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A heat stabilizer for polymers used in high-temperature and high-salt oil flooding, its preparation method and application

A technology of heat stabilizer and polymer, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of human health hazards, high energy consumption and high cost of the preparation method, and achieve the effect of saving costs.

Active Publication Date: 2018-06-29
HENAN ZHENGJIA ENERGY ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What disadvantages and deficiencies exist in the present invention: (1) poor temperature and salt resistance; (2) can not effectively reduce the use concentration of the polymer system; (3) high cost, high energy consumption and slow preparation speed of the preparation method; (4) ) Formaldehyde has strong carcinogenic and cancer-promoting effects, and long-term use will cause harm to human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Accurately weigh raw materials (kg): calcium peroxide 4, ammonium chloride 25, hydrogen peroxide 2.5 and deionized water 950.

[0022] Preparation:

[0023] (a) Calcium peroxide was added to deionized water at 15°C, and stirred evenly at 50 rpm to prepare aqueous solution A;

[0024] (b) Weigh ammonium chloride at 16°C and add it to solution A, and stir evenly at 120 rpm to obtain solution B;

[0025] (c) Add hydrogen peroxide to solution B at 18°C, and stir for 25 minutes at a stirring speed of 420 rpm to obtain the product.

Embodiment 2

[0027] Accurately weigh raw materials (kg): calcium peroxide 3, ammonium chloride 20, hydrogen peroxide 2 and deionized water 920.

[0028] Preparation:

[0029] (a) Calcium peroxide was added to deionized water at 16°C, and stirred evenly at 100 rpm to prepare aqueous solution A;

[0030] (b) Weigh ammonium chloride at 15°C and add it to solution A, and stir evenly at 100 rpm to obtain solution B;

[0031] (c) Add hydrogen peroxide to solution B at 16°C, and stir at a stirring speed of 300 rpm for 20 minutes to obtain the product.

Embodiment 3

[0033] Accurately weigh raw materials (kg): calcium peroxide 5, ammonium chloride 23, hydrogen peroxide 2.3 and deionized water 900.

[0034] Preparation:

[0035] (a) Add calcium peroxide to deionized water at 20°C, and stir evenly at 60 rpm to prepare aqueous solution A;

[0036] (b) Weigh ammonium chloride at 20°C and add it to solution A, and stir evenly at 110 rpm to obtain solution B;

[0037] (c) Add hydrogen peroxide to solution B at 15°C, and stir for 23 minutes at a stirring speed of 350 rpm to obtain the product.

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Abstract

The invention discloses a high-temperature-resistant and high-salt-resistant heat stabilizer for a polymer used for oil flooding, and a preparation method and application thereof. The heat stabilizer is composed of the following components in parts by weight: 3 to 5 parts of calcium peroxide, 20 to 30 parts of ammonium chloride, 2 to 3 parts of hydrogen peroxide and 900 to 1000 parts of deionized water. The heat stabilizer is prepared from the above-mentioned components by uniform mixing and used for polymer flooding in an oil field. The heat stabilizer provided by the invention has high viscosity retention rate under the conditions of high temperature and high salt; the use of the heat stabilizer greatly reduces the concentration of the polymer; and the preparation method provided by the invention is simple, has rapid preparation speed and low cost, and can well improve the strength and the stability of the polymer. Thus, the heat stabilizer can be extensively applied in a field test of polymer flooding in high-temperature and high-salt oil reservoir.

Description

technical field [0001] The invention relates to an oil field chemical agent and a preparation method thereof, in particular to a thermal stabilizer of a high-temperature-resistant high-salt polymer for oil flooding, a preparation method and application thereof. technical background [0002] After the polymer system commonly used in oil field chemical flooding is injected into the formation, because the polymer used in it is generally low in viscosity and low in molecular weight, once the polymer is degraded by the influence of temperature, the crosslinking degree of the crosslinked polymer will decrease , and the spatial network structure formed at the same time is easy to loose, resulting in a decrease in crosslinking strength and stability time, which affects the effect of profile control and water shutoff. In order to improve the thermal stability of the polymer system used for plugging, improve the cross-linking effect of the cross-linking system, and increase the effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/18C08K3/16C08L33/26C08L5/00C09K8/588
CPCC08K2201/014C08L5/00C08L33/26C08L2201/08C09K8/588C08K3/18C08K3/16
Inventor 丁倩杨慧海连阳阳夏伟孙艳霞许丛丛邹晓东钟伟王振丽徐秋石柳琳马景路
Owner HENAN ZHENGJIA ENERGY ENVIRONMENTAL PROTECTION CO LTD
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