Whole-journey gas-proof gas content measuring instrument and method for using the same to measure residual gas of rock sample

Abstract

The invention discloses a whole-journey gas-proof gas content measuring instrument and a method for using the same to measure residual gas of a rock sample. The measuring instrument comprises a sample smashing system, a heating system and a gas gathering and metering system, wherein the sample smashing system comprises a sample smashing tank capable of being closed, and a gas outlet is formed in the sample smashing tank; the heating system is used for heating the sample smashing tank; the gas gathering and metering system comprises a gas gathering and metering barrel used for gathering and metering the gas separated from the sample smashing tank, and the gas gathering and metering barrel is hermetically connected with the gas outlet of the sample smashing tank. The whole-journey gas-proof gas content measuring instrument uses the multi-functional integrated design, the operation is flexible, the use is facilitated, the gas-proof effect is good, the gas measuring error can be reduced, and the measuring accuracy and precision are improved; when measuring the residual gas of the rock sample, the whole-journey gas-proof gas content measuring instrument is capable of precisely and quickly measuring the residual gas content in shale, coal bed, tight sandstone and the like reservoirs, a sample tank does not need change in the whole journey of experiment, and the gas tightness is rigid; the gas measuring error is small, and the measuring precision is high.

Description

technical field [0001] The invention relates to the technical field of gas desorption experiments, in particular to a full-process airtight gas content measuring instrument and a method for measuring residual gas in rock samples using the same. Background technique [0002] Remaining gas is an important component of the total gas content of shale, coal seam, tight sandstone and other reservoirs, and its accurate and rapid measurement is of great value and significance. In terms of toxic and harmful gas measurement, the whole process of airtightness is an indispensable means. In a clean and green laboratory environment, dust-free treatment is even more important. [0003] At present, the measurement of airtight gas content in the whole process is mainly carried out by a step-by-step method, that is, in the process of gas content measurement, the airtight pulverization process and the post-processing gas collection process are implemented as two independent steps. In the two-...

AI Technical Summary

Problems solved by technology

[0012] An object of the present invention is to provide a full-process airtight gas content measuring instrument, which has a good airtight effect, can avoid the sample tank replacement step, reduces gas measurement errors, and improves the accuracy and precision of gas measurement, thereby overcoming the existing The airtightness of the gas content experiment process is insufficient, and the determination of the remaining gas content is often carried out step by step, and the measurement error is large and the measurement accuracy is low.

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