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Method for modification and viscosity breaking of thick oil through hydrothermal catalysis

A modified viscosity reduction, thermal catalysis technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor fluidity, high content of heavy components, high viscosity, etc., to reduce the content of heteroatoms, The effect of reducing costs and improving quality

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although heavy oil resources are abundant, it is difficult to develop and utilize them, mainly due to the complex composition of heavy oil, high content of heavy components, high viscosity, and poor fluidity, which lead to difficulties in mining, gathering, transportation, and processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the autoclave, add heavy oil (viscosity at 50°C is 11690mPa.s) and water according to the mass ratio of 5:1, and simultaneously add 0.15wt% catalyst cobalt nitrate and 1.5wt% 2,4 -Hexanedione, after reacting at 300°C for 24h, let stand to cool to room temperature, carry out oil-water separation, take an oil sample and measure its viscosity at 50°C as 2083mPa.s, and the content of asphaltene decreased by 3.8%.

Embodiment 2

[0026] In the autoclave, add a certain oil field heavy oil (50 DEG C viscosity is 2755mPa.s) and water according to the ratio of mass ratio 10:1, add the catalyst nickel acetate of 0.1wt% heavy oil quality and the acetylacetone of 1.0wt% simultaneously, After reacting at 120°C for 48h, let it stand and cool to room temperature, separate oil from water, take an oil sample and measure its viscosity at 50°C to be 841mPa.s, and the content of asphaltene decreased by 2.2%.

Embodiment 3

[0028] In the autoclave, add a certain oilfield heavy oil (viscosity at 50°C is 25930mPa.s) and water according to the mass ratio of 10:3, and add 0.05wt% catalyst vanadyl sulfate and 3.0wt% acetoacetate at the same time Ethyl ester, after reacting at 240°C for 18h, let it stand and cool to room temperature, separate oil from water, take an oil sample and measure its viscosity at 50°C to be 4633mPa.s, and the content of asphaltene decreased by 4.0%.

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Abstract

The invention relates to a method for modification and viscosity breaking of thick oil through hydrothermal catalysis. The method comprises the following steps: reacting thick oil at 120-300 DEG C in the presence of water, a catalyst and an additive, wherein the additive can be one or more of C5-C10 ketone and C5-C10 ester. The method provided by the invention can convert heavy components of the thick oil to light components so as to significantly reduce the viscosity of the thick oil and reduce the density of the thick oil, reduce the heteroatom content, and improve the quality of the thick oil.

Description

technical field [0001] The invention relates to a method for hydrothermal catalytic modification and viscosity reduction of heavy oil. Background technique [0002] With the continuous development of oil fields, thin oil resources continue to decrease. Although heavy oil resources are abundant, it is difficult to develop and utilize them, mainly because of the complex composition, high content of heavy components, high viscosity, and poor fluidity of heavy oil, which lead to difficulties in mining, gathering, transportation, and processing. In my country, heavy oil refers to crude oil with a viscosity greater than 50mPa.s at the reservoir temperature. According to the viscosity, heavy oil can be further divided into ordinary heavy oil (50-10000mPa.s), extra heavy oil (10000-50000mPa.s), super heavy oil (10000-50000mPa.s), Heavy oil (above 50000mPa.s). The key to improving heavy oil recovery and solving the problem of gathering and transportation is to reduce the viscosity o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/592
Inventor 李本高黄娟秦冰雷斌
Owner CHINA PETROLEUM & CHEM CORP
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