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Oil-soluble viscosity reducer for super heavy oil and preparation method of oil-soluble viscosity reducer

An oil-soluble viscosity reducer and viscosity reducer technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of carbamic acid derivatives, etc., can solve the problems of large fuel and power consumption, and achieve low cost and salt tolerance Good performance and good compatibility

Active Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, for the transportation of high-viscosity and high-condensation crude oil, traditional heating and emulsification methods have been mainly used at home and abroad. The former is intermittent heating along the oil pipeline, which consumes a lot of fuel and power; Dealing with (such as dehydration) problems

Method used

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  • Oil-soluble viscosity reducer for super heavy oil and preparation method of oil-soluble viscosity reducer
  • Oil-soluble viscosity reducer for super heavy oil and preparation method of oil-soluble viscosity reducer
  • Oil-soluble viscosity reducer for super heavy oil and preparation method of oil-soluble viscosity reducer

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0055] According to a more specific preferred embodiment, the preparation method of the viscosity reducer specifically includes the following steps:

[0056] (1) Add p-toluene isocyanate into the three-necked flask, then add the solvent, pass nitrogen gas for 3-10 minutes, then heat it in a water bath to 25-40°C, keep the temperature for 10-30 minutes, and slowly add polyethylene glycol dropwise with a constant pressure dropping funnel. Glycol, the dropping rate is 2-5 drops / min, after the dropping is completed, turn on the stirrer, the stirring rate is 500-800rpm, the solution changes from colorless to light yellow, after constant temperature reaction for 1-3h, stop heating, and get mixed liquid;

[0057] (2) Extract the above mixed solution with saturated saline and chloroform mixed solution for 3-5 times, combine the chloroform solution, add magnesium sulfate, dry for 10-20h, filter and distill off the solvent to obtain the final product which is the main ingredient of the ...

Embodiment 1

[0071] Embodiment 1 Viscosity reducer main agent C 1 preparation

[0072] (1) Add 1 mol of p-toluene isocyanate into a three-necked flask, then add 1331.5 g of chloroform, pass nitrogen gas for 3 minutes, then heat in a water bath to 25 ° C, keep the temperature for 10 minutes, and slowly add 1.0 mol of poly Ethylene glycol (n=40~50), the rate of addition is 2 drops / min, after the dropwise addition is completed, the stirrer is turned on, the stirring rate is 500rpm, the solution changes from colorless to light yellow, after constant temperature reaction for 1h, stop heating, get mixed solution;

[0073] (2) The above-mentioned mixed solution was extracted 4 times with saturated saline and chloroform mixed solution, the mass ratio of saturated saline and chloroform was 1:3, and the total single-time dosage was 66.88g. The chloroform solution was combined, and 6.66g of magnesium sulfate was added. Dry for 10 hours, filter and distill off the solvent under reduced pressure to o...

Embodiment 2

[0074] Embodiment 2 Viscosity reducer main agent C 2 preparation

[0075] (1) Add 1 mol of p-toluene isocyanate into a three-necked flask, followed by adding 1597.8 g of dichloromethane, blowing in nitrogen for 5 minutes, then heating in a water bath to 30°C, and after constant temperature for 22 minutes, slowly add 1.2 mol of poly Ethylene glycol (n=10~20), the rate of addition is 3 drops / min, after the dropwise addition is completed, the stirrer is turned on, the stirring rate is 650rpm, the solution changes from colorless to light yellow, after constant temperature reaction for 3h, stop heating, get mixed solution;

[0076] (2) The above-mentioned mixed solution is extracted 3 times with saturated saline and chloroform mixed solution, the mass ratio of saturated saline and chloroform is 1:3, and the single total dosage is 159.78g, the chloroform solution is combined, and 10.65g of magnesium sulfate is added, Dry for 16 hours, filter and distill off the solvent under norma...

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Abstract

The invention belongs to the field of preparation of auxiliaries for oilfield development, and particularly relates to an oil-soluble viscosity reducer for super heavy oil and a preparation method of the oil-soluble viscosity reducer. The oil-soluble viscosity reducer is prepared from the following components in percentage by weight: 10-30% of a viscosity reducer main agent, preferably 16%; 5-15% of a viscosity reducer auxiliary agent, preferably 10%; and the balance of solvent oil. The viscosity reducer main agent is prepared from p-toluene isocyanate and polyethylene glycol through a reaction, and the viscosity reducer auxiliary agent is one of tetrahydrofuran, hydroquinone and methylcyclohexane. The solvent oil is one of 120 # rubber solvent oil, 190 # washing solvent oil and 200 # paint solvent oil. The oil-soluble viscosity reducer is simple in preparation process, low in cost, high in oil reservoir adaptability and small in dosage, and the viscosity reduction rates of super-heavy oil and super-heavy oil can reach 98% or above and 95% or above respectively when the addition amount is 2 wt%. Therefore, the method can be widely applied to the exploitation of super heavy oil.

Description

technical field [0001] The invention belongs to the field of preparation of additives for oil field development, and in particular relates to an oil-soluble viscosity reducer for super heavy oil and a preparation method thereof. Background technique [0002] High density, high freezing point, high viscosity, and difficult flow are the outstanding characteristics of heavy oil resources, which seriously restrict the exploitation and transportation of heavy oil. For a long time, for the transportation of high-viscosity and high-condensation crude oil, traditional heating and emulsification methods have been mainly used at home and abroad. The former is intermittent heating along the oil pipeline, which consumes a lot of fuel and power; Deal with (such as dehydration) problems. These two methods are still the main methods for dealing with high-condensation and high-viscosity crude oil transportation. However, the method that has attracted the most attention from the domestic a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/333C07C269/02C07C269/08C07C271/28C09K8/588C09K8/88
CPCC08G65/33358C07C269/02C07C269/08C07C271/28C09K8/588C09K8/885
Inventor 蔡庆俊马天态荣雁高志卫刘京煊陈晓春岳继文鲁高敏
Owner CHINA PETROLEUM & CHEM CORP
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