Portable tester for shale gas and coal bed gas

Abstract

The invention relates to a portable tester for shale gas and coal bed gas, which is applied to the test of content of the coal bed gas and the shale gas. A bottom plate is fixed on the lower part in a box body and is parallel to a box bottom; a panel is fixed at an upper opening of the box body; a cylindrical barrel is fixed on the upper plane of the bottom plate and is vertical to the bottom plate; springs are uniformly distributed and welded and fixed on the top of the cylindrical barrel and are vertical to the end face of the cylindrical barrel; a top plate is fixed on the tops of the springs; the panel is provided with a round hole; the top plate is arranged on the upper part of the panel; the bottom of a closed tank is welded on the upper plane of the top plate; the top of a variable frequency alternating current motor is welded on the lower plane of the top plate; and the variable frequency alternating current motor is arranged in the cylindrical barrel. The invention has the advantages that: the portable tester is used for hermetically grinding a coal and shale sample in the experiment process and prevents the sample from being oxidized by air, an exhaust pipe is connected with a burette with scales through a rubber pipe, gas released after the coal or shale sample is ground into powder can be collected by the burette, and the gas content of coal and shale is quickly tested.

Description

technical field [0001] The invention relates to coalbed methane and shale gas gas content testing equipment, in particular to a portable rapid sample preparation and desorption device for coalbed methane and shale gas gas content testing. Background technique [0002] At present, coalbed methane and shale gas are a kind of natural gas in the state of adsorption, free or dissolution in coal seam or shale. In conventional natural gas reservoirs, it is generally free gas and dissolved gas, and there is basically no adsorbed gas, while in unconventional natural gas reservoirs such as coal seams and shale, the content of adsorbed gas is relatively high. The gas content is generally greater than 90%, and the adsorption and free gas adsorption gas content is directly related to the enrichment degree and development technology of natural gas, especially for coalbed methane, shale gas and other unconventional natural gas, the adsorption gas and free gas content Determination is a ke...

AI Technical Summary

Problems solved by technology

[0004] 1. There is currently a lack of portable and dedicated experimental boxes and experimental platforms for field experiments, and the stability is not good;

[0005] 2. Due to the natural desorption of the samples placed in the closed tank, the desorption experiment period is long, and the data cannot be provided to the production site personnel in time, which affects the evaluation of shale and coalbed methane;

[0006] 3. Because the hammer is needed to crush the coal rock and shale samples during the experiment, the processing is slow, resulting in the samples being exposed to the air for too long. In addition, the smashing effect of the hammer is poor, and many samples cannot reach industrial analysis. The degree of fine comminution required, resulting in sample waste

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