Shale gas gas content tester and its test method

Abstract

The invention relates to the technical field of exploration and measurement, and in particular provides a shale gas gas content tester and a test method thereof. The sealing tank of the present invention is arranged on the weight sensor, and the analysis device is connected with the air inlet of the sealing tank through the first metal pipeline, and the first electromagnetic valve is connected in series on the first metal pipeline, and the drain port of the sealing tank is connected with the salt water outlet through the second metal pipeline. The water tank is connected, one end of the second metal pipeline connected to the sealed tank extends into the bottom of the sealed tank, and the other end of the second metal pipeline extends into the bottom of the brine tank; the exhaust device includes a positive displacement pump, and the exhaust port of the sealed tank passes through the third metal pipeline and the volume The air inlet of the pump is connected, the second solenoid valve is connected in series on the third metal pipeline, the air outlet of the displacement pump is connected to the fourth metal pipeline, the third solenoid valve is connected in series on the fourth metal pipeline, the first solenoid valve, the second solenoid valve, The third electromagnetic valve and the weight sensor are respectively connected with the acquisition and control system through wires. The invention has the advantages of simple structure, low cost, high testing precision and high degree of automation.

Description

technical field [0001] The invention relates to the technical field of exploration and measurement, in particular to a shale gas gas content tester and a test method thereof. Background technique [0002] According to the research results of "National Shale Gas Resource Potential Investigation and Evaluation and Selection of Favorable Areas" released by the Ministry of Land and Resources in 2012, the potential of my country's land shale gas geological resources is 134.42 trillion yuan, and the recoverable resource potential is 25.08 trillion yuan. The development potential of shale gas is huge, but the development of this field in my country is still in its infancy, especially the equipment for measuring and evaluating shale gas content is far from meeting the current needs. [0003] Shale gas content is a key parameter to evaluate the original gas volume of shale, and it is of great significance to the evaluation of shale gas content and the prediction of resource reserves....

AI Technical Summary

Problems solved by technology

If the desorption data is automatically obtained by a gas flowmeter, the measurement error of the gas flow rate is large when the desorption rate is low, and the volume of the fluid is easily affected by the ambient temperature and pressure, and the measurement accuracy is insufficient; direct measurement with the drainage of the gas collecting cylinder For gas volume, the measurement precision is insufficient, the influence of human factors is large, the operation is inconvenient and the efficiency is low; most of the existing drainage methods cannot realize continuous real-time measurement, the human error is more obvious during the operation process, and the measurement accuracy is low

However, some foreign air content testers with high precision have high automation and good stability, but most of them are expensive.

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