Trivalent cation viscoelastic surfactant, and preparation method and application thereof as well as clean fracturing fluid

A surfactant and clean fracturing fluid technology, which is applied in the preparation of carboxylic acid amide, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problems of poor high temperature resistance, complicated preparation process, high production cost, etc., and achieve performance impact Small size, simple preparation, and the effect of increasing yield

Active Publication Date: 2018-05-18
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of triad cationic viscoelastic surfactant and its preparation method, application, and the clean fracturing fluid that comprises this tr

Method used

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  • Trivalent cation viscoelastic surfactant, and preparation method and application thereof as well as clean fracturing fluid
  • Trivalent cation viscoelastic surfactant, and preparation method and application thereof as well as clean fracturing fluid
  • Trivalent cation viscoelastic surfactant, and preparation method and application thereof as well as clean fracturing fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The preparation method of the triple cationic viscoelastic surfactant of the present embodiment is as follows:

[0054] Add 60mmol of N,N'-dimethyl-1,3-propanediamine into a round bottom flask, use ethanol as solvent, add 200mmol of epichlorohydrin and 60mmol of concentrated hydrochloric acid, reflux at 60°C for 6 hours, and react After the end, the intermediate A was obtained by distillation and extraction under reduced pressure. Dissolve the obtained intermediate A in ethanol, add 180 mmol of erucamide propyl dimethylamine, and reflux for 12 hours at 85°C and 250 r / min. After the reaction, the solvent ethanol is distilled off under reduced pressure to obtain a light yellow viscous Liquid, that is, triad cationic viscoelastic surfactants.

[0055] The critical micelle concentration of the tensio-active agent of the present embodiment is 1.44 * 10 -4 mol / L.

[0056] The clean fracturing fluid prepared by 3% Sanzi cationic viscoelastic surfactant + 1.2% sodium salicyl...

Embodiment 2

[0058] The preparation method of the triple cationic viscoelastic surfactant of the present embodiment is as follows:

[0059] Add 60mmol of N,N'-dimethyl-1,3-propanediamine into a round bottom flask, use ethanol as solvent, add 200mmol of epichlorohydrin and 60mmol of concentrated hydrochloric acid, reflux at 60°C for 6 hours, and react After the end, the intermediate A was obtained by distillation and extraction under reduced pressure. Dissolve the obtained intermediate A in ethanol, add 180 mmol of oleic acid amidopropyl dimethylamine, and reflux for 12 hours at 85°C and 270 r / min. After the reaction is completed, the solvent ethanol is distilled off under reduced pressure to obtain a light yellow viscous Liquid, that is, triad cationic viscoelastic surfactants.

[0060] The critical micelle concentration of the tensio-active agent of the present embodiment is 1.56 * 10 -4 mol / L.

[0061] The clean fracturing fluid prepared by 3% Sanzi cationic viscoelastic surfactant + ...

Embodiment 3

[0063] The preparation method of the triple cationic viscoelastic surfactant of the present embodiment is as follows:

[0064] Add 60mmol of N,N'-dimethyl-1,3-propanediamine into a round bottom flask, use ethanol as solvent, add 200mmol of epichlorohydrin and 60mmol of concentrated hydrochloric acid, reflux at 60°C for 6 hours, and react After the end, the intermediate A was obtained by distillation and extraction under reduced pressure. Dissolve the obtained intermediate A with ethanol, add 180 mmol of stearic acid amidopropyl dimethylamine, and reflux for 12 hours at 85°C and 280 r / min. After the reaction is completed, the solvent ethanol is distilled off under reduced pressure to obtain a light yellow viscous Viscous liquid, that is, triad cationic viscoelastic surfactant.

[0065] The critical micelle concentration of the tensio-active agent of the present embodiment is 1.84 * 10 -4 mol / L.

[0066] The clean fracturing fluid prepared by 3% Sanzi cationic viscoelastic su...

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Abstract

The invention discloses a trivalent cation viscoelastic surfactant, and a preparation method and application thereof as well as clean fracturing fluid. An intermediate A is prepared by utilizing N,N'-dimethyl-1,3-dipropylene diamine and epichlorohydrin, the trivalent cation viscoelastic surfactant is prepared by the intermediate A and fatty acid amidopropyl dimethylamine, and the preparation process is simple. The clean fracturing fluid provided with the surfactant is excellent in temperature and shear resistance, strong in suspended sand performance, simple in field preparation, automatic ingel breaking, low in formation damage, low in cost and simple in preparation process as well as strong in temperature resistance, and the viscosity of the product can be maintained at 42 mPa.s under 170 s<-1> at a temperature of 180 DEG C after 80 minutes and is higher than the field construction requirements for the viscosity of the clean fracturing fluid (more than 25 mPa.s).

Description

technical field [0001] The invention relates to the technical field of fracturing fluid for petroleum reservoirs, in particular to a three-son cationic viscoelastic surfactant, its preparation method, application and cleaning fracturing fluid. Background technique [0002] With the rapid development of oil and gas exploration, a large number of unconventional oil and gas reservoirs have come into people's sight, and the exploitation of such oil and gas reservoirs is much more difficult than conventional oil and gas reservoirs. After nearly 70 years of development, hydraulic fracturing technology has gradually become one of the main measures to improve the production efficiency of oil and gas fields. In hydraulic fracturing, the performance of the fracturing fluid has a great influence on the entire construction process. Therefore, how to improve the performance of the fracturing fluid has attracted widespread attention at home and abroad. [0003] Viscoelastic Surfactant (V...

Claims

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Application Information

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IPC IPC(8): C07C233/36C07C233/38C07C231/12C09K8/68C09K8/86
CPCC09K8/602C09K8/68C09K8/86C07C233/36C07C233/38C09K2208/30C07C231/12C07C235/74
Inventor 毛金成范津铭赵金洲杨小江
Owner SOUTHWEST PETROLEUM UNIV
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