Micron capillary gas-liquid dynamic phase interface testing device

Abstract

The invention provides a micron capillary gas-liquid dynamic phase interface testing device. The device comprises a micro-flow chip provided with a micron capillary channel, a pressure control pipeline with a syringe pump and a pressure sensor, a mobile platform for controlling movement of the micro-flow chip and a camera shooting unit which obtains and outputs a phase interface image of testing liquid, an injection process of the syringe pump is controlled according to information of a pressure sensor, and a horizontal movement speed of the micro-flow chip and the movement speed of the testing liquid in the micro-flow chip are the same and in the opposite direction, so that the phase interface formed by the testing liquid is always maintained in a control system within the field of view of the camera shooting unit. The device achieves the control of the pressure or flow velocity of the gas-liquid two-phase flow process in micrometer-scale capillaries, achieves the dynamic contact angle measurement under the condition of low capillary number and low bond number for the first time, and greatly improves the data processing efficiency and measurement accuracy.

Description

technical field [0001] The invention relates to the field of enhanced oil extraction, in particular to an electric test platform that can automatically move synchronously according to the movement of the phase interface during the process of measuring the gas-liquid dynamic displacement in the micron capillary so that the phase interface remains relatively stationary. 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. For processes such as gas flooding, solution gas flooding, and water flooding, obtaining dynamic contact angle information under the above industrial conditions is crucial for evaluating the two-phase displacement process in the entire porous medium. [0003] Many experiments in the prior art have realized...

AI Technical Summary

Problems solved by technology

However, the dynamic displacement process means that the phase interface will move a certain distance, so the high-magnification microscope cannot observe the movement process of the phase interface

[0004] 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

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