typical coalbed methane wells produce water because the coal is saturated with water   the water is produced to allow a pressure decline in the coal and allow desorption of the gas from the coal  if a coal well is shut in the desorption will stop and water will need to be produced so that desorption can again take place   so no it is not practical to shut in a coal bed methane well
Thanks elwoodelmore, thats what I figured. I'm guessing  that the shale gas wells will also have problems if any of the frac water is left in the reservoir. It will be a real problem for producers because the pipelines don't generally allow a producer to decide which wells to shut in, its based on market conditions.