Low-molecular hyperbranched oil-soluble thickened oil viscosity reducer and preparation method thereof

A viscosity reducer, oil-soluble technology, used in chemical instruments and methods, mechanical equipment, gas/liquid distribution and storage, etc., can solve problems such as general viscosity reduction effect and strong pertinence, and achieve good oil solubility and easy operation. , the effect of mild reaction conditions

Active Publication Date: 2015-05-20
SOUTHWEST PETROLEUM UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a low-molecular hyperbranched oil-soluble heavy oil viscosity reducer and its preparation method in order to overcome the shortcomings of the existing oil-soluble viscosity reducer, such as general viscosity reduction effect and strong pertinence. To improve the viscosity reduction efficiency of heavy oil

Method used

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  • Low-molecular hyperbranched oil-soluble thickened oil viscosity reducer and preparation method thereof

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Embodiment 1

[0011] Add 1.2g of ethylenediamine, 2.4g of acetophenone and 7.69g of butyl acrylate in a four-necked flask equipped with a spherical condenser, a thermometer, a magnetic stirrer and an inlet pipe according to the molar percentage of the raw materials, and add 1 , 8.3g of 4-dioxane solvent, stirred and dissolved; then add 6g of formaldehyde solution with a mass percentage concentration of 30% to 40% and 9g of 1,4-dioxane in a constant pressure titration funnel Titration; put nitrogen protection in the four-necked flask and stir; heat, when the temperature rises to 60°C, start to drop the formaldehyde solution in the constant pressure funnel, control the drop rate at 1 drop / 4s, and wait for the reaction to proceed for 6 hours. Turn off heat. Then the above reaction solution was rotary evaporated under vacuum conditions to remove the solvent 1,4-dioxane and water; finally, the solution after rotary evaporation was purified with methanol four times to remove the upper liquid, and...

Embodiment 2

[0013] Add 1.2g of ethylenediamine, 2.4g of acetophenone and 7.69g of butyl acrylate in a four-necked flask equipped with a spherical condenser, a thermometer, a magnetic stirrer and an inlet pipe according to the molar percentage of the raw materials, and add 1 , 17.3g of 4-dioxane solvent, stir and dissolve; then add 6g of formaldehyde solution with a mass percentage concentration of 30% to 40% and 17.3g of 1,4-dioxane in a constant pressure titration funnel Wait for titration; put nitrogen protection in the four-necked flask and stir; heat, when the temperature rises to 60°C, start to drop the formaldehyde solution in the constant pressure funnel, control the dropping speed at 1 drop / 4s, and wait for the reaction to proceed for 6 hours , stop heating. Then the above reaction solution was rotary evaporated under vacuum conditions to remove the solvent 1,4-dioxane and water; finally, the solution after rotary evaporation was purified with methanol for 5 times, the upper liqui...

Embodiment 3

[0015] Add 1.2g of ethylenediamine, 2.4g of acetophenone and 7.69g of butyl acrylate in a four-necked flask equipped with a spherical condenser, a thermometer, a magnetic stirrer and an inlet pipe according to the molar percentage of the raw materials, and add 1 , 17.3g of 4-dioxane solvent, stir and dissolve; then add 6g of formaldehyde solution with a mass percentage concentration of 30% to 40% and 17.3g of 1,4-dioxane in a constant pressure titration funnel Wait for titration; put nitrogen protection in the four-necked flask and stir; heat, when the temperature rises to 70°C, start to drop the formaldehyde solution in the constant pressure funnel, control the dropping speed at 1 drop / 4s, and wait for the reaction to proceed for 7 hours , stop heating. Then the above reaction solution was rotary evaporated under vacuum conditions to remove the solvent 1,4-dioxane and water; finally, the solution after rotary evaporation was purified with methanol four times to remove the upp...

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Abstract

The invention relates to a low-molecular hyperbranched oil-soluble thickened oil viscosity reducer for thickened oil recovery and gathering and transportation and viscosity reduction and a preparation method of the viscosity reducer. The defect that the conventional viscosity reducer is poor in viscosity reduction effect and high in cost is overcome. According to the technical scheme, the viscosity reducer comprises the following raw materials in percentage by mole: 10.0-15.8 percent of ethidene diamine, 42.0-50.0 percent of formaldehyde, 10.0-11.1 percent of acetophenone and 30.0-33.3 percent of butyl acrylate, wherein the amount of a solvent 1,4-dioxane accounts for 25-50 percent of the total mass of the previous four monomers. The preparation method comprises the following steps: adding the ethidene diamine, acetophenone, butyl acrylate and the solvent 1,4-dioxane into a flask; additionally adding the formaldehyde and residual solvent into a constant pressure titration funnel, introducing nitrogen protection into the flask, stirring, reacting at the temperature of 60-80 DEG C, and dripping the formaldehyde solution in the funnel, wherein the reaction time is 6-9 hours; and finally, performing rotary evaporation on the reaction solution, extracting, and drying, thereby obtaining the viscosity reducer. The viscosity reducer is good in viscosity reduction effect and high in oil solubility and can be mixed with a solvent.

Description

technical field [0001] The invention relates to the field of heavy oil exploitation and gathering and transportation, in particular to a low-molecular hyperbranched oil-soluble heavy oil viscosity reducing agent used for wellbore viscosity reduction and pipeline transportation viscosity reduction in the process of heavy oil exploitation and gathering and transportation, and a preparation method thereof . Background technique [0002] According to statistics, the total geological reserves of heavy oil discovered in the world are about 70 billion cubic meters, and the recoverable reserves are about 15 billion cubic meters. my country's heavy oil reserves rank seventh in the world, with geological reserves of about 25 billion tons, accounting for 28% of the entire geological reserves, mainly distributed in oil fields such as Liaohe, Xinjiang, Shengli, and North China. Heavy oil is a kind of unconventional crude oil with a degassed crude oil viscosity greater than 100 mPa·s at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58F17D1/17
Inventor 全红平徐为明王斌吴洋鲁雪梅叶晴
Owner SOUTHWEST PETROLEUM UNIV
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