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Thickened oil viscosity depressant as well as preparation method and application thereof

A thick oil viscosity reducer, viscosity reducer technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of viscosity reducer prediction performance lag, amplification distortion, poor universal performance, etc., to achieve the application Remarkable effect, enhanced fluidity

Active Publication Date: 2012-10-10
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although great progress has been made in the development and application of heavy oil emulsified viscosity reducers at home and abroad, the existing viscosity reducers have a series of problems such as lagging prediction performance, poor universal performance, and serious amplification distortion. Effective, simple and effective heavy oil viscosity reducer will be of great significance

Method used

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  • Thickened oil viscosity depressant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Calculate the required amount of raw materials with the water output as 5ml, add C in an equimolar ratio to water in a four-necked flask with magnetic stirring and temperature control. 18 Saturated fatty alcohol, polymerization inhibitor hydroquinone and toluene solvent, heated to 50-60°C while stirring, after all solids were dissolved, add acrylic acid and catalyst p-toluenesulfonic acid in equimolar ratio to water; carry out temperature program, The heating rate is maintained at 3-5°C / 20min, and the maximum reaction temperature is controlled at 120°C; the water output is monitored, and when the water output reaches more than 96% of the theoretical value (ie: 5×96%=4.8mL), stop heating, End the reaction; use 5% NaOH solution to neutralize and wash the crude product to alkalinity to remove excess acrylic acid, catalyst p-toluenesulfonic acid, etc. in the reaction solution, and then wash with water until the reaction solution is neutral; distill the solvent under reduced ...

Embodiment 2

[0026] In a four-necked flask equipped with magnetic stirring, temperature control, condensation and nitrogen valve, free radical copolymerization of octadecyl acrylate monomer, maleic anhydride monomer and acrylamide monomer at a molar ratio of 1:1:1 Reaction: use toluene as a solvent, add chain transfer agent ethanol after the above monomers are completely dissolved, and add initiator benzoyl peroxide dropwise; replace with nitrogen for at least 30 minutes and three times or more, then carry out the procedure under nitrogen protection Heating, the heating rate is maintained at 3-5°C / 20min; the maximum reaction temperature is controlled at 120°C, the total reaction time of polymerization is controlled within 3 hours, and the reaction time within the temperature range of 110-120°C is 0.5-1.0 hours ; Apply high performance gel permeation chromatography (HPGPC) to detect the molecular weight, to ensure that the number average molecular weight is 300 ~ 500, otherwise repolymerizat...

Embodiment 3

[0029]In a four-necked flask equipped with magnetic stirring, temperature control, condensation and nitrogen valve, stearyl acrylate monomer, maleic anhydride monomer, styrene and acrylamide monomer were mixed in a molar ratio of 1:1:1:1 Carry out free radical copolymerization reaction: use toluene as solvent, add chain transfer agent ethanol after the above monomers are completely dissolved, and add initiator benzoyl peroxide drop by drop; Under protection, the temperature is programmed to rise, and the temperature rise rate is maintained at 3-5°C / 20min; the maximum temperature of the reaction is controlled to be 120°C, the total reaction time of the polymerization is controlled within 3 hours, and the reaction time is controlled within the temperature range of 110-120°C 0.5 to 1.0 hours; use high-performance gel permeation chromatography (HPGPC) to detect the molecular weight, and ensure that the number average molecular weight is 300 to 500, otherwise re-polymerization; wher...

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Abstract

The invention discloses a thickened oil viscosity depressant as well as a preparation method and an application thereof. The viscosity depressant is obtained by carrying out aminolysis reaction on a terpolymer or a quadripolymer with an alkyl primary amine with the chain length of C12-C18, wherein the terpolymer is formed by three monomers including acrylate with the chain length of C18-C22, maleic anhydride and acrylic amide; the quadripolymer is formed by four monomers including the acrylate with the chain length of C18-C22, the maleic anhydride, styrene and the acrylic amide; and the number-average molecular weight of the viscosity depressant is 300-1000, the smelting point is 50-70 DEG C and the boiling point is 300-550 DEG C. The thickened oil viscosity depressant disclosed by the invention has unique viscosity depression and resistance reduction effects on thickened oil; by only adding 500-1000 ppm of the thickened oil viscosity depressant, the viscosity depression ratio of the thickened oil with the viscosity of 14000-24000 mPa s at 50 DEG C reaches up to 85%; and the thickened oil viscosity depressant has an obvious application effect and positive meanings.

Description

technical field [0001] The present invention relates to a heavy oil viscosity reducer and its preparation method and application, in particular to a heavy oil viscosity reducer capable of acting on a viscosity of 14000-24000mPa.s at 50°C and its preparation method and application . Background technique [0002] With the deepening of crude oil exploitation in our country, the proportion of heavy oil (including extra heavy oil and super heavy oil) is increasing year by year. Generally speaking, crude oil with a viscosity of 10,000 to 50,000 mPa.s at 50°C is called extra-heavy crude oil, and crude oil with a viscosity greater than 50,000 mPa.s at 50°C is called super-heavy crude oil, and the density of super-heavy crude oil at 20°C is greater than 0.98 g / cm 3 . Heavy oil cannot be recovered by conventional methods because of its high density, high viscosity and poor fluidity. The key to heavy oil production is to reduce viscosity, reduce friction and improve rheology. At p...

Claims

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Application Information

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IPC IPC(8): C09K8/588C08F220/18C08F222/06C08F220/56C08F222/08C08F212/08C08F8/32
Inventor 张红肖稳发蒋鸿水
Owner SHANGHAI UNIV OF ENG SCI
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