Experimental device for the generation and migration of pulverized coal under ultrasonic loading

Abstract

The invention discloses an experimental device for coal powder production and migration rules under ultrasonic wave loading, and relates to the technical field of experiments on coal powder production and migration. The experimental device comprises a core holder, wherein the core holder is placed in a water bath thermostat; the water bath thermostat is connected with a constant temperature circulation system; an ultrasonic wave loading system is mounted on the water bath thermostat; the core holder is provided with an axial pressure injection opening, a confining pressure injection opening, a fluid inlet and a leading-out opening; the fluid inlet is connected with a core displacement system; the axial pressure injection opening and the confining pressure injection opening are correspondingly connected with a pressurizing system; the leading-out opening is connected with a gas-liquid-solid separation and metering system; the gas-liquid-solid separation and metering system is connected with a vacuum-pumping system; the core holder is connected with an image and fluctuation detecting system. The experimental device has the advantages as follows: the ultrasonic wave loading conditions of different directions, different frequencies and different power values, the conditions of constant temperature and triaxial stress, and the constant speed conditions of gas-water phases and single-phase fluid can be provided to observe the influence of the ultrasonic wave on the coal powder production, the variation rule of migration path of coal powder and the like.

Description

technical field [0001] The invention relates to the technical field of pulverized coal generation and migration experiments, in particular to an experimental device for the generation and migration of pulverized coal under ultrasonic loading. Background technique [0002] Over the past 10 years of commercial development of coalbed methane in my country, the output of single wells of coalbed methane is generally low, which is caused by geological failures, technical means, construction, drainage systems and other reasons. Due to the relatively complex geological conditions in my country and the development of tectonic coal, coal powder plugging has become one of the main geological faults in coalbed methane drainage. The source of pulverized coal is not only related to the structure, but technical construction such as hydraulic pressure will also produce a large amount of pulverized coal while creating fractures in the coal reservoir. Any turbulence such as stopping the pump...

AI Technical Summary

Problems solved by technology

However, there is no report on the research on the output and migration of pulverized coal by ultrasonic waves.

At present, there are relatively few experimental equipments for coal powder research in my country, and there is even a lack of research on the promotion of coal powder output and migration by ultrasonic waves.

Images