Temperature-resistant and salt-resistant fracturing fluid thickening agent and preparation method thereof

A fracturing fluid thickener and salt type technology, which is applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of low polymer molecular weight, poor temperature and salt resistance, etc., and achieve fast reaction speed, Avoid the effect of steric hindrance between groups, and the reaction process is stable

Inactive Publication Date: 2022-03-01
南通博亿化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the objectives of the present invention is to provide a temperature-resistant and salt-resistant fracturing fluid thickener to solve the problems of low molecular weight and poor temperature-resistant and salt-resistant performance of polymers in the prior art

Method used

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  • Temperature-resistant and salt-resistant fracturing fluid thickening agent and preparation method thereof
  • Temperature-resistant and salt-resistant fracturing fluid thickening agent and preparation method thereof
  • Temperature-resistant and salt-resistant fracturing fluid thickening agent and preparation method thereof

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preparation example Construction

[0037] The invention provides a method for preparing a temperature-resistant and salt-resistant fracturing fluid thickener, comprising the following steps:

[0038] Step 1, α-olefin amine and SO 3 Carry out the sulfonation reaction, cool the brine to control the sulfonation temperature to 5-10°C, heat the mixed liquid after sulfonation to 50-60°C to separate layers, take the lower milky liquid, and dry under vacuum for 12 hours to obtain the alkyl sulfonate amine;

[0039] Step 2. Reflux the above-prepared alkylamine sulfonate and benzaldehyde at 70°C for 16 hours, lower the reaction temperature to 5°C-10°C, and perform rotary distillation under reduced pressure. The residue after distillation is benzamide alkylsulfonate acid;

[0040] Step 3. Lower the temperature of benzamide alkylsulfonic acid to 0-5°C, and react with acryloyl chloride in the presence of triethylamine for 4-6 hours to obtain a temperature-resistant and salt-resistant functional monomer N-benzyl-N- Acryla...

preparation Embodiment 1

[0069] Add 100g of α-butenylamine and 200ml of dichloromethane into a four-necked flask, cool it to 5°C with an ice-water bath, and slowly introduce 138g of SO 3 Carry out the sulfonation reaction, control the feed rate so that the reaction temperature is maintained below 10°C, after 6 hours of reaction, heat the sulfonated mixture to 50°C and continue the reaction for 2 hours, take off the milky liquid in the lower layer by layering, and dry under vacuum for 12 hours , to obtain butylamine sulfonate;

[0070] 50 g of butylamine sulfonate prepared in the above steps and 35 g of benzaldehyde were refluxed at 70°C for 16 hours, the reaction temperature was lowered to 10°C, and rotary distillation was performed under reduced pressure. The residue after distillation was benzamide butylsulfonic acid;

[0071] Add 50g of benzamide butyl sulfonic acid and 100ml of dichloromethane into a four-neck flask, lower the temperature to 2°C, add 1g of triethylamine, then start to drop 20.2g o...

preparation Embodiment 2

[0073] Add 100g of α-butenylamine and 200ml of acetone into a four-necked flask, cool it to 8°C with an ice-water bath, and slowly introduce 122g of SO 3 Carry out the sulfonation reaction, control the feed rate so that the reaction temperature is maintained below 10°C, after 8 hours of reaction, heat the sulfonated mixture to 60°C and continue the reaction for 2 hours, take off the milky liquid in the lower layer by layering, and dry under vacuum for 12 hours , to obtain butylamine sulfonate;

[0074] 50 g of butylamine sulfonate prepared in the above steps and 35 g of benzaldehyde were refluxed at 70°C for 16 hours, the reaction temperature was lowered to 10°C, and rotary distillation was performed under reduced pressure. The residue after distillation was benzamide butylsulfonic acid;

[0075] Add 50g of benzamide butylsulfonic acid and 100ml of acetone into a four-necked flask, lower the temperature to 3°C, add 2g of triethylamine, then start to drop 22g of acryloyl chlori...

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Abstract

The invention discloses a temperature-resistant and salt-resistant fracturing fluid thickening agent and a preparation method thereof, and relates to a polymer thickening agent in the fracturing process in the field of exploration and development of oil and gas fields. The preparation method comprises the following steps: sulfonating alpha-olefin amine to obtain sulfonic acid alkylamine, reacting with benzaldehyde to obtain benzamide alkyl sulfonic acid, reacting with acryloyl chloride to obtain a temperature-resistant and salt-resistant functional monomer N-benzyl-N-acrylamido-alkyl sulfonic acid (AMBPS), and reacting with acrylamide to obtain the temperature-resistant and salt-resistant functional monomer AMBPS. Mixing and dissolving AMBPS, acrylamide, a chelating agent, a cosolvent, a polymer stabilizer, an initiator and the like, introducing nitrogen, and irradiating the solution under an ultraviolet lamp to prepare the temperature-resistant and salt-resistant fracturing fluid thickening agent. The prepared thickening agent is simple in process and rapid in reaction, and the obtained product is high in molecular weight, high in dissolving speed and high in temperature resistance and salt resistance and has a good application effect in the field of fracturing fluid thickening.

Description

technical field [0001] The invention relates to a polymer thickener in the fracturing process in the field of exploration and development of oil and gas fields. Background technique [0002] Fracturing is a commonly used oil stimulation operation. Fracturing is a production stimulation measure that uses pressure to open the formation to form fractures and prop it up with proppant to reduce fluid flow resistance. The proppant is also called fracturing fluid. Fracturing fluids require sufficient viscosity to transmit power, reduce fluid loss, and carry proppants. [0003] Thickener is the main additive in water-based fracturing fluid, which is related to the performance of fracturing fluid and the success of fracturing. [0004] The currently used fracturing fluid thickeners are divided into two categories: natural polysaccharides and their derivatives and synthetic polymers. Natural guar gum and its derivatives are used as thickeners for fracturing fluids with incomplete ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F2/48C09K8/68C09K8/88
CPCC08F220/56C08F2/48C09K8/68C09K8/882C08F220/585C08F2500/01
Inventor 吴江勇
Owner 南通博亿化工有限公司
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