Coal bed methane gas ground treatment method

Abstract

The invention relates to a coal bed methane gas ground treatment method. The problems that coal bed methane gas treatment measures are deficient, and the horizontal well mining efficiency is low are solved. The coal bed methane gas ground treatment method comprises the following steps that the to-be-mined well field range is explored, and the layout routes of a main roadway, a coal mining workingface and roadways on the two sides of the coal mining working face in the mine mining process are preset; the well hole track of a horizontal well is set along the layout routes of the main roadway and the roadways on the two sides; the well hole track of a cluster type horizontal well is set in the coal mining working face between the roadways on the two sides; the horizontal well and the clustertype horizontal well are drilled according to the well hole track of the horizontal well and the well hole track of the cluster type horizontal well respectively, the well walls are reinforced with slurry when the well walls are not stable, and after the wells are formed, shock wave operation is conducted on the horizontal sections of the horizontal well and the horizontal sections of the clustertype horizontal well; and after shock wave operation of all the horizontal sections of the horizontal well and the cluster type horizontal well is completed, the horizontal well and the cluster typehorizontal well are put into drainage.

Description

technical field [0001] The invention belongs to the field of energy exploitation, and in particular relates to a ground treatment method for coal seam gas. Background technique [0002] my country is very rich in coal resources, with a coal reserve of more than 1 trillion tons. It is the world's largest coal producer and consumer. Coal bed methane in coal is a high-heat, clean and convenient new energy. In 2015, the "Dynamic Evaluation of Coalbed Methane Resources" organized by the Ministry of Land and Resources showed that the total resources of coalbed methane were about 30 trillion cubic meters, and the recoverable resources were about 12.5 trillion cubic meters, ranking third in the world's coalbed methane resources. Accounting for 11.2%-13.7% of global resource reserves. [0003] However, about one-third of the coal (production of about 1 billion tons or more) is produced in high-gas and high-gas outburst mines, and the gas (coal bed methane) disaster caused by coal is...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a ground control method for coal seam gas in view of poor coal seam gas control measures and the problems of collapsed holes or empty wells in horizontal wells, forming a method for controlling coal mine gas on the ground, and at the same time increasing the output of coal bed gas

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