Measuring method for contact angle of gas-liquid phase interface in micrometer capillary passage

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

Active Publication Date: 2019-01-11
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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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

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  • Measuring method for contact angle of gas-liquid phase interface in micrometer capillary passage
  • Measuring method for contact angle of gas-liquid phase interface in micrometer capillary passage
  • Measuring method for contact angle of gas-liquid phase interface in micrometer capillary passage

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Embodiment Construction

[0112] Such as figure 1 As shown, the invention provides a method for measuring the contact angle of the gas-liquid phase interface in a micron capillary channel, which generally includes the following steps:

[0113] Step 100, installing the microfluidic chip selected for measurement on the mobile seat of the mobile platform of the dynamic measurement device and connecting the syringe pump, adjusting and installing the camera unit, and connecting each device with the control system at the same time;

[0114] 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 .

[0115] The microfluidic chip 20 is used for passing the test liquid, and is provided with a micron capillary channel 21; the specific microfluidic chip 20 may be a plate-shaped structure made of glass, organic material, or the lik...

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Abstract

The invention provides a measuring method for a contact angle of a gas-liquid phase interface in a micrometer capillary passage. The pressures or flow speeds of flowing processes of a gas phase and aliquid phase in a micrometer-scale capillary are controlled by using a dynamic testing device, and the dynamic contact angle measurement in the states of small capillary number and small Bond number is realized for the first time. The measurement for the contact angle and phase interface speed based on an image processing method is firstly adopted, so that the data processing efficiency and the measuring precision are greatly improved. The invention further provides various algorithms for controlling the pressure of a two-phase flowing process and the speed of an electric platform, so that theflexibility during actual operation is improved, and furthermore, demands under various working conditions are met.

Description

technical field [0001] The invention relates to the field of enhanced petroleum exploitation, in particular to a method for obtaining the contact angle of the 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...

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Application Information

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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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