Full-automatic test system and method for gas content of shale

Abstract

The invention discloses a full-automatic test system for gas content of shale. The full-automatic test system comprises a first gas collecting device, a second gas collecting device and a valve position switching device, wherein the first gas collecting device and the second gas collecting device are both connected with the valve position switching device; the valve position switching device is connected with a water feeding device and a shale desorbing device; the first gas collecting device and the second gas collecting device are alternately connected with the water feeding device and the shale desorbing device through the valve position switching of the valve position switching device, so that the continuous water draining and gas collection can be realized between the first gas collecting device and the second gas collecting device; the valve position switching of the valve position switching device is controlled by a controller; liquid level sensors are arranged in both of the first gas collecting device and the second gas collecting device; the liquid level sensors are used for acquiring the water level elevation and transmitting to the controller in the manner of measuring the pressure difference of the shale gas and water in the process of water draining and gas collection. The full-automatic test system for gas content of shale disclosed by the invention has stable and reliable performances, meets the design requirement, is high in accuracy, is high in reproducibility and high in degree of automation and has wide application prospect.

Description

technical field [0001] The invention relates to the field of shale reservoirs, in particular to a fully automatic shale gas content testing system and method. 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 shale gas content, it is necessary to accurately test the gas content. The accuracy and stability of the shale gas content testing equipment has become the core issue in the desorption test. Using the shale gas content testing equipment to accurately record includes The on-site experimental data o...

AI Technical Summary

Problems solved by technology

However, the above methods still have the following problems: some desorption gas measurement processes are of low automation and require manual intervention, and the detection data will be interrupted; some instruments and equipment are too large to be transported to the site for work; The influence of gas measurement results, the error is relatively large; some can not be measured by multiple groups at the same time, which greatly affects the efficiency of on-site testing, and will also have a certain impact on the loss of gas estimation

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