene acrylamide stir well; adjust the pH of the dissolved solution to 5.5; adjust the temperature of the dissolved solution to 25 ° C; transfer all the dissolution to the reactor, in the liquid in the reaction kettle Blowing nitrogen for 15 minutes; catalyst V50 (1.0% by weight), potassium sulfate (1.0% by weight), sodium sulfite (1.5 wt%), and con...

Embodiment 2

[0057] Synthesis of S-shaped bulk particles: according to the weight ratio raw material, wherein the raw material ratio is: acrylamide monomer 10 wt%, sodium styrene sulfonate 3 wt%, acrylic-2-hydroxyethyl ester 10 wt%, methyl methacrylic acid. The esters 10 wt%, the starch 10 wt%, talc 10 wt%, divinylbenzene 0.5% by weight, deionized water 46.5 wt%. At room temperature, the amount of deionized water in the formulation is added to the dissolution kettle equipped with a stirring device, and acrylamide, sodium styrene sulfonate, acrylic-2-hydroxyethyl acrylate, methyl methacrylate are slowly added. , Starch, talc, and divinylbenzene mixed well; adjust the pH of the dissolved liquid to 6; adjust the temperature of the dissolved solution to 26 ° C; transfer all the dissolved fluid to the reaction kettle, blow nitrogen gas in the liquid in the reactor for 15 minutes Catalyst V50 (1.0% by weight), potassium sulfate (1.0% by weight), sodium sulfate (1.5 wt%), and continued blown nitrogen...

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Abstract

The invention discloses a kind of magnetic swelling retarding granules, which comprise 25-75wt% of S-type bulky granules and 25-75wt% of N-type bulky granules. The magnetic-like slow-expansion granules of the present invention contain S-type and N-type monomers. The temperature and salt resistance of the two types of monomers are better than those of ordinary bulk granules, and can still achieve slow-expansion and high-salinity conditions under high temperature and high salinity conditions. Attract aggregate performance.

Description

Technical field [0001] The present invention relates to the field of oilfield modulsulants, and more particularly, a magnetic spun expansion-generating granule and a preparation method thereof. Background technique [0002] In the oil mining process, there will be a large amount of water to produce, and the uniform formation of the polymer drive, the water-driven drive, etc. The influence of the wave and coefficient of the water drive is more serious, and it is necessary to achieve higher crude oil recovery, only by improvement. , More efficient deep ancillation technology, effectively improve the non-homogeneity of the reservoir to increase the wavefront of the adjustment, so that the crude oil recovery rate of injection of water in the water injection stage can be significantly improved. In the development of the water field, the crack reservoir forms an inefficient circulation channel of injection water, resulting in excessive production and rapid decline in oil production. By...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508C08F251/00C08F220/56C08F220/20C08F220/14
Inventor 唐菲利刘雅红柏清郝栩麟
Owner NANTONG KEYI CHEM
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