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Thick oil-soluble viscosity reducer and preparation method thereof

A technology for oil-soluble viscosity reducer and heavy oil, applied in the field of oil-soluble viscosity reducer for heavy oil and crude oil viscosity reduction treatment agent, can solve the problems of insignificant viscosity reduction effect, poor viscosity reduction effect and poor universality, etc. Save the amount of thin oil, good viscosity reduction effect, and improve the effect of aroma

Active Publication Date: 2012-06-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing oil-soluble viscosity reducers have poor viscosity reduction effect, low viscosity reduction rate, poor universality, and most of them are only used as fluidity improvers for the transportation of heavy oil, and their application in heavy oil production has just started. Most of them are limited to indoor research and field tests, and the viscosity reduction effect is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Weigh 10.3g of methacrylic acid, 24.2g of cetyl alcohol, 0.17g of p-toluenesulfonic acid and 0.10g of hydroquinone; add cetyl alcohol in a three-necked flask equipped with a thermometer, a mechanical stirrer and a reflux condenser , heated to 60°C to completely melt cetyl alcohol, then add water-carrying agent n-hexane, hydroquinone, methacrylic acid and p-toluenesulfonic acid in sequence, stir and react at 110°C for 6h, and the reaction is completed; Water-carrying agent, vacuum distillation to remove unreacted methacrylic acid to obtain crude product, the crude product was washed with 5wt% sodium hydroxide solution until colorless, then repeatedly washed with deionized water until neutral, and vacuum-dried at 50°C for 3h , to obtain cetyl methacrylate;

[0035] 2) Weigh 20.0 g of methyl methacrylate and 6.0 g of ethylenediamine, make methyl methacrylate into anhydrous methanol solution with a concentration of 10%, and make ethylenediamine into anhydrous methanol wi...

Embodiment 2

[0042] 1) Weigh 12.9g of methacrylic acid, 32.6g of behenyl alcohol, 0.36g of benzenesulfonic acid and 0.23g of tert-butylcatechol; Diol, heated to 80°C to completely melt behenyl alcohol, then add water-carrying agent n-hexane, tert-butylcatechol, methacrylic acid and benzenesulfonic acid in sequence, stir and react at 130°C for 8 hours, and the reaction ends; usually Remove the water-carrying agent by pressure distillation, and remove unreacted methacrylic acid by distillation under reduced pressure to obtain a crude product. The crude product is washed with 5wt% sodium hydroxide solution until it is colorless, and then repeatedly washed with deionized water until neutral. Vacuum drying for 5h to obtain behenyl methacrylate;

[0043] 2) Weigh 34.2g of ethyl methacrylate and 7.4g of ethylenediamine, make ethyl methacrylate into a 10% anhydrous methanol solution, and make ethylenediamine into a 10% anhydrous methanol solution solution; under nitrogen protection, in a four-nec...

Embodiment 3

[0049] 1) Weigh 11.2g of methacrylic acid, 27.0g of stearyl alcohol, 0.23g of naphthalenesulfonic acid and 0.15g of hydroquinone; add stearyl alcohol in a three-necked flask equipped with a thermometer, a mechanical stirrer and a reflux condenser, Heat to 70°C to completely melt stearyl alcohol, then add water-carrying agent n-hexane, hydroquinone, methacrylic acid and naphthalenesulfonic acid in sequence, stir and react at 120°C for 7 hours, and the reaction is completed; atmospheric pressure distillation removes the water-carrying agent agent, and unreacted methacrylic acid was distilled off under reduced pressure to obtain a crude product. The crude product was washed with 5wt% sodium hydroxide solution until colorless, then repeatedly washed with deionized water until neutral, and dried in vacuum at 50°C for 4h to obtain Stearyl methacrylate;

[0050] 2) Weigh 30.0 g of methyl methacrylate and 6.0 g of ethylenediamine, make methyl methacrylate into anhydrous methanol solut...

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Abstract

The invention relates to a thick oil-soluble viscosity reducer which is applied to viscosity reduction of crude oil in an oilfield and is characterized by comprising the following components in parts by mass: 15-25 parts of quaternary copolymer as a main agent, 2-3 parts of Span-80 and 1-2 parts of organic silicon surfactant serving as auxiliary agents, and 35-65 parts of petroleum solvent naphtha and 5-15 parts of benzene solvent serving as solvents, wherein the quaternary copolymer is a copolymer of long-chain alkyl methacrylate, styrene, N,N-bis(methacryloyl) diamine and maleic anhydride. The thick oil-soluble viscosity reducer has the effects of good viscosity reducing effect, no pollution and obvious economic benefit, and greatly saves the dosage of thin oil; and the viscosity reducing rate to thick oil with temperature of 50 DEG C and viscosity of 50000-600000 mPa s is more than 99% when the dosage of the viscosity reducer is 500-3000 ppm.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oil fields, in particular to a crude oil viscosity-reducing treatment agent, which is an oil-soluble viscosity-reducing agent for heavy oil. Background technique [0002] With the deepening of oil exploitation and the continuous decline in recoverable volume and output of conventional crude oil, thickening and heavy crude oil has become a worldwide irreversible trend, and heavy oil has gradually become an important part of crude oil production in many countries . [0003] The total geological reserves of heavy oil discovered in the world is 700×10 9 m 3 , the recoverable reserves are 151×10 9 m 3 , and the recoverable reserves of conventional crude oil are 159×10 9 m 3 quite. my country is rich in heavy oil reserves. The proven oil reserves are about 5 billion tons, of which 1.4 billion tons are heavy oil, accounting for nearly 30% of the total oil reserves. It is the fourth largest...

Claims

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Application Information

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IPC IPC(8): C09K8/588C09K8/584
Inventor 沈建新马桂霞杨之照周怀光王法鑫
Owner PETROCHINA CO LTD
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