Device and method for continuously collecting shale desorption gas

Abstract

The invention discloses a device for continuously collecting shale desorption gas, which comprises a first gas collection device, a second gas collection device and a valve position switching device, wherein the first gas collection device and the second gas collection device are connected with the valve position switching device; the valve position switching device is connected with a water inlet device and a shale desorption device; the first gas collection device and the second gas collection device are alternately communicated with the water inlet device and the shale desorption device by valve position switching of the valve position switching device; the first gas collection device is communicated with the shale desorption device for water drainage and gas collection; the second gas collection device is communicated with the water inlet device for water inlet; and when the first gas collection device is full of shale gas collected in the first gas collection device, the valve position switching device performs the valve position switching, the second gas collection device is communicated with the shale desorption device for the water drainage and the gas collection, and the first gas collection device is communicated with the water inlet device for the water inlet. According to the device, a mode of reciprocating alternation of the two gas collection devices is designed based on a continuous measurement guide idea, and the continuity of a measurement process is ensured.

Description

technical field [0001] The invention relates to the field of shale reservoirs, in particular to a device and method for continuously collecting shale desorbed gas without interruption. Background technique [0002] Shale gas is an unconventional natural gas resource that exists in shale and is self-generated and stored. Gas content is a very important parameter to evaluate whether shale has industrial reserves. In order to effectively evaluate whether a certain area has the prospect of industrialization, accurate gas content evaluation data must be established, and these gas content data are used for reservoir evaluation, resource evaluation and production prediction. Therefore, in order to understand the gas content of shale, it is necessary to accurately test the gas content, and provide a method and device capable of accurately measuring the gas content of shale. [0003] At present, shale gas cannot be collected continuously and uninterruptedly during the collection pr...

AI Technical Summary

Problems solved by technology

[0003] At present, shale gas cannot be collected continuously and uninterruptedly during the collection process, and the shale gas lost during the intermittent collection process is often impossible to calculate, which leads to the inability to accurately predict the content of shale gas

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