A kind of preparation method of novel heavy oil viscosity reducer

A heavy oil viscosity reducer, a new type of technology, applied in the field of preparation of new heavy oil viscosity reducer, can solve the problem of lack of viscosity reducer in extra thick crude oil

Active Publication Date: 2022-01-25
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are various viscosity reducers in the prior art, there is still a lack of efficient and stable viscosity reducers for extra viscous crude oil

Method used

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  • A kind of preparation method of novel heavy oil viscosity reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Add 0.1mol 1,4-diazacyclohexane and 100ml absolute ethanol to a 500ml three-necked reaction flask, cool to 0°C, and slowly add 0.1mol 1,2,3,5-tetra-p-toluenesulfonic acid inosoline under stirring Alcohol ester, keep the temperature below 4°C, it takes 2 hours, continue to stir and keep warm for 3 hours after the addition is complete; slowly add 0.2mol N,N-dimethyl behenyl tertiary amine and 50ml of absolute ethanol dropwise, need After 1 hour, add 30ml of distilled water, raise the temperature to 55°C, and stir for 3 hours to obtain a light yellow viscous liquid.

Embodiment 2

[0010] The crude oil sample is very thick crude oil from Tahe Oilfield in Xinjiang, and its viscosity at 85°C is measured by BROOKFILD DV-III+ rheometer to be 32500mPa·s. The product prepared in Example 1 is prepared into aqueous solutions with different chemical concentrations , with the mass ratio of oil to water being 7:3, the drug solution was added to the crude oil, the temperature was raised to 85°C, left standing for 24h, gently shaken for 5min, and the viscosity of the emulsion was measured at 85°C. Treated crude oil viscosity and viscosity reduction rate are as shown in Table 1 below, as can be seen from Table 1, the product prepared in Example 1 significantly reduced the viscosity of Xinjiang Tahe extra thick crude oil, and when the drug concentration was greater than 0.05%, Viscosity reduction effect is very obvious.

[0011] Table 1 Viscosity-reducing effect of different concentrations of the reagents of Example 1 on Tahe heavy oil

[0012]

Embodiment 3

[0014] The product prepared in Example 1 was used to prepare an aqueous solution with a mass percentage of 0.05%. Using conditions similar to those described in Example 2, at 85°C, treat heavy oil samples with different viscosities with the prepared medicament solution, and measure the viscosity of the heavy oil before and after treatment at 85°C. The results are shown in Table 2 . It can be seen from Table 2 that the viscosity reducer of the present invention can effectively reduce the viscosity of different types of heavy oil.

[0015] Table 2 The viscosity-reducing effect of the agent in Example 1 on heavy oil samples with different viscosities

[0016] crude oil sample Crude oil viscosity, mPa·s Crude oil viscosity after treatment, mPa·s Viscosity reduction rate, % 1# 45180 208 99.5 2# 32500 161 99.5 3# 20845 120 99.4 4# 12380 106 99.1 5# 8590 102 98.8 6# 3621 85 97.7

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Abstract

The present invention relates to a kind of by 1,2,3,5-tetra-toluenesulfonate inositol ester, 1,4-diazacyclohexane and N, N-dimethyl behenyl tertiary amine A method for preparing a necklace-type active polymer viscidity reducer for heavy oil from raw materials. In the present invention, at first 1,2,3,5-tetra-toluenesulfonate inositol ester is polymerized with an equivalent amount of 1,4-diazacyclohexane, and then doubled with N,N-dimethyl An amphiphilic polymer with a special main chain structure was prepared by reacting docosyl tertiary amine. The polymer has remarkable ability to reduce the viscosity of asphaltene heavy oil, the preparation process is reliable, and a preparation method of a novel heavy oil viscosity reducer is provided.

Description

technical field [0001] The invention belongs to the field of oil recovery additives for oilfields, in particular to a 1,2,3,5-tetra-toluenesulfonate inositol ester, 1,4-diazacyclohexane and N,N-dimethyl The invention discloses a method for preparing a novel heavy oil viscosity reducer with behenyl tertiary amine as the main raw material. Background technique [0002] In recent years, with the continuous increase of heavy oil production, the exploitation of extra-high viscosity heavy oil has brought great difficulties to the extraction and transportation of crude oil. The key to the development of heavy oil is to reduce the viscosity of crude oil and improve its fluidity. Although there are various viscosity reducers in the prior art, there is still a lack of efficient and stable viscosity reducers for extra viscous crude oil. [0003] The viscosity of heavy oil is mainly due to the strong intermolecular interaction between asphaltenes and colloids. Reducing or eliminating t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06C09K8/524
CPCC09K8/524C08G73/0633
Inventor 麻金海孔淑玲方龙
Owner QINGDAO UNIV
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