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A kind of preparation method of desorbent and performance evaluation method thereof

An evaluation method and technology of desorbents, which are applied in chemical instruments and methods, drilling compositions, instruments, etc., can solve the problem of high shale oil, shale oil can not use conventional oil and gas production system and evaluation method, shale oil The problem of low oil availability, etc., can reduce adsorption, improve emulsifying and solubilizing capacity, and reduce pharmaceutical costs and operating costs.

Active Publication Date: 2022-02-01
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to complex geological conditions, low and ultra-low permeability characteristics of shale reservoir permeability and porosity, and poor reservoir physical properties such as high viscosity of shale oil, the effective degree of exploration and development of shale oil in my country is low. The development and utilization of shale oil cannot use the oil recovery system and evaluation method of conventional oil and gas. It is necessary to find a new type of oil recovery system and evaluation method suitable for shale oil, and strive for theoretical breakthroughs and technological progress.

Method used

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  • A kind of preparation method of desorbent and performance evaluation method thereof
  • A kind of preparation method of desorbent and performance evaluation method thereof
  • A kind of preparation method of desorbent and performance evaluation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0049] The present embodiment provides a kind of preparation method of desorbent, and described preparation method comprises:

[0050] Add 20g of nonionic surfactant, 18g of cationic surfactant and 18g of dispersant into the container and stir until uniform to obtain the first reactant;

[0051] Add 15g of white oil to the first reactant and stir until it becomes a milky white emulsion to obtain the second reactant;

[0052] Add 4g of water to the second reactant and stir until the emulsion becomes clear and transparent to obtain a desorbent concentrate;

[0053] Dilute the desorbent concentrate with 2.5wt% potassium chloride aqueous solution, and dilute the desorbent concentrate to 0.1wt% to obtain a desorbent.

[0054] The appearance of the desorbent prepared in this example is clear and transparent, the particle size is 6-15nm, the interfacial tension is 1-2mN / m, and the wetting angle is 30°-60°.

Embodiment 2

[0056] The present embodiment provides a kind of preparation method of desorbent, and described preparation method comprises:

[0057] Add 35g of nonionic surfactant, 25g of cationic surfactant and 25g of dispersant into the container and stir until uniform to obtain the first reactant;

[0058] Add 25g of white oil to the first reactant and stir until it becomes a milky white emulsion to obtain the second reactant;

[0059] Add 10 g of water to the second reactant and stir until the emulsion becomes clear and transparent to obtain a desorbent concentrate;

[0060] Dilute the desorbent concentrate with 2.5wt% potassium chloride aqueous solution, and dilute the desorbent concentrate to 0.1wt% to obtain a desorbent.

[0061] The appearance of the desorbent prepared in this example is clear and transparent, the particle size is 6-15nm, the interfacial tension is 1-2mN / m, and the wetting angle is 30°-60°.

Embodiment 3

[0063] The present embodiment provides a kind of preparation method of desorbent, and described preparation method comprises:

[0064] Add 30g of nonionic surfactant, 20g of cationic surfactant and 21g of dispersing agent into the container and stir until uniform to obtain the first reactant;

[0065] Add 18g of white oil to the first reactant and stir until it becomes a milky white emulsion to obtain the second reactant;

[0066] Add 8g of water to the second reactant and stir until the emulsion becomes clear and transparent to obtain a desorbent concentrate;

[0067] Dilute the desorbent concentrate with 2.5wt% potassium chloride aqueous solution, and dilute the desorbent concentrate to 0.1wt% to obtain a desorbent.

[0068] The appearance of the desorbent prepared in this example is clear and transparent, the particle size is 6-15nm, the interfacial tension is 1-2mN / m, and the wetting angle is 30°-60°.

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Abstract

The invention provides a preparation method of a desorbent, the preparation method comprising: adding a nonionic surfactant, a cationic surfactant and a dispersant into a container for stirring, and stirring until uniform to obtain a first reactant; Add white oil to the first reactant and stir until it becomes a milky white emulsion to obtain a second reactant; add water to the second reactant and stir until the emulsion becomes clear and transparent to obtain a concentrated desorbent liquid; the desorbent concentrated solution is diluted with potassium chloride aqueous solution to obtain a desorbent. In addition, a desorbent performance evaluation method is also provided. The desorbent prepared by the present invention has nanoscale micelles, which can reduce the injection pressure, effectively enter the small pore throats of shale without Jamin effect, improve the sweep efficiency, and drive more Multi-adsorbed shale oil reduces the adsorption of shale oil on the shale surface and improves the production degree of shale oil.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a method for preparing a desorbent and a method for evaluating its performance. Background technique [0002] The occurrence state of shale oil in the reservoir is mainly in three forms: adsorption state, free state and dissolved state. However, due to complex geological conditions, low and ultra-low permeability characteristics of shale reservoir permeability and porosity, and poor reservoir physical properties such as high viscosity of shale oil, the effective degree of exploration and development of shale oil in my country is low. The development and utilization of shale oil cannot use the oil recovery system and evaluation method of conventional oil and gas. It is necessary to find a new type of oil recovery system and evaluation method suitable for shale oil, and strive for theoretical breakthroughs and technological progress. Contents of the invention [0003] The object o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C09K8/60G01N13/02G01N33/00
CPCC09K8/584C09K8/604G01N33/00G01N13/02G01N2013/0208
Inventor 屈鸣侯吉瑞刘飏赵宝顺
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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