A coalbed methane well parameter monitoring system and method in a coal mining area

Abstract

The invention relates to monitoring systems and methods, in particular to a coal mine mining area coal-bed gas well parameter monitoring system and method, and belongs to the technical field of coal mine gas extraction. The coal mine mining area coal-bed gas well parameter monitoring system comprises a downhole monitoring subsystem and a ground monitoring subsystem. The downhole monitoring subsystem comprises a cable and a downhole pressure gauge. The ground monitoring subsystem comprises a wellhead pressure transmitter, a gas concentration monitor, a gas flowmeter and a main controller. Accordingly, the coal mine mining area coal-bed gas well parameter monitoring system and method have the following advantages that the parameter data of a single extraction well can be more accurately acquired; the relation between the extraction well and the extraction progress of a downhole working face of the extraction well can be dynamically monitored in real time, so that the change law of the well gas extraction parameters of a mining area is completely mastered, and true information is provided for the management of coal mining and gas extraction in a coal mine; basic data can be provided for the productivity forecast technology of a cold-bed gas extraction well in a coal mine area.

Description

technical field [0001] The invention relates to a monitoring system and method, belonging to the technical field of coal mine gas drainage, and in particular to a monitoring system and method for coalbed gas well parameters in a coal mine mining area. Background technique [0002] At present, coalbed methane wells in mining areas have become one of the main methods of gas drainage in coal mining areas in my country. [0003] In the existing technology, the parameters of the drainage wells in the mining area are mainly obtained through the centralized management mode of the surface drainage pumping station, that is, a gas gathering station is built at the end of the main pipeline of gas drainage, and the gas in the main pipeline is centrally processed However, the parameter data of a single drainage well cannot be obtained relatively accurately, and the change of the drainage parameters of a single well cannot be well reflected. [0004] In addition, due to technical and cos...

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Problems solved by technology

[0005] The present invention mainly solves the technical problems existing in the prior art such as inaccurate and incomplete acquisition of parameter data of a single drainage well and difficulty in obtaining the change law of gas drainage parameters in a well in a mining area, and provides a coal mine mining area Coalbed methane well parameter monitoring system and method, using the system and method, not only can obtain the parameter data of a single drainage well more accurately, but also can dynamically monitor the relationship between the recovery progress of the drainage well and the underground working face in real time, so as to be able to completely Grasp the change law of gas drainage parameters in mining areas, provide real information for the management of coal mining and gas drainage in coal mines, and provide basic data for the production capacity prediction technology of coalbed methane drainage wells in coal mining areas

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