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

A technology of viscosity reducer and heavy oil, which is applied in chemical instruments and methods, earth drilling and drilling compositions, etc. It can solve the problems of difficult control of polymerization degree, complicated polymer operation, adverse environmental impact, etc., and achieve cost reduction Inexpensive, easy to prepare, cheap effect

Active Publication Date: 2022-04-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned existing oil-soluble viscosity reducers are mainly developed on the basis of pour point depressants, mainly for viscosity reduction and solvent dilution of high molecular polymers. It is also not easy to control, and the polymer and molecular weight have a certain influence on the viscosity reduction effect, the preparation is difficult, and the unreacted monomer or the solvent used will have an adverse impact on the environment

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This example is used to illustrate the heavy oil viscosity reducer and the heavy oil viscosity reducer method of the present invention.

[0063] (1) Preparation of heavy oil viscosity reducer

[0064] At 40°C, add 0.5g of perfluorooctanesulfonyl fluoride to 10g of cardanol and stir for 30 minutes to dissolve it, then add 0.5g of TX-4 to it, and continue stirring for 2 minutes to obtain thick oil viscosity reducer A1 .

[0065] (2) Thick oil viscosity reduction

[0066] Add 0.6g of thick oil viscosity reducer A1 to 20g of thick oil-I, then stir and dissolve at 200°C for 4 hours to obtain a mixed oil.

[0067] The dynamic viscosity of the mixed oil at 50°C and the stability results after aging for 10 days at 190°C are shown in Table 1.

Embodiment 2

[0069] This example is used to illustrate the heavy oil viscosity reducer and the heavy oil viscosity reducer method of the present invention.

[0070] (1) Preparation of heavy oil viscosity reducer

[0071] At 20°C, 0.1 g of perfluorooctanoic acid was added to 10 g of cashew nut shell oil and stirred for 10 minutes to dissolve it, then 0.1 g of TX-7 was added thereto, and the stirring was continued for 5 minutes to obtain thick oil viscosity reducer A2.

[0072] (2) Thick oil viscosity reduction

[0073] Add 0.1 g of heavy oil viscosity reducer A2 to 20 g of heavy oil-II, then stir and dissolve at 120°C for 4 hours to obtain a mixed oil.

[0074] The dynamic viscosity of the mixed oil at 50°C and the stability results after aging for 10 days at 190°C are shown in Table 1.

Embodiment 3

[0076] This example is used to illustrate the heavy oil viscosity reducer and the heavy oil viscosity reducer method of the present invention.

[0077] (1) Preparation of heavy oil viscosity reducer

[0078] At 30°C, add 1.0g of methyl perfluorooctanoate to the mixture of 5g of cashew nut shell liquid and 5g of cardanol and stir for 30 minutes to dissolve it, then add 1.0g of TX-4 to it, and continue stirring for 2 minutes to obtain a thick Oil viscosity reducer A3.

[0079] (2) Thick oil viscosity reduction

[0080] Add 1 g of thick oil viscosity reducer A3 to 20 g of thick oil-III, and stir and dissolve at 200°C for 4 hours to obtain a mixed oil.

[0081] The dynamic viscosity of the mixed oil at 50°C and the stability results after aging for 10 days at 190°C are shown in Table 1.

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Abstract

The invention relates to the technical field of heavy oil viscosity reduction, and discloses a heavy oil viscosity reduction agent and its application and a method for heavy oil viscosity reduction. The heavy oil viscosity reducer contains phenolic compounds, penetrants and stabilizers, and the phenolic compounds are cardanol and / or cashew nut shell liquid. Using the heavy oil viscosity reducer of the present invention to reduce the viscosity of heavy oil can effectively reduce the dynamic viscosity of heavy oil, and after viscosity reduction, the heavy oil can remain stable for a long time under high temperature conditions. The viscosity reducer has the advantages of low cost, simple preparation and Environmentally friendly features.

Description

technical field [0001] The invention relates to the technical field of viscosity reduction of heavy oil, in particular to a viscosity reduction agent for heavy oil and its application and a method for viscosity reduction of heavy oil. Background technique [0002] With the increasing demand for oil and the constant consumption of ordinary crude oil, the extraction of heavy oil is becoming more and more important. Heavy oil resources are abundant in the world, which is a huge potential resource and will play an increasingly important role in future crude oil production. Among them, my country's Shengli Oilfield, Liaohe Oilfield, Tahe Oilfield, and Zhongyuan Oilfield Reservoirs are very rich in geological resources, reducing the viscosity of heavy oil is the main problem to be solved in the process of heavy oil development and lifting. [0003] Chemical viscosity reduction is one of the more commonly used heavy oil production methods, mainly including emulsification viscosity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584E21B43/22
CPCC09K8/584E21B43/16
Inventor 高敏江建林李财富余伟发
Owner CHINA PETROLEUM & CHEM CORP
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