Oligomeric viscoelastic surfactant, synthesis method and viscous acid formula

A technology of a surfactant and a synthesis method, which is applied in the synthesis method and its thickening acid formula, and the field of oligomeric configuration viscoelastic surfactants, can solve the problems of unreported and high cost of surfactant use, and achieves improved performance. The effect of mining efficiency, low synthesis cost and low concentration of use

Active Publication Date: 2019-02-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Trimeric to hexameric surfactants have been reported, but no reports have been reported for hexameric surfactants
In 2010, Jiangsu Oilfield began to carry out the application test of surface-active thickened acid in the oilfield. The acid system has good performance and application effect in terms of flow diversion, retardation, and acid thickening, but it still faces the problem of acid thickening. Problems such as high cost of active agents

Method used

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  • Oligomeric viscoelastic surfactant, synthesis method and viscous acid formula
  • Oligomeric viscoelastic surfactant, synthesis method and viscous acid formula
  • Oligomeric viscoelastic surfactant, synthesis method and viscous acid formula

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The synthetic product of this example is a hexameric configuration viscoelastic surfactant.

[0032] First, to synthesize the intermediate quaternary ammonium salt polyhaloalkane, add appropriate amount of ethylenediamine, 1,3-dichloropropane, potassium carbonate and ethylene glycol solvent into the reaction kettle, wherein ethylenediamine, 1,3-dichloro The molar ratio of propane and potassium carbonate is 1:6:3 The ratio of the mass of ethylene glycol solvent to the sum of the mass of reactants ethylenediamine, 1,3-dichloropropane and potassium carbonate is 2:3. During the reaction, the reaction kettle Raise the temperature to 50°C, react for 3 hours, continue to heat up to 95°C, react for 9 hours, and cool to room temperature to obtain a mixture A1 containing quaternary ammonium salt polyhalogenated alkanes intermediates with the following structure. During the reaction, potassium carbonate is used for absorption. hydrochloric acid, the reaction formula of this step i...

Embodiment 2

[0039] The synthesized product in this example is a decamer configuration viscoelastic surfactant.

[0040] First, to synthesize the intermediate quaternary ammonium salt polyhaloalkane, add an appropriate amount of triethylenetetramine, 1,3-dichloropropane, potassium carbonate and ethylene glycol solvent into the reactor, wherein triethylenetetramine, 1,3- The molar ratio of dichloropropane and potassium carbonate is 1:10:3, and the ratio of the quality of ethanol solvent to the mass sum of reactants triethylenetetramine, 1,3-dichloropropane and potassium carbonate is 2:3. During the reaction, Heat the reaction kettle to 55°C, react for 3 hours, continue to heat up to 95°C, react for 9 hours, and cool to room temperature to obtain a mixture A2 containing a quaternary ammonium salt polyhalogenated alkanes intermediate with the following structure. During the reaction, potassium carbonate is used to absorb The hydrochloric acid produced in the reaction, the reaction formula of ...

Embodiment 3

[0048] The synthesized product in this example is a fourteen-mer configuration viscoelastic surfactant.

[0049] First, to synthesize the intermediate quaternary ammonium salt polyhaloalkane, add an appropriate amount of pentaethylene hexamine, 1,3-dibromopropane, sodium carbonate and 1-2 propanol solvent into the reactor, wherein pentaethylene hexamine, 1, The molar ratio of 3-dibromopropane and sodium carbonate is 1:14:4, the ratio of the mass of 1-2 propanol solvent to the mass sum of reactants triethylenetetramine, 1,3-dichloropropane and sodium carbonate is 2: 3. During the reaction, heat the reactor to 60°C, react for 2.5 hours, continue to heat up to 95°C, react for 9 hours, and cool to room temperature to obtain a mixture A3 containing a quaternary ammonium salt polyhalogenated alkanes intermediate with the following structure. During the reaction , potassium carbonate is used to absorb the hydrochloric acid produced in the reaction, and the reaction formula of this st...

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Abstract

The invention relates to an oligomeric viscoelastic surfactant, a synthesis method and a viscous acid formula in the technical field of viscous acids in oil reservoir exploitation. The oligomeric viscoelastic surfactant is prepared by the following steps: firstly, taking organic amine and halogenated alkane as main raw materials, synthesizing a quaternary ammonium salt-containing polyhalogenated alkane intermediate; then, adding tertiary amine into a synthesis product in the first step, and continuing a synthesis reaction to obtain an oligomeric quaternary ammonium salt cationic viscoelastic surfactant. The oligomeric viscoelastic surfactant can replace the existing viscoelastic surfactants in the field of oil production engineering, has a plurality of quaternary ammonium salt cations on linking groups in comb-like distribution, has a high degree of polymerization, effectively reduces the critical micelle concentration, has relatively good thickening, anti-swelling, and drainage-promoting effects and makes a rock wetter; in addition, the surfactant structurally does not contain amide bonds, so that decomposition under a strong acid condition is effectively avoided and the application range in the oil field acidifying industry is widened.

Description

technical field [0001] The invention relates to thickened acid technology in oil layer exploitation, in particular to an oligomeric configuration viscoelastic surfactant, its synthesis method and its thickened acid formula. Background technique [0002] Oligomeric surfactants are dimeric, trimeric, tetrameric or even more oligomeric surfactants that are formed by linking two or more single-headed and single-chain surfactants at or near the head group through chemical bonds. A molecule with a high degree of oligomerization, it has more hydrophilic head groups and hydrophobic alkyl chains than Gemini surfactants, and has a more complex and diverse molecular configuration. Oligomeric surfactants have lower critical micelle concentration, higher surface activity and stronger aggregation ability, especially some oligomeric surfactants can pass the strong hydrophobic association between molecules at very low concentrations. By forming large aggregates, the use efficiency of surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/72
CPCC09K8/604C09K8/725C09K2208/30
Inventor 虞建业卢敏晖袁玉峰袁萍
Owner CHINA PETROLEUM & CHEM CORP
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