Coalbed methane (CBM) production is somewhat complicated and has led to numerous methods OF approximating production performance. Many CBM reservoirs go through a dewatering period before significant gas production occurs. The production process, with dewatering, adsorption of gas in the matrix and molecular diffusion within the matrix, can be difficult to model. Several authors have presented different approaches involving the complex features related to adsorption and diffusion to describe the production performance for coalbed methane wells. Various programs are now commercially available to model production performance for CBM wells, including reservoir simulation, semi-analytic and empirical approaches. Programs differ in their input data, description of the physical problem and calculation techniques. This paper presents comparative results of several available pro-rams using different test cases (vertical fractured wells and horizontal wells).