Novel shale gas on-site desorption testing device and testing method for atmospheric pressure stratum

Abstract

The invention discloses a novel shale gas on-site desorption testing device and a testing method for an atmospheric pressure stratum and relates to the technical field of measurement. The testing device is characterized in that a liquid level sensor (12) and an electric heater (13) are fixedly mounted at the bottom in a desorption tank (3) through screws; a filter screen bracket (7) is placed in the middle of the bottom in the desorption tank (3); a filter screen (6) is placed above the filter screen bracket (7); a desorption tank pressure cap (2) is mounted above the desorption tank in a threaded connection manner; an oil draining hole (1) and a pressure sensor (8) are formed in and mounted on the desorption tank pressure cap (2); an oil inlet hole (10) is formed at the bottom of the sideface of the desorption tank (3); and a three-way valve (11) is mounted outside the oil inlet hole (10). The device is simple in structure and ingenious in design, solves the problem of difficult testing of a gas content of a core of the atmospheric pressure stratum, and has important significance on shale gas resource evaluation of the atmospheric pressure stratum.

Description

technical field [0001] The invention relates to the technical field of metering and measurement, in particular to a novel shale gas on-site desorption test device and test method for normal-pressure formations. Background technique [0002] In the past two decades, the development of shale gas in the United States has achieved great success, which has completed the energy revolution and changed the world's energy pattern. The total amount of shale gas resources in China is 134 trillion cubic meters, ranking first in the world. With the exploration and development of Sinopec in Jiaoshiba, Fuling, Chongqing and CNPC in Longmaxi Formation shale gas exploration and development in Changning and Weiyuan, Sichuan, the development and utilization of shale gas in my country ranks second in the world. [0003] At present, the international general evaluation of shale gas resources mainly includes preservation conditions (geological structure characteristics), shale gas content, high-...

AI Technical Summary

Problems solved by technology

Shale cores contain shale components, cores swell with water, and solid particles are clogged, which prevents methane gas from being effectively transported out of the cores, resulting in inaccurate data from on-site desorption experiments of cores, which cannot objectively reflect the true gas content of shale The original on-site desorption test device cannot effectively solve the interference of the air in the desorption tank on the core desorption gas components, resulting in relatively large test data errors

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