Rock gas content measurement device and method for measuring rock gas content by utilization of device

Abstract

The invention discloses a rock gas content measurement device and a method for measuring a rock gas content by utilization of the device. The measurement device comprises a gas conveying pipe, and a volume metering unit. The volume metering unit comprises an enclosed pipe body filled with a liquid and a container communicated with the lower end part of the enclosed pipe body. The upper end part of the enclosed pipe body is communicated with a gas inlet pipe section in order to supply gases into the enclosed pipe body. The measurement device also comprises a power assembly for driving the containing to move up and down according to the gas pressure in the enclosed pipe body. After gases are filled into the enclosed pipe body, the power assembly drives the container to move up and down to ensure that the liquid level in the container and the liquid level in the enclosed pipe body are located in the same horizontal plane and the gas volume in the enclosed pipe body is obtained. The device can measure the gas volume directly without consideration of gas components, automatic operation is achieved and workload of measurement personnel is reduced.

Description

technical field [0001] The invention relates to the field of petroleum exploration, in particular to a rock gas content measuring device, and also relates to a method for measuring rock gas content using the device. Background technique [0002] Shale gas and coalbed methane are natural gas that occurs in shale or coal rocks. In unconventional oil and gas exploration such as shale or coal seams, the content of shale gas and coalbed methane is directly related to the development prospects of shale gas and coalbed methane. It is necessary to effectively evaluate whether shale gas or coalbed methane has commercialization prospects in a certain area , it is necessary to establish accurate gas content data, which are used for gas reservoir simulation and production prediction. For this, the gas content and desorption properties of the shale core or coal core must be known. Therefore, shale gas / coalbed methane gas content testing equipment is very important for the exploration a...

AI Technical Summary

Problems solved by technology

The use of the first type of measuring device will be affected by the composition of the gas to be measured, and there will be deviations, especially the water vapor in the gas will cause a large deviation in the measured value

For the on-site desorption gas measurement of shale, its composition will also change with the passage of desorption time, and the core will inevitably contain a certain amount of water when it comes out of the barrel, so it will directly affect the measurement results

When using the second type of method, it is necessary to manually read the data when reading, which will inevitably bring a lot of manual errors

In addition, usually when testing shale gas content, multiple samples are taken, which will bring a lot of workload

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