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Zwitterionic gemini viscoelasticity surfactant, preparing method thereof and clean fracturing fluid with zwitterionic viscoelasticity surfactant as thickening agent

A surfactant and cleaning fracturing fluid technology, applied in chemical instruments and methods, transportation and packaging, drilling compositions, etc., can solve the problems of high cost, complicated preparation process, poor temperature resistance, etc., and achieve low cost , less dosage, good temperature resistance

Inactive Publication Date: 2017-01-04
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a gemini amphoteric viscoelastic surfactant and its preparation method and a clean fracturing fluid using it as a thickening agent, which can solve the problems of poor temperature resistance, high cost and complicated preparation process existing in the existing clean fracturing fluid system The problem

Method used

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  • Zwitterionic gemini viscoelasticity surfactant, preparing method thereof and clean fracturing fluid with zwitterionic viscoelasticity surfactant as thickening agent
  • Zwitterionic gemini viscoelasticity surfactant, preparing method thereof and clean fracturing fluid with zwitterionic viscoelasticity surfactant as thickening agent
  • Zwitterionic gemini viscoelasticity surfactant, preparing method thereof and clean fracturing fluid with zwitterionic viscoelasticity surfactant as thickening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 10mmol of 2,2 bis(bromomethyl)-1,3-propanediol was added to a round bottom flask, with tetrahydrofuran as a solvent, 20mmol of erucamide propyl dimethylamine was added, and refluxed at 60°C for 12 hours, wherein n (2,2 bis(bromomethyl)-1,3-propanediol):n(erucamide propyl dimethylamine)=1:2, intermediate A was obtained by distillation under reduced pressure after the reaction was completed. Dissolve the intermediate A obtained in the first step in tetrahydrofuran, add 20-22mmol of sodium hydride, stir at room temperature for about 15min, then dissolve 20mmol of 1,3 propane sultone in 50mL of tetrahydrofuran, and slowly add it dropwise to the intermediate In the reaction solution of A and sodium hydride, reflux at 60°C for 12 hours, wherein n(intermediate A):n(sodium hydride):n(1,3 propane sultone)=1:2~2.2:2, the reaction is over Afterwards, react with hydrochloric acid and excess sodium hydride, filter and distill under reduced pressure to obtain yellow viscous colloidal...

Embodiment 2

[0039]Add 10mmol of 2,2 bis(bromomethyl)-1,3-propanediol into a round bottom flask, use tetrahydrofuran as solvent, add 20mmol of arachidamide propyl dimethylamine, reflux at 60°C for 12 hours, where n (2,2 bis(bromomethyl)-1,3-propanediol):n(arachidic acid amidopropyl dimethylamine)=1:2, intermediate A was obtained by distillation under reduced pressure after the reaction was completed. Dissolve the intermediate A obtained in the first step in tetrahydrofuran, add 20-22mmol of sodium hydride, stir at room temperature for about 15min, then dissolve 20mmol of 1,3 propane sultone in 50mL of tetrahydrofuran, and slowly add it dropwise to the intermediate In the reaction solution of A and sodium hydride, reflux at 60°C for 12 hours, wherein n(intermediate A):n(sodium hydride):n(1,3 propane sultone)=1:2~2.2:2, the reaction is over Afterwards, react with hydrochloric acid and excess sodium hydride, filter and distill under reduced pressure to obtain yellow viscous colloidal Gemini a...

Embodiment 3

[0041] 10mmol of 2,2 bis(bromomethyl)-1,3-propanediol was added to a round bottom flask, with tetrahydrofuran as a solvent, 20mmol of oleic acid amidopropyl dimethylamine was added, and refluxed at 60°C for 12 hours, wherein n (2,2 bis(bromomethyl)-1,3-propanediol):n(oleic acid amidopropyl dimethylamine)=1:2, and intermediate A was obtained by distillation under reduced pressure after the reaction was completed. Dissolve the intermediate A obtained in the first step in tetrahydrofuran, add 20-22mmol of sodium hydride, stir at room temperature for about 15min, then dissolve 20mmol of 1,3 propane sultone in 50mL of tetrahydrofuran, and slowly add it dropwise to the intermediate In the reaction solution of A and sodium hydride, reflux at 60°C for 12 hours, wherein n(intermediate A):n(sodium hydride):n(1,3 propane sultone)=1:2~2.2:2, the reaction is over Afterwards, react with hydrochloric acid and excess sodium hydride, filter and distill under reduced pressure to obtain yellow v...

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Abstract

The invention provides a zwitterionic gemini viscoelasticity surfactant, a preparing method thereof and clean fracturing fluid with the zwitterionic viscoelasticity surfactant as a thickening agent. The clean fracturing fluid prepared with the method is simple in material, low in cost, obvious in microcosmic net structure, good in viscoelasticity, excellent in sand suspending performance and thorough in gel breaking, and the clean fracturing fluid has the maximal advantage of being good in temperature resistance; the shear viscosity of the best product at the temperature below 160 DEG C is larger than or equal to 130 mPa.s, and is much larger than 25 mPa.s of the site construction requirement of the clean fracturing fluid.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a gemini amphoteric viscoelastic surfactant, a preparation method thereof and a clean fracturing fluid using it as a thickening agent. Background technique [0002] In today's world, the era of relying on the natural energy of the formation to make oil bubbling out of the ground has come to an end. Most large-scale high-permeability oil and gas fields in the world have entered the late stage of exploitation, but the demand for oil in countries around the world continues to rise. The teams of oil exploration and development at home and abroad have begun to Entering low-permeability, ultra-low-permeability and unconventional marginal oil and gas reservoirs, reservoir fracturing has become the key to improving oil recovery. Oilfield production has continuously increased requirements for reservoir production and fracturing efficiency. Reservoir stimulation (incl...

Claims

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Application Information

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IPC IPC(8): B01F17/22C09K8/86C09K23/22
CPCC09K8/602C09K8/86C09K2208/30C09K23/00
Inventor 毛金成杨小江张恒李勇明赵金洲
Owner SOUTHWEST PETROLEUM UNIV
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