Coalbed gas high pressure desorption instrument

Abstract

The invention relates to a coal bed gas high pressure desorption meter, while the prior coal bed gas high pressure constant temperature adsorption instruments utilizes coal powder samples to test coal bed gas constant temperature adsorption parameters, and the coal bed gas desorption test generally utilizes normal-pressure desorption instruments, to test the parameters of drilling well coal core, such as coal bed gas content and adsorption time and the like. The coal bed gas high pressure desorption meter comprises an automatic temperature control water bath apparatus, a stainless steel mechanical device, and an image and pressure data acquisition system, wherein the stainless steel mechanical device comprises a gas collection cylinder, a sample cylinder, a gas regulation cylinder, a frame, a high pressure pipeline and a valve, the cylinder is fixed on the frame, the frame and the cylinder are arranged in the automatic temperature control water bath device, and the frame is connected with a lifting machine. The invention can effectively simulate reservoir bed conditions and discharge-mining working systems, realize the switch between gas-solid two-phase system and gas-liquid-solid three-phase system under high pressure condition, the desorption, gas collection and measurement processes under high pressure water injection conditions, effectively observe the desorption of coal bed gas, and test the parameters such as desorption pressure, desorption quantity and lost gas quantity and the like.

Description

technical field [0001] The invention is a device of a high-pressure desorption instrument for coalbed methane, which can observe the desorption status of coalbed methane in real time under the condition of water injection under high pressure, and collect test data such as temperature and pressure; through data processing, desorption time, desorption pressure, desorption amount, and loss can be obtained. air volume and other parameters. Background technique [0002] Coalbed methane exists in coal seams, and the technical parameters of coalbed methane desorption must be measured before exploration, development and utilization. At present, the coalbed methane high-pressure isothermal adsorption instrument uses pulverized coal samples to test the coalbed methane isothermal adsorption parameters; the coalbed methane desorption test generally uses atmospheric pressure desorption equipment to measure the parameters such as coalbed methane content and adsorption time on the drilling...

AI Technical Summary

Problems solved by technology

However, the coalbed methane reservoir has a certain pressure and is considered to be saturated with groundwater. Some parameters such as desorption time, desorption pressure, and loss amount need to be measured under high pressure and water injection conditions. The current test equipment cannot meet the high pressure water injection test conditions, so it is necessary to Develop the device system of high-pressure desorption instrument for coalbed methane to meet the urgent requirements of scientific experimental research and actual production

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