Test device and method for research of rock pore scale multi-phase flow motion characteristic

Abstract

The invention discloses a test device and method for research of a rock pore scale multi-phase flow motion characteristic. The device comprises a flow control system, a visual observation imaging system, a micro-model, and a data collection analysis system, wherein a microscopic model of a natural soil pore replica serves as a study object, the flow control system comprises three high-accuracy programmable microinjection pumps and pipelines, and can provide accurate, stable flow input, the visual observation imaging system mainly comprises a test workbench, an optical microscope system, an LEDlight source, a microfluidic pressure sensor, a rotary fixture, a CMOS high-speed camera, and an auxiliary support system, the data collection analysis system can automatically save image data of thewhole test process, pressures of the inlet and the outlet of the micro-model, and environmental pressure value of peripheral pressure in real time, and after the test is completed, post-processing ofimage data is completed through self-programming so as to perform analysis. The test process is simple to operate, results can be shown visually, and the results are highly reliable.

Description

technical field [0001] The invention relates to the technical field of rock mass and soil seepage and multiphase flow at the pore scale, and specifically refers to a test device and method for studying the movement characteristics of rock pore scale multiphase flow. Background technique [0002] The flow characteristics of multiphase flow in porous media involve many natural processes and industrial production processes, such as the leakage of hydropower station dams, the restoration of groundwater systems with non-aqueous pollutants, enhanced oil and gas extraction, geological storage of carbon dioxide in deep saline layers, Geological storage of nuclear waste, etc. Therefore, it is of great significance to carry out corresponding laboratory experiments to reveal the movement characteristics and mesoscopic mechanism of multiphase flow at the pore scale. For the pore scale, due to the high precision requirements, the direct observation of the characteristic change process o...

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Problems solved by technology

[0003] In order to overcome the defects of the prior art, the object of the present invention is to provide a test device for the study of the motion characteristics of rock pore-scale multiphase flow, and provide the test method of the device, which mainly solves the problem that the pores cannot be accurately observed in the prior art. The problem of the movement characteristics and shape of multiphase fluids in pores at the scale

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