Heavy oil viscosity reducer and preparation method thereof

A heavy oil viscosity reducer, ionic liquid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of heavy oil recovery factor, harsh reaction conditions, low viscosity reduction rate of heavy oil, etc. Achieving the effect of good salt resistance

Inactive Publication Date: 2017-09-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction temperature of hydrothermal catalytic cracking is generally between 200°C and 300°C, and the reaction is generally realized by injecting water vapor and catalyst into the oil layer; the reaction conditions are relatively harsh and the reaction temperature is high. Serious impact on heavy oil recovery
In addition, the viscosity reduction rate of modified heavy oil is much lower than that of emulsified viscosity reduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The invention provides a preparation method of the above heavy oil viscosity reducer, the method comprising: mixing and stirring component A, component B, component C and water.

[0027] Wherein, the mixing and stirring conditions may be conventional conditions in the art, as long as the components are mixed uniformly. Preferably, the mixing and stirring conditions include: the temperature is room temperature, and the time is 5-30 minutes.

Embodiment 1

[0030] This embodiment relates to a viscosity reducer for heavy oil. According to mass percentage, the viscosity reducer includes: a mixture of 3% sodium nitrite, sodium bicarbonate and ammonium bicarbonate (the mass ratio of the three is 1: 1:1), 0.3% nonylphenol polyoxyethylene polyoxypropylene alcohol ether, 0.5% [Et 3 NH]FeCl 3 , and the balance is simulated formation water.

[0031] Get 21 grams of the above-mentioned heavy oil viscosity reducer and add it to 49 grams of heavy oil with a viscosity of 2110mPa·s at 50°C. After stirring for 30 minutes at 50°C, test the viscosity of the heavy oil with a Brookfield DVⅢ rheometer. The oil viscosity is 15.5mPa·s, and the viscosity reduction rate is 99.27%.

Embodiment 2

[0033] This embodiment relates to a viscosity reducer for heavy oil. In terms of mass percentage, the viscosity reducer includes: 5% mixture of sodium nitrite, ammonium carbonate and sodium bicarbonate (the mass ratio of the three is 1:1: 0.5), 0.5% nonylphenol polyoxyethylene polyoxypropylene alcohol ether, 1% [Et 3 NH]AlCl 4 , and the balance is simulated formation water.

[0034] Get 21 grams of the above-mentioned thick oil viscosity reducer and add it to 49 grams of thick oil with a viscosity of 2551mPa·s at 50°C. After stirring for 30 minutes at 50°C, test the viscosity of the thick oil with a Brookfield DVⅢ rheometer. The oil viscosity is 11.3mPa·s, and the viscosity reduction rate is 99.56%.

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Abstract

The invention provides a heavy oil viscosity reducer. Based on the total weight of the heavy oil viscosity reducer, the heavy oil viscosity reducer is prepared from 1 to 15 percent by weight of component A, 0.1 to 1.5 percent by weight of component B, 0.1 to 5 percent by weight of component C and water, totaling 100 percent, wherein the component A is at least two of ammonium nitrite, sodium carbonate, sodium bicarbonate, ammonium bicarbonate and ammonium carbonate; the component B is alkylphenoxy polyoxyethylenepolyoxypropylene; the component C is an alkyl imidazole ionic liquid and/or a quaternary ammonium salt ionic liquid. The invention further provides a preparation method of the heavy oil viscosity reducer. The method comprises: mixing and stirring the component A, the component B, the component C and the water. By adopting the heavy oil viscosity reducer, the viscosity of heavy oil can be lowered remarkably; meanwhile, irreversible modification and viscosity reduction can be performed on the thick oil to transform a heavy component of the thick oil to a light component, so that the thick oil recovery efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of heavy oil exploitation, and more specifically relates to a heavy oil viscosity reducer and a preparation method thereof. Background technique [0002] Heavy oil is a complex multi-component homogeneous organic mixture with high colloid and asphaltene content, low light component content, low straight-chain hydrocarbon content, high viscosity, and poor fluidity. Poor fluidity in surface transportation pipelines makes heavy oil production, gathering, transportation and processing difficult. [0003] At present, domestic and foreign heavy oil viscosity reduction technologies mainly include: thermal viscosity reduction, thin oil viscosity reduction, emulsification viscosity reduction, catalytic modification and ultrasonic viscosity reduction, etc. [0004] The emulsification viscosity reduction technology has the characteristics of strong operability in field implementation, flexible and diverse technologies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/58
CPCC09K8/584C09K8/58
Inventor 刘平许关利王友启周国华王锐马涛谭中良海玉芝卢刚崔茂蕾
Owner CHINA PETROLEUM & CHEM CORP
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