Applicability evaluation of logging method for recognition of coal body structure in medium and high rank coal seams

Coal structure has an important influence on permeability of coal reservoirs, and permeability is a core parameter in coalbed methane exploration and development. Logging method has been applied in coal body structure identification in a large number of coalbed methane blocks, but it is still in the exploratory stage. This paper systematically collects the logging parameter combinations used by the predecessors in the identification of coal structure in different coalbed methane blocks and the logging parameters for different coal structures. The blocks are divided into medium rank coal blocks (0.65%