Viscosity reducer for heavy oil and its application and method for viscosity reduction of heavy oil

A heavy oil viscosity reducer and heavy oil technology, applied in the field of heavy oil viscosity reducer, can solve the problem of low viscosity reduction rate of heavy oil with high metal content

Active Publication Date: 2019-03-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing chemical viscosity reduction method is still not high in the viscosity reduction rate of heavy oil with high metal content.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example is used to illustrate the heavy oil viscosity reducer of the present invention and its application and method for heavy oil viscosity reduction.

[0031] Select heavy oil A with high metal content (viscosity at 30°C is 16000mPa·s, content of asphaltenes is 18% by weight, content of metal Ni+V is 300mg / kg), 50g is added to a beaker, and then 0.5g Thick oil viscosity reducer (the weight ratio of polybutyrylamide with a degree of polymerization of 24, nonylbenzenesulfonic acid and ethanol is 1:0.5:1, and the polybutyrylamide with a degree of polymerization of 24 was purchased from Shanghai Hongfei Chemical Co., Ltd. ), mixed uniformly at 20°C, left to react for 24h, and then measured by HAAKE VT550 at 30°C, its viscosity was 3200mPa·s, and the viscosity reduction rate was 80%.

Embodiment 2

[0033]This example is used to illustrate the heavy oil viscosity reducer of the present invention and its application and method for heavy oil viscosity reduction.

[0034] Choose high metal content heavy oil B (viscosity 20000mPa s when 30 ℃, the content of asphaltenes 19% by weight, the content of metal Ni+V 450mg / kg), get 50g and join in the beaker, add 0.4g heavy oil again Adhesive (the weight ratio of polyacrylamide with a degree of polymerization of 20, dodecylbenzenesulfonic acid and methanol is 1:1:2, and the polyacrylamide with a degree of polymerization of 20 was purchased from Shanghai Hongfei Chemical Co., Ltd.), in Mix well at 50°C, let it stand for 24 hours, then use HAAKE VT550 to measure its viscosity at 30°C as 2100mPa·s, and the viscosity reduction rate is 89.5%.

Embodiment 3

[0036] This example is used to illustrate the heavy oil viscosity reducer of the present invention and its application and method for heavy oil viscosity reduction.

[0037] Select heavy oil C with high metal content (the viscosity at 30°C is 34000mPa·s, the content of asphaltenes is 25% by weight, and the content of metal Ni+V is 800mg / kg), take 50g and add it to the beaker, then add 0.25g Thick oil viscosity reducer (the weight ratio of polyacrylamide with a degree of polymerization of 30 to polyacrylamide with a degree of polymerization of 30, butylbenzenesulfonic acid and propanol is 1:1:3, and polypropylene with a degree of polymerization of 30 The weight ratio of amide and polycrotonamide with a degree of polymerization of 30 is 1:1, polyacrylamide with a degree of polymerization of 30 and polycrotonamide with a degree of polymerization of 30 are purchased from Shanghai Hongfei Chemical Co., Ltd.), at 100 Mix evenly at ℃, let it stand for 24 hours, then use HAAKE VT550 t...

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Abstract

The invention relates to a thick-oil viscosity reducer. The thick-oil viscosity reducer contains an alkene amide polymer, an alkylaryl sulfonic acid and lower alcohol, wherein the weight ratio of the alkene amide polymer to the alkylaryl sulfonic acid to the lower alcohol is 1 to (0.5 to 3) to (1 to 5), and the carbon atom number of the lower alcohol is 1 to 4; and the thick-oil viscosity reducer is applied to the viscosity reduction of thick oil with high metal content, the viscosity of the thick oil with high metal content at the temperature of 30 DEG C is not lower than 10,000mPa.s, the content of asphaltenes is not lower than 10%, and the content of metals, i.e., Ni and V is not lower than 260mg / kg. The invention further relates to an application of the thick-oil viscosity reducer in the viscosity reduction of the thick oil with high metal content. The invention further relates to a thick-oil viscosity reduction method. The thick-oil viscosity reducer and the thick-oil viscosity reduction method, disclosed by the invention, have relatively high viscosity reduction rate to the thick oil with high metal content, and particularly, the viscosity reduction rate can reach up to 75% to 95%.

Description

technical field [0001] The invention relates to a heavy oil viscosity reducer, an application of the heavy oil viscosity reducer in heavy oil with high metal content, and a method for heavy oil viscosity reduction. Background technique [0002] With the rapid development of the world economy, the demand for oil continues to increase, the global oil reserves are decreasing, and the crude oil is becoming heavier and inferior. The United States "World Refining" magazine predicts that the average API degree of crude oil in the world will drop from 32.5 in 2000 to 32.3 in 2015, and the exploitation of heavy oil has attracted more and more attention. [0003] However, heavy oil has the characteristics of high viscosity, high density, and poor fluidity. These characteristics bring great difficulties to the exploitation and gathering of heavy oil. For example, the high viscosity and poor fluidity of heavy oil lead to large seepage resistance in the oil layer , so that the heavy oil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 刘必心龙军朱洪
Owner CHINA PETROLEUM & CHEM CORP
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