STUDY ON THE CHARACTERISTICS OF COALBED METHANE COMPOSITION AND MAIN GEOLOGICAL CONTROLLING FACTORS IN FUXIN BASIN

The physical properties of coal reservoirs are important for the development of coalbed methane. Only by understanding the physical properties of coal can we understand the occurrence characteristics of coalbed methane. The paper is based on the analysis of coalbed methane components, reservoir physical properties and geological characteristics. Research on the characteristics of coalbed methane in Fuxin Basin. The results show that coal is a porous organic and inorganic mixture, and mainly organic matter. As a reservoir of coalbed methane, coalbed methane is mainly due to the existence of a large amount of pore space in the coalbed, which constitutes the place where coalbed methane is adsorbed and freed, and the coalbed methane is mainly stored in the internal surface area of coal pores in an adsorbed state. In the natural state, coalbed methane diffuses and migrates along the coal seam from deep to shallow, from high pressure to low pressure. and from high concentration to low concentration. The CBM in the Fuxin Basin is mainly affected by the characteristics of geological structure, magmatic rock, coal-grade gas and hydrogeology, and multiple factors comprehensively control the preservation characteristics of the CBM in the Fuxin Basin.