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A method for obtaining the moving velocity of the gas-liquid phase interface in a micron capillary channel

A technology of interface movement and acquisition method, applied in the direction of surface/boundary effects, instruments, measuring devices, etc., can solve problems such as the inability to measure the number of capillaries, the inability to observe the movement process of the phase interface, and the inability to observe the phase interface.

Active Publication Date: 2020-01-17
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] But adopt above-mentioned two kinds of schemes all can't measure capillary number 10 -10 -5 and Bond number Bo-4 Dynamic contact angle under working conditions
[0008] In addition, in order to observe the contact angle, it is necessary to use a high-magnification microscope to obtain a magnified image, which means that the observation field of view is small
However, the dynamic displacement process means that the phase interface will move a certain distance, so high-magnification microscopes cannot observe the movement process of the phase interface
If a low magnification microscope is used to observe, the change of the position of the phase interface can be observed, but the phase interface cannot be observed, so the contact angle cannot be directly measured

Method used

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  • A method for obtaining the moving velocity of the gas-liquid phase interface in a micron capillary channel
  • A method for obtaining the moving velocity of the gas-liquid phase interface in a micron capillary channel
  • A method for obtaining the moving velocity of the gas-liquid phase interface in a micron capillary channel

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Embodiment Construction

[0111] Such as figure 1 As shown, the present invention provides a method for obtaining a gas-liquid phase interface in a micron capillary channel, which generally includes the following steps:

[0112] Step 100, install the microfluidic chip selected for measurement on the mobile seat of the mobile platform of the dynamic measurement device and connect the syringe pump, adjust and install the camera unit, and connect each device with the control system; first inject the test liquid into the microfluidic chip In the micron capillary channel above, the pressure of the current test liquid is measured, and the injection pressure of the syringe pump is controlled by the control system to meet the predetermined test pressure;

[0113] Such as figure 2 , 3 As shown in , 4 , the dynamic measurement device involved in this embodiment generally includes a microfluidic chip 20 , a pressure control pipeline 40 , a mobile platform 30 , a camera unit 50 and a control system 10 .

[011...

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Abstract

The invention provides a method for obtaining the movement speed of a gas-liquid phase interface in a micron capillary channel. According to the method provided by the invention, the control of pressure or flow velocity of a gas-liquid two-phase flow process in a micrometer-scale capillary vessel is realized through a dynamic testing device; a method for obtaining the phase interface and the phaseinterface velocity is given; the obtaining of the phase interface shape is realized for the first time under the conditions of low capillary number and low bond number; image processing method basedphase shape calculation and velocity calculation are adopted for the first time to ensure that the data processing efficiency and the measurement accuracy are greatly improved; and various algorithmsfor controlling the pressure control of the two-phase flow and the speed of an electric platform are also provided to improve the flexibility in actual operation and meet the requirements of various working conditions.

Description

technical field [0001] The invention relates to the field of enhanced petroleum exploitation, in particular to a method for acquiring the moving velocity of a gas-liquid dynamic displacement phase interface by using a dynamic measuring device equipped with a micron capillary channel. Background technique [0002] The mechanism of two-phase displacement in a single micron-scale capillary is the basis of two-phase displacement in porous media in natural environments. Two-phase displacement in porous media occurs in many industrial or natural processes, such as water in tight oil reservoirs. Gas drive, solution gas drive, water drive and other processes, the above-mentioned industrial processes are characterized by weak viscous force (the range of capillary number is 10 -10 <Ca<10 -5 ), weak gravity (Bond number Bo is less than 10 -4 ). The key factor affecting the displacement process is the capillary force, and the key parameter to calculate the capillary force is th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 雷达林缅江文滨曹高辉徐志朋李曹雄姬莉莉
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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