Desorption measurement device and method for contents of coal bed gas and shale gas

Abstract

The invention discloses a desorption measurement device and a desorption measurement method for contents of coal bed gas and shale gas. The desorption measurement device comprises a self-crushing desorption tank, a bidirectional rotating motor, a metering tank, a reference tank, a sampling tank, a vacuum pump, an electronic differential pressure gauge, an electric heating bath and a cooling tank.Through use of the desorption measurement device and the desorption measurement method for desorption measurement on the contents of coal bed gas and shale gas, efficient and continuous desorption ofcoal bed gas and shale gas can be achieved, gas loss during the desorption measurement is eliminated, the desorption efficiency and the gas metering accuracy are improved, content parameters of the coal bed gas and the shale gas can be accurately obtained, and accurate basic parameters are provided for exploration and development of the coal bed gas and the shale gas.

Description

technical field [0001] The invention relates to the technical field of exploration and development of coalbed methane and shale gas, in particular to a device and method for measuring desorption of coalbed methane and shale gas content. Background technique [0002] Coalbed methane refers to the hydrocarbon gas stored in coal seams with methane as the main component, mainly adsorbed on the surface of coal matrix particles, and partially free in coal pores or dissolved in coal seam water. It is an associated mineral resource of coal and belongs to unconventional Natural gas is a clean, high-quality energy and chemical raw material that has risen internationally in the past ten or twenty years. Shale gas refers to unconventional natural gas that occurs in organic-rich shale-dominated reservoir rock series. It is continuously generated biochemical gas, thermogenic gas or a mixture of both, and can exist in natural fractures in a free state. In the pores and pores, some exist o...

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Problems solved by technology

[0004] At present, there are devices and methods for measuring the content of coalbed methane and shale gas in the world, but there are deficiencies. The method given by the national standard is to first desorb naturally in the desorption tank, and then take it out of the desorption tank and put it into the grinding tank Grinding and pulverizing in a desorption tank, and then putting it into a desorption tank for desorption. Due to the limitation of the equipment and the influence of the method, the coal rock (or shale) needs to be poured repeatedly. This process will cause a large amount of methane gas loss, making the measurement There is a large error between the result and the actual gas content

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