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Compound oil-soluble viscosity reducer for reducing viscosity of thickened oil and preparation method of compound oil-soluble viscosity reducer

An oil-soluble viscosity reducer and viscosity reduction technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor viscosity reduction effect of viscosity reducer, high amount of thin oil added, and practical application limitations , to achieve the effect of good viscosity reduction, low amount of thin oil, and less use

Inactive Publication Date: 2014-12-24
NABAI KECHUANG BEIJING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent application 200810047022.8 reports an oil-soluble heavy oil viscosity reducer prepared from a blend of higher acrylic acid esters, methacrylates with hydroxyl groups, and dodecylbenzenesulfonic acid, and provides a method that can introduce surfactant groups The idea of ​​strengthening the viscosity-reducing effect of oil-soluble polymers, but because of the weak polarity of the groups contained in the components, the practical application is limited
CN103468228A discloses a kind of oil-soluble heavy oil viscosity reducer, its consumption is bigger (5%), CN102002353B, the viscosity reducer effect that CN102191028B announces is relatively poor (about 50%), although the viscosity reducer announced by CN102492410B is more effective Good, but its thin oil blend is too high (40%)

Method used

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Effect test

Embodiment 1

[0019] A compound oil-soluble viscosity reducer for heavy oil viscosity reduction and a preparation method thereof, comprising the following steps:

[0020] 1) According to methacrylic acid: octadecyl alcohol (molar ratio) = 1.2: 1, the addition of catalyst p-toluenesulfonic acid and polymerization inhibitor hydroquinone is 0.6% of the total mass of methacrylic acid and octadecyl alcohol monomer and 0.4%, choose methacrylic acid 10.3g, stearyl alcohol 27g, p-toluenesulfonic acid 0.2g, hydroquinone 0.15g; Heat to 60°C to make it all melt, and then add stirring bar, methacrylic acid, p-toluenesulfonic acid and hydroquinone in sequence. First raise the temperature to 115°C, stir and react, heat to reflux for 2 hours, then add a water separator and then raise the temperature to 140°C to continue the reaction. When the water output is 1mL, use dehydration under reduced pressure to extract the residual water and low boiling substances, that is The crude product was obtained; the cr...

Embodiment 2

[0026] A compound oil-soluble viscosity reducer for heavy oil viscosity reduction and a preparation method thereof, comprising the following steps:

[0027]1) according to the molar ratio of maleic anhydride: styrene: acrylamide is 5: 1: 2, the add-on amount of initiator benzoyl peroxide is 1.0% of the total mass of the monomer, use toluene as solvent, select maleic anhydride 10g, styrene 2.1g, acrylamide 2.9g and benzoyl peroxide 0.15g. Under the protection of N2, add maleic anhydride and 10 mL toluene into a three-necked flask equipped with a thermometer, a magnetic stirrer, a reflux condenser and a nitrogen replacement device. After the maleic anhydride is completely dissolved in toluene, add acrylamide, benzene Ethylene, at the same time, drop 2 mL of toluene solution dissolved in benzoyl peroxide at a rate of one drop every two seconds, stir and heat at 90 ° C, and react for 8 hours; 20 Alcohol: maleic anhydride monomer molar ratio is=1:1, add 30g C 20 Alcohol and an ap...

Embodiment 3

[0032] A compound oil-soluble viscosity reducer for heavy oil viscosity reduction and a preparation method thereof, comprising the following steps:

[0033] 1) according to the molar ratio of maleic anhydride: styrene: acrylamide is 4: 2: 2, the add-on of initiator benzoyl peroxide is 0.8% of monomer gross mass, use toluene as solvent, choose maleic anhydride 10g, styrene 5.3g, acrylamide 3.6g and benzoyl peroxide 0.15g. in N 2 Under protection, add maleic anhydride and 10mL toluene into a three-necked flask equipped with a thermometer, a magnetic stirrer, a reflux condenser, and a nitrogen replacement device. After the maleic anhydride is completely dissolved in toluene, add acrylamide and styrene in sequence. At the same time, drop 2 mL of toluene solution of dissolved benzoyl peroxide at a rate of one drop per five seconds, stir and heat at 90°C, and react for 8 hours; 18 Alcohol: maleic anhydride monomer molar ratio is=1.2:1, add 33g C 18 Alcohol and an appropriate amou...

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Abstract

The invention relates to a compound oil-soluble viscosity reducer for reducing viscosity of thickened oil and a preparation method of the compound oil-soluble viscosity reducer. The compound oil-soluble viscosity reducer is compounded of a ternary oil-soluble copolymer and an oil-soluble fatty alcohol polyoxyethylene ether nonionic surfactant. The compound oil-soluble viscosity reducer is characterized by comprising the following contents: 1) preparing octadecyl methacrylate; 2) preparing SMA which is a maleic anhydride-styrene-octadecyl methacrylate copolymer; 3) preparing SMZA which is an ester copolymer of maleic anhydride-styrene-acrylamide and higher alcohols; and 4) compounding the SMA or SMZA copolymer with a surfactant, wherein the mass ratio of the surfactant to the terpolymer is (0.5-1) to (1-3), and adding a solvent and stirring for an hour at 60 DEG C. The compound oil-soluble viscosity reducer is wide in raw material source, low in price, free of pollution, and simple in synthetic process, and has a wide market prospect.

Description

technical field [0001] The invention relates to a compound oil-soluble viscosity reducer for heavy oil viscosity reduction and a preparation method thereof. Background technique [0002] Due to the continuous demand for oil and the continuous decline in the recoverable volume and production of conventional crude oil, we must pay attention to the recovery of heavy oil and poor quality remaining oil. However, the high viscosity of heavy oil has brought difficulties to production, gathering, transportation and processing. The fundamental reason is that heavy oil has high colloid and asphaltene content and high molecular microscopic polymerization degree. In order to solve this problem, many scholars at home and abroad have studied the oil-soluble viscosity reducer for heavy oil. [0003] The research and application of oil-soluble viscosity reducers for heavy oil abroad are mostly fluidity improvers mainly based on pour point depressants. This kind of improver can effectively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/588C08F212/08C08F222/08C08F220/18C08F8/14
CPCC08F8/14C08F220/18C08F220/1818C08F2810/50C09K8/584C09K8/588C08F222/08C08F220/56C08F212/08
Inventor 相明辉肖贤明陈启文
Owner NABAI KECHUANG BEIJING TECH DEV
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