Novel shale gas content tester and shale gas content detecting method

Abstract

The invention relates to a novel shale gas content tester and a shale gas content detecting method. The novel shale gas content tester comprises a device, a real-time testing system, a system and a computer collecting and processing system, wherein the device is used for desorbing a sample at a constant temperature; the real-time testing system is used for testing pressure and temperature of the sample in the desorbing process; the system is used for detecting the volume of a sample desorbing space; through a pipeline, the device for desorbing the sample at the constant temperature is connected with the real-time testing system for testing the pressure and the temperature of the sample in the desorbing process; through a pipeline, the real-time testing system for testing the pressure and the temperature of the sample in the desorbing process is connected with the system for detecting the volume of the sample desorbing space; and the real-time testing system for testing the pressure and the temperature of the sample in the desorbing process and the system for detecting the volume of the sample desorbing space are connected with the computer collecting and processing system through data wires. According to the invention, the sample is placed in the constant temperature desorbing and detecting system to detect desorption, the problem that the measurement of desorbed gas is affected because the gas of a free space can be changed with temperature and pressure conditions of a testing environment is solved.

Description

technical field [0001] The invention relates to the field of measurement technology, and belongs to a test device for the content of adsorbed gas in mineral rocks such as shale gas and coalbed methane. A new shale gas content tester and a shale gas content measuring method for its gas content. Background technique [0002] Adsorbed natural gas generally exists in various mineral rocks. For shale and coal seams, the proportion of adsorbed gas in rocks can reach 20%-80%, and the proportion of adsorbed gas in coal seams is even higher, reaching more than 90%. The gas content in mineral rocks is directly related to the development prospects of shale gas and coalbed methane. To effectively evaluate the resources of shale gas and coalbed methane reservoirs, gas content is an essential parameter, which is related to reservoir pressure and Combined use of adsorption isotherms, gas production capacity can be predicted to determine the distribution of wells and production methods. ...

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Problems solved by technology

[0008] The invention provides a new shale gas content tester and a shale gas content measurement method to solve the problem in the prior art that when the sample gas content is low, the error of the direct measuring cylinder measurement method or the flow sensor measurement is large, so as to realize the measurement of the shale gas content. High-precision measurement of air content

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