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Preparation method for polymer cross-linking agent

A production method and technology of a cross-linking agent are applied in the directions of drilling compositions, chemical instruments and methods, etc., and can solve the problems of unfavorable fracturing construction, ineffective provocation, and poor jelly hanging state, etc. The effect of increasing the cross-linking stability of the jelly, reducing the harm and high cross-linking strength

Inactive Publication Date: 2017-11-17
如皋市玉辉助剂厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When this kind of cross-linking agent is applied to polymer fracturing fluid containing carboxylic acid groups, the jelly formed is not in a good hanging state, and the jelly can not be picked up effectively with glass rods, which is not conducive to fracturing construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 150kg of tartaric acid and 590kg of water into a reactor with a volume of 2 square meters, stir for three minutes, slowly add 40kg of sodium bicarbonate, maintain the reaction temperature at 35°C, stir until completely dissolved, then add 40kg of aluminum trichloride and 70kg of oxychloride Zirconium, stirred for 3 hours, added 100kg of triethanolamine, 10kg of glyoxal, and stirred at a constant temperature of 45°C for 3 hours to obtain the product.

Embodiment 2

[0032] Add 220kg of citric acid and 335kg of water into a reactor with a capacity of 2 square meters, stir for three minutes, slowly add 60kg of sodium hydroxide, maintain the reaction temperature at 45°C, stir until completely dissolved, then add 80kg of aluminum trichloride and 120kg of oxygen Zirconium chloride, stirred for 3 hours, added 150kg of triethanolamine, 35kg of glyoxal, and stirred at a constant temperature of 55°C for 3 hours to obtain the product.

Embodiment 3

[0034] Add 300kg of lactic acid and 140kg of water into a reactor with a capacity of 2 square meters, stir for three minutes, slowly add 80kg of potassium hydroxide, maintain the reaction temperature at 55°C, stir until completely dissolved, then add 100kg of aluminum trichloride and 150kg of oxychloride Zirconium, stirred for 3 hours, added 180kg of triethanolamine, 50kg of glyoxal, and stirred at a constant temperature of 65°C for 3 hours to obtain the product.

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Abstract

The invention relates to a method for preparing a polymer cross-linking agent. The cross-linking agent includes the following components in weight percentage: organic acid: 15-30%, inorganic base: 4-8%, organic amine: 10-18%, three Valence metal ion salt: 4-10%, tetravalent zirconium salt: 7-15%, aldehyde: 1-5%, and the balance is water. The cross-linking agent of the present invention has a controllable cross-linking time of 10-180s, high cross-linking strength, and the temperature resistance of the cross-linked jelly reaches 150°C; it does not contain phenol, which reduces the harm to the environment; Synthesized under certain conditions, and the finished product is produced at one time, without secondary mixing; the cross-linking agent contains triethanolamine, which greatly increases the gel cross-linking stability of the cross-linking agent.

Description

technical field [0001] The invention relates to a preparation method of a polymer crosslinking agent. Background technique [0002] Fracturing technology is one of the main measures to increase production in the middle and late stages of oilfield development, and the performance of the fracturing fluid system directly affects the effect of fracturing. At present, guar gum fracturing fluid is still the most widely used fracturing fluid system in my country. Since the raw material price of hydroxypropyl guar gum (grade 1) rose from 18,300 yuan / ton in 2010 to 158,000 yuan / ton in 2012, the cost of fracturing was greatly increased and the promotion of fracturing technology was restricted. The new polymer fracturing fluid can replace conventional guar gum fracturing fluid due to its advantages of low cost, low friction, low residue, easy flowback, little damage to the formation, and long storage time. [0003] At present, polyacrylamide and its matching cross-linking agents are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/88
CPCC09K8/685C09K8/887
Inventor 陈修玲
Owner 如皋市玉辉助剂厂
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