THE PREDICTION OF COAL RESERVOIR PERMEABILITY IN TIEFA COALFIELD

The prediction of coal reservoir permeability is the necessary work for reservoir evaluation berore the development of coalbed methane.The adopted is based on the possibilities of finding the fracture developed zones and their strikes in the region and predicting the high-permeable areas by the macro-and micro-statistical analyses of the joints in enclosing rocks and the fractures in coals.