Study On Coalbed Methane Resource Evaluation And Exploitation Pattern Of Fuxin Mining Area

Coal-bed methane is a newly emerged clean energy resource in recent 20 years. The coalbed methane resource in China ranks the third in the world, with 35 trillion cubic meters. Because the coalbed methane resource of China presents the features like low pressure, low permeability, low saturation and high adsorbability, the exploitation of coalbed methane is always very difficult. Therefore, how to carry out the coalbed methane resource evaluation, study the recovery method and regular pattern and enhance the reclamation and recovery are always the critical problems of the coalbed methane exploitation of China.This article takes the geologic information of the old coalfield and coalbed methane and the productive materials of the coalbed methane mine as the foundation, combined the new documents of the mine and the geologic information of the coalbed methane in the neighboring zone, generally analyzes the macroscopic and microscopic features of the high-gas mine coalbed of Fuxin as well as the regularities of distribution of it, carries out the studies for the controlling factors of the coalbed methane becoming and the enrichment mechanism, finishes the analysis of the gas bearing property of the coalbed in Fuxin mining area, as well as does the prediction studies for the stock size of the the coalbed methane in three main mining zones. Aiming to the unexploited zones in Wulong mine (including Liu zone), Xingfu mine and Hengda mine, this thesis gives the optimistic method for the well site deployment. Until now 32 mines have been drilled and 26 mines have been opened, which realizes the scale exploitation of the coalbed methane in the unexploited zones. According to the coal exploitation regulation, the experience of the down hole laneway pump drainage and experience of co-exploitation of coal and coalbed methane in other zones, this thesis puts forward the technical plan for the blending coalbed gas in the mining area and the gob area by the surface drilling method, and forms the drilling well-completion technology and exploitation technology for the exploitation of the coalbed methane in the "unworked area", "mining area" and "gob area". By applying the active data and static data of the production of Fuxin coalbed methane well, this thesis systematically analyzes the principal factors that affect the gas production rate of the coalbed methane mine, studies the stimulation measurement for coalbed methane, and summarizes the exploitation ways and means for coalbed methane mine. And according to the coalbed methane exploitation and practice in Liujia area, studies the exploitation and regulation of the coalbed methane and makes relevant analytical prediction for the capacity, recovery factor and service life of the coalbed methane.