Abstract: Based on the characteristics of the pressure declining, desorption, diffusion and fluid flow in the process of coalbed methane from matrix of coal seam. Applying the non-equilibrium desorption methods in the paper, we studied the singlephase flow of coalbed methane in coal matrix and cleat, and es-
tablished a new evaluation model for finite conductivity fractured well of coalbed methane. The paper described the effect of the factors of fracture face damage skin, adsorption, fracture storage, and interporosity flow on transient pressure performance. Finally, the characteristics of typical curves for coalbed methane and parameter estimation were discussed. It gets the
reliable supports for coalbed methane reservoir development.

Key words: coalbed methane, fractured well, finite conductivity, non-equilibrium adsorption model, transient pressure analysis