Coal bed gas micro-displacement process fluid dynamics test method and system

Abstract

Embodiments of the present application provide a coalbed gas micro-displacement process fluid dynamics test method and system. Applied to the field of fluid dynamics test technology, the method comprises: applying a preset pressure to the stored coalbed gas to be tested by a pressurizing device to form a single-phase or multi-phase gas flow environment simulating coalbed gas displacement in a transparent substrate; adjusting the laser wavelength to match the absorption characteristics of the target coalbed gas molecules; then expanding and shaping the laser beam into a two-dimensional thin layer light plane through a beam shaping device, and directing the two-dimensional thin layer onto the single-phase or multi-phase gas flow environment; capturing the light plane after passing through the gas area to obtain a light intensity distribution image; and converting the two-dimensional concentration distribution map of the coalbed gas in the real coalbed pore structure through image processing. In this way, the technical problem that the coalbed gas injection cannot be studied by microfluidic technology to study the multiphase fluid interaction characteristics and flow rules can be solved.

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