Visual coal bed gas dissipation simulating device and using method thereof

Abstract

The invention discloses a visual coal bed gas dissipation simulating device and a using method thereof. The visual coal bed gas dissipation simulating device comprises a coal bed gas reservoir simulating device, a coal bed gas source simulating device and a shaft simulating device. The coal bed gas reservoir simulating device comprises a transparent cuboid glass box. A fine sand saturated water layer, an intermediate sand saturated water layer, a fine sand unsaturated water layer and a rubber baffle layer are arranged in the glass box sequentially from bottom to top. The coal bed gas source simulating device comprises two air cylinders. The shaft simulating device comprises a water suction pump, a water meter and a gas meter. The visual coal bed gas dissipation simulating device can simulate different types of reservoirs under a coal bed gas mining site as well as simulating the conditions of fluid contained in the reservoirs, can control the reservoir pressures to form pressure differences and release gas so as to simulate the coal bed gas desorbing process, and can also observe the dissipation process of coal bed gas and meter and consider the coal bed gas recovery rate in the dissipation process automatically in real time.

Description

technical field [0001] The invention belongs to the technical field of coalbed methane exploration and development, and in particular relates to a visualized coalbed methane escape simulation device and its use method, which can realize the simulation of different types of reservoirs under experimental conditions, and utilize the characteristics of forming pressure differences to cause gas escape , the recovery factor of the coalbed methane reservoir considering the escape process is obtained through the measurement of the gas meter, which provides technical support for the coalbed methane production site. Background technique [0002] The escape of coalbed methane refers to the phenomenon that coalbed methane escapes from the coal seam to the surrounding rock in a free or dissolved state. Although most coalbed methane reservoirs are in an undersaturated adsorption state and there is no free gas in coal seams, the amount of hydrocarbon generation in coal rocks is far greater...

AI Technical Summary

Problems solved by technology

The escape of coalbed methane during the mining process will affect the recovery rate of coalbed methane, and there are few studies on the escape of coalbed methane

Images