Characterization of Different Metamorphic-deformed Coals and Its Restriction on Coalbed Methane Accumulation and Flow

Coal is the reservoir for coalbed methane accumulation,its metamorphism and deformation are closely related to coalbed methane occurrence,migration and development. Based on the field data analysis,microscopic observation,porosity-permeability testing and mercury porosimeter analysis,the property characteristics of different metamorphic and deformed coals from typical coal-bearing coalfields are disscussed,explore the coal reservoir features and...