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A kind of multi-component associative polymer cleaning fracturing fluid thickener and preparation method

A technology for cleaning fracturing fluids and polymers, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of uneven performance of thickeners, different association performance, unstable network structure, etc. problems, to achieve the effect of super suspending ability, good shear resistance, excellent viscoelasticity and shear thinning

Active Publication Date: 2015-09-02
北京爱普聚合科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the associative monomers in thickeners in the market have their own advantages and disadvantages, and their association performances are different. Their weak associations lead to unstable network structure, so that the performance of thickeners is uneven.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] The preparation method of APCF of the present invention, comprises the steps:

[0054] Step 1: Synthesis of multiple associative monomers

[0055] Synthesis of maleic acid mono-long carbon chain alkyl ester sodium salt (carbon chain length 8-22): keep the temperature in the kettle at 10-30°C, add 49.5-56.9% of the total mass of the mixed reaction system into the monomer reactor % toluene solvent, then add 12-14% maleic anhydride and stir until dissolved, then add 26-30% long carbon chain alcohol (carbon chain length 8-22) and 0.1-0.5% catalyst p-methyl Sodium benzenesulfonate was stirred until dissolved. Close the reactor and heat up to 60-80°C for 6-8 hours, then neutralize with 5-6% sodium hydroxide for 1-2 hours, cool to room temperature, and filter to obtain a white solid that is butene Diacid mono-long carbon chain alkyl ester sodium salt.

[0056] Synthesis of N-long carbon chain alkylacrylamide (carbon chain length 8-22): keep the temperature in the kettle at ...

Embodiment 1

[0069] Preparation and performance test of multi-component associative polymer clean fracturing fluid thickener APCF1:

[0070] 1. Keep the temperature in the kettle at 20°C, add 80.55g of toluene to the monomer reaction kettle, then add 19.5g of maleic anhydride and stir until dissolved, then add 42g of dodecyl alcohol and 0.45g of sodium p-toluenesulfonate g Stir until dissolved. After sealing the reaction kettle, heat up to 75°C for 8 hours, then neutralize with 7.5g of sodium hydroxide for 2 hours, cool to room temperature, and filter to obtain a solid that is monododecyl maleate sodium salt .

[0071] 2. Keep the temperature in the kettle at 20°C, add 128g of deionized water into the stirring mixing kettle, then add 30g of acrylamide and 30g of sodium propylene sulfonate and stir until dissolved, then add the association monomer maleic acid monododecane Alkyl ester sodium salt 6g, hexadecyl vinyl ether 6g and stirred until dissolved. Then, 0.4 g of sodium persulfate, 0...

Embodiment 2

[0075] Preparation and performance test of multi-component associative polymer clean fracturing fluid thickener APCF2:

[0076] 1. Keep the temperature in the kettle at 25°C, add 71.7g of toluene to the monomer reaction kettle, then add 60g of octadecylamine and stir until dissolved, then add 18g of acrylic acid and 0.3g of sodium p-toluenesulfonate and stir until dissolved. Raise the temperature to 90°C, pass the water separator to seal the reaction and separate the water produced by the reaction, react for 24 hours, then distill under reduced pressure at 85°C for 12 hours until there is no distillate, and the light yellow oily solid obtained in the reaction kettle after cooling to room temperature is N-octadecyl acrylamide.

[0077] 2. Keep the temperature in the kettle at 25°C, add 40g of absolute ethanol to another monomer reaction kettle, then add 75g of behenyldimethyl tertiary amine and stir until dissolved, then add 30g of allyl chloride and stir until dissolved. After ...

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Abstract

The invention relates to a multiple association type polymer cleaning fracturing fluid thickening agent, wherein evaluation indicators comprise that: 0.3% aqueous solution 20 DEG C viscosity is more than or equal to 30 mPa.s, solution viscosity after gel breaking is less than or equal to 5 mPa.s, and a static sand suspending time is more than or equal to 10 min. The invention further discloses a method for preparing the multiple association type polymer cleaning fracturing fluid thickening agent.

Description

technical field [0001] The invention relates to a multi-component associative polymer cleaning fracturing fluid thickener (APCF). [0002] The present invention also relates to a preparation method of the above-mentioned multi-component associative polymer cleaning fracturing fluid thickener. Background technique [0003] The purpose of fracturing is to form fractures with conductivity in the formation, and the fracturing fluid used largely determines the fracturing effect. At the same time, there are certain requirements for the viscosity of the fracturing fluid, so that it can become a low-viscosity fluid after fracturing and is easy to flow back, so as to avoid damage to the oil and gas layers in the formation. [0004] Currently used fracturing fluids include water-based fracturing fluids, oil-based fracturing fluids, foam fracturing fluids, and emulsified fracturing fluids. Among them, water-based fracturing fluids have the advantages of low cost and high safety, and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68C08F220/56C08F220/58C08F228/02C08F4/40
Inventor 郑焰罗于建白小丹
Owner 北京爱普聚合科技有限公司
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