Shale gas content determining method and determining system of shale gas content determining method

Abstract

The invention relates to a shale gas content determining method and a determining system of the shale gas content determining method. The shale gas content determining method has the main characteristics that a computer is used as a processor and a whole determining process has no piezoresistance under the supporting of relative programs; a filtering and drying mechanism is connected with a methane component infrared gas sensor and a carbon dioxide component infrared gas sensor by pipelines; pipelines, which are output to a large-range mass flow meter and a small-range mass flow meter, of the carbon dioxide component infrared gas sensor are connected with solenoid valves; the outputs of the large-range mass flow meter and the small-range mass flow meter are connected with a gas outlet by pipelines; a pipeline, which is output to the gas outlet, of the carbon dioxide component infrared gas sensor is connected with a solenoid valve by a pipeline; acquisition mechanisms ADAM4017 receive standard analog signals output by the infrared gas sensors and the mass flow meters; and a control mechanism ADAM4068 is connected with coils of all the solenoid valves respectively. According to the shale gas content determining method and the determining system of the shale gas content determining method, the content of desorbed gas, the content of desorbed methane and the accumulated amount of the desorbed gas and the like can be calculated in real time, and the loss gas content, the gas content and the like are calculated by a loss gas calculation model which is established by corresponding standards. The content of shale gas can be accurately measured by accurately measuring the percentage contents of methane and carbon dioxide and removing the mixed air through software calculation.

Description

technical field [0001] The invention relates to a shale gas content measuring method and a measuring system, which is a method for measuring the gas content in the exploration of unconventional oil and gas resources such as shale gas mainly adsorbed gas. Through this method, the whole process of shale gas desorption process can be continuously measured, and key parameters such as desorbed gas content and desorbed methane content can be accurately calculated through the changes of main components such as carbon dioxide, methane, and hydrogen sulfide, providing an important basis for reserve calculation. . It belongs to the technical field of unconventional oil and gas experiments. Background technique [0002] As a new natural gas resource, shale gas is receiving more and more attention in China. Shale gas is mainly stored in the adsorbed state. After the pressure is released, the gas is gradually desorbed from the reservoir medium. Desorbed gas content is an important...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a shale gas content measurement method and measurement system to solve the problems of inaccurate desorption gas measurement and complicated operation under the existing experimental conditions. The present invention provides accurate desorption gas content data and simultaneously realizes Multi-point detection of desorption gas, obtain desorption time curve, calculate loss gas content on this basis, and improve work efficiency of desorption gas measurement

Images