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A method for integrating production and transportation of heavy oil with hydrothermal catalytic upgrading and viscosity reduction

A technology of modification and viscosity reduction and thermal catalysis, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well parts, etc., which can solve the problems of complex process and high catalytic modification temperature, and achieve simple process and good viscosity reduction effect , to reduce the effect of gravity resistance

Active Publication Date: 2015-08-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this technology is complicated, distillation is required and the temperature of catalytic modification is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Using the method of the preferred embodiment of the present invention, a certain oilfield heavy oil (with a viscosity of 8800 mPa.s at 50°C and a water content of 9.36%) is exploited and hydrothermally catalytically upgraded to reduce viscosity. The test conditions and test results are as follows.

[0034] Blending thinner and reducing viscosity: The mass ratio of the viscosity-reducing oil to the thick oil used for mixing is 1:5, and the viscosity of the produced thinner and thick oil is 765mPa.s.

[0035] Hydrothermal catalytic upgrading: the catalyst is nickel sulfate, the dosage is 0.05wt% of the weight of the thin heavy oil; the hydrogen donor is tetralin, the dosage is 0.5wt% of the weight of the thin heavy oil; the reaction temperature is 160℃, the reaction The time is 6h; after the reaction, a part of the viscosity-reducing oil is returned to the wellbore of the oil well according to the above-mentioned mixing ratio for mixing and viscosity-reducing, and the remainin...

Embodiment 2

[0037] The method of the preferred embodiment provided by the present invention is used to exploit and reduce the viscosity of a certain oil field heavy oil (with a viscosity of 12780 mPa.s at 50°C and a water content of 15.78%). The test conditions and test results are as follows.

[0038] Blending thinner and reducing viscosity: The mass ratio of the viscosity-reducing oil to the thick oil used for mixing is 1:3, and the viscosity of the produced thinner and thick oil is 2645mPa.s.

[0039] Hydrothermal catalytic upgrading: the catalyst is ferrous acetylacetonate, the dosage is 0.05wt% of the weight of thin heavy oil; the hydrogen donor is formic acid, the dosage is 1.0wt% of the weight of thin heavy oil; the reaction temperature is 200℃, The time is 12h; after the reaction, part of the viscosity-reducing oil is returned to the wellbore of the oil well according to the above-mentioned mixing ratio for mixing and viscosity-reducing, and the remaining part is exported. The viscosi...

Embodiment 3

[0041] The method of the preferred embodiment provided by the present invention is used to exploit and reduce the viscosity of a certain oil field heavy oil (50°C viscosity of 30780 mPa.s, water content of 5.13%). The test conditions and test results are as follows.

[0042] Blending thinner and reducing viscosity: The mass ratio of the viscosity-reducing oil to the heavy oil used for mixing is 1:2, and the viscosity of the produced thinning and thick oil is 4459mPa.s.

[0043] Hydrothermal catalytic upgrading: the catalyst is vanadyl sulfate, the dosage is 0.2wt% of the weight of thin heavy oil; the auxiliary is cyclohexanone, the dosage is 1.0wt% of the weight of thin heavy oil; the reaction temperature is 240℃, and the reaction The time is 24h; after the reaction, a part of the viscosity-reducing oil is returned to the wellbore of the oil well according to the above-mentioned mixing ratio for mixing and viscosity-reducing, and the rest is transported. The viscosity of the reduc...

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Abstract

The invention relates to a hydrothermal catalytic modification, viscosity reduction, recovery and transportation integrated method for heavy oil. The method comprises a step of carrying out hydrothermal catalytic modification by using recovered light-oil-mixed heavy oil and a step of carrying out light-oil-mixed viscosity-reduction heavy oil recovery by using viscosity-reduced oil obtained through hydrothermal catalytic modification. According to the method disclosed by the invention, the viscosity of the heavy oil is lowered, so that the heavy oil can meet the requirements of recovery and transportation; and the quality of the heavy oil is improved, and thus, the further processing of the heavy oil is favored.

Description

Technical field [0001] The invention relates to a method for integrated production and transportation of heavy oil hydrothermal catalytic upgrading and viscosity reduction. Background technique [0002] With the depletion of conventional crude oil, the development and utilization of heavy oil resources has become more and more important. However, although heavy oil resources are abundant, the composition of heavy oil is complex, the content of heavy components is high, and the viscosity is high, resulting in poor fluidity of heavy oil in wellbore and surface transportation pipelines, which in turn leads to difficulties in heavy oil production, gathering, and processing. [0003] In my country, heavy oil refers to crude oil with a viscosity greater than 50mPa.s at the temperature of the oil layer. According to the viscosity, heavy oil can be further divided into ordinary heavy oil (50~10000mPa.s), extra heavy oil (10000~50,000mPa.s), super heavy oil Heavy oil (above 50000mPa.s). Du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22E21B43/24
Inventor 李本高黄娟秦冰雷斌
Owner CHINA PETROLEUM & CHEM CORP
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