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A heat stabilizer for polymers used in high-temperature resistant high-salt oilfields and its preparation method and application

A heat stabilizer and polymer technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of human health hazards, slow preparation speed, and inability to effectively reduce the concentration of polymer systems, and achieve saving cost effect

Active Publication Date: 2018-10-12
GUANGRAO LIUHE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What are the disadvantages and deficiencies of the present invention: (1) Poor temperature and salt resistance; (2) The use concentration of the polymer system cannot be effectively reduced; (3) The cost is high, the preparation method consumes a lot of energy, and the preparation speed is slow; (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 4.2, ammonium sulfate 23, peracetic acid 2.8 and deionized water 960.

[0022] Preparation :

[0023] (a) Add calcium peroxide to deionized water at 15°C and stir evenly at 50 rpm to prepare aqueous solution A;

[0024] (b) Add ammonium sulfate to solution A at 16°C, and stir evenly at 120 rpm to obtain solution B;

[0025] (c) Add peracetic acid 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 sulfate 20, peracetic acid 2 and deionized water 920.

[0028] Preparation :

[0029] (a) Add calcium peroxide to deionized water at 16°C and stir evenly at 100 rpm to prepare aqueous solution A;

[0030] (b) Add ammonium sulfate to solution A at 15°C, and stir evenly at 100 rpm to obtain solution B;

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

Embodiment 3

[0033] Accurately weigh the raw materials (kg): calcium peroxide 5, ammonium sulfate 23, peracetic acid 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) Add ammonium sulfate to solution A at 20°C, and stir evenly at 110 rpm to obtain solution B;

[0037] (c) Add peracetic acid 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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PUM

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Abstract

The invention discloses a high-temperature-resisting and high-salt-resisting thermal stabilizer of a polymer for an oil field as well as a preparation method and application of the high-temperature-resisting and high-salt-resisting thermal stabilizer. The thermal stabilizer is prepared from the following components in parts by weight: 3 to 5 parts of calcium peroxide, 20 to 30 parts of ammonium sulfate, 2 to 3 parts of peracetic acid and 900 to 1000 parts of de-ionized water. All the components are uniformly mixed to obtain the thermal stabilizer and the thermal stabilizer is used for oil displacement or plugging control of the polymer of the oil field. The thermal stabilizer disclosed by the invention has a high viscosity retention rate under high-temperature and high-salt conditions, and the concentration of the polymer is greatly reduced when the thermal stabilizer is utilized; the preparation method is simple and a preparation speed is rapid; the cost is relatively low, and the strength and stability of the polymer can be improved very well.

Description

technical field [0001] The invention relates to an oilfield chemical agent and a preparation method thereof, in particular to a heat stabilizer for a high-temperature-resistant high-salt oilfield polymer, a preparation method and application thereof. Background technique [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 effective time of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/26C08L5/00C08K3/22C08K3/30C08K5/09C09K8/44C09K8/588
CPCC08K3/22C08K3/30C08K5/09C08K2003/2206C08K2003/3045C09K8/44C09K8/588C08L33/26C08L5/00
Inventor 王敏
Owner GUANGRAO LIUHE CHEM CO LTD
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