soulsauce - it's methane gas that they are after. The methane should release under reduction in pressure to let the gas separate from the coal and flow. I haven't got it to hand, but a similar geological structure in Australia had over 800bcf gas (Myreene field possibly). The structure was known by the Australian geologist who carried out the report on Glantal. If gas flows, they estiimate that the flow rates should be high (compared to other CBM fields) at circa 5mmcfd.
Pannonian who are doing the drilling where bought out by USA CBM specialists Galaxy Energy corp. Makes you wonder when the only cbm potential Pannonian had are Germany and Hungary.