Polyethylene glycol diazacyclo compound, preparation method and application

A technology of diaza rings and polyethylene glycol, applied in chemical instruments and methods, drilling compositions, organic chemistry, etc., can solve problems such as aggravating the damage of low permeability oil layer permeability, and achieve excellent water washing resistance , prevent the migration of clay particles, high yield effect

Active Publication Date: 2018-08-24
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is that cationic polymer clay stabilizers with large relative molecular weight tend to aggravate the damage to the permeability of low-permeability oil layers.

Method used

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  • Polyethylene glycol diazacyclo compound, preparation method and application
  • Polyethylene glycol diazacyclo compound, preparation method and application
  • Polyethylene glycol diazacyclo compound, preparation method and application

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Embodiment 1

[0033] The preparation method of described polyethylene glycol diaza heterocyclic compound comprises the following steps:

[0034] (1) Weigh PEG150 and pyridine at a molar ratio of 1:2 and dissolve them in a three-necked flask filled with toluene. The volume of the toluene is twice the sum of the volumes of PEG150 and pyridine. Keep the three-necked flask at a constant temperature of 50°C After 10min, SOCl will be dissolved 2 The toluene was slowly added dropwise to the three-necked flask, in which SOCl 2 The molar ratio to PEG150 is 2:1, the volume of toluene to SOCl 2 In the same way, control the dropping rate to 10-15 seconds / drop. After the dropping is completed, continue to react for 24 hours. After the reaction is completed, cool to room temperature, add 1mol / L hydrochloric acid solution to the reaction solution, and adjust to neutral or weakly acidic. Separation, take the upper organic solution, and remove the toluene by rotary evaporation to obtain a transparent oily...

Embodiment 2

[0038] The preparation method of described polyethylene glycol diaza heterocyclic compound comprises the following steps:

[0039] (1) Weigh PEG150 and pyridine at a molar ratio of 1:3 and dissolve them in a three-necked flask filled with toluene. The volume of the toluene is three times the sum of the volumes of PEG150 and pyridine. Keep the three-necked flask at 80°C for 10 minutes. will be dissolved with SOCl 2 The toluene was slowly added dropwise to the three-necked flask, in which SOCl 2 The molar ratio with PEG150 is 3:1, the volume of toluene is SOCl 22 times the volume, control the rate of addition to 10-15 seconds / drop, continue to react for 16 hours after the completion of the drop, after the completion of the reaction, cool to room temperature, add 1mol / L hydrochloric acid solution to the reaction solution, adjust to neutral or Weakly acidic, liquid separation, take the upper organic solution, and remove the toluene by rotary evaporation to obtain a transparent o...

Embodiment 3

[0043] The preparation method of the polyethylene glycol diaza heterocyclic compound comprises the following steps:

[0044] (1) Weigh PEG150 and pyridine at a molar ratio of 1:2.5 and dissolve them in a three-necked flask filled with toluene. The volume of the toluene is twice the sum of the volumes of PEG150 and pyridine, and keep the three-necked flask at 70°C for 10 minutes. will be dissolved with SOCl 2 The toluene was slowly added dropwise to the three-necked flask, in which SOCl 2 The molar ratio with PEG150 is 2.5:1, the volume of toluene is SOCl 2 double the volume, control the dropping rate to 10-15 seconds / drop, continue to react for 20 hours after the dropwise addition is completed, cool to room temperature after the reaction is completed, add 1mol / L hydrochloric acid solution to the reaction solution, and adjust to neutral or Weakly acidic, liquid separation, take the upper organic solution, and remove the toluene by rotary evaporation to obtain a transparent oi...

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Abstract

The invention provides a polyethylene glycol diazacyclo compound as shown in Figure 1. The invention further provides a preparation method of the compound, which comprises the following steps of: halogenating polyethylene glycol with a halogenation reagent to prepare polyethylene glycol dihalide, preparing long-chain diazacyclo amide via an amidation reaction of long-chain acyl halide and a diazacyclo compound, allowing polyethylene glycol dihalide and long-chain diazacyclo amide to give a quaternization reaction, and preparing the polyethylene glycol diazacyclo compound after purification, wherein the number of carbon atoms of long-chain acyl halide is 4-20; the polyethylene glycol diazacyclo compound has good swelling and washing resistance, and can effectively protect an oil reservoir;and the preparation method has the advantages of reliable method principles, easiness and simplicity in operation, higher productivity, greenness and environmental protection.

Description

technical field [0001] The invention relates to the technical field of oil field chemistry, in particular to a polyethylene glycol diazine heterocyclic compound, a preparation method and an application. Background technique [0002] With the deepening of oil and gas field development, more and more oil fields need water injection development. In the process of water injection development, due to the entry of external water, the original water balance of the formation is destroyed, and some easily hydratable clay minerals undergo hydration, expansion, and migration, and the oil and gas reservoirs are destroyed, affecting oil and gas production. The addition of clay stabilizers can reduce the damage of external water to the reservoir. [0003] Commonly used clay stabilizers include small inorganic molecules, small organic molecules, and organic polymers. [0004] Among them, KCl, NaCl, NH 4 Cl ammonium chloride etc. are commonly used inorganic small molecule clay stabilizer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D295/185C08G65/333C08G65/337C09K8/035C09K8/74
CPCC07D295/185C08G65/33317C08G65/337C09K8/035C09K8/607C09K8/74C09K2208/12
Inventor 苟绍华周利华段明何杨陈龙樊敏谭小林谢劲超
Owner SOUTHWEST PETROLEUM UNIV
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