Coal bed methane

CBM is a natural gas stored in and around coal seams, made up of approximately 90% methane and other gases such as carbon dioxide. During coal mining, the presence of methane is a major threat to work safety and the gas is released into the atmosphere. The CBM industry developed partly from a drive to reduce these emissions. Methane is recovered from the coal seams by drilling a series of vertical or horizontal wells directly into the seam, depending on geology, with water drawn first in order to reduce pressure.

Green Dragon Gas’ LiFaBriC proprietary methodology allows gas to be extracted from China’s heavily faulted anthracite coal seams. It naturally desorbs the coal, with no need for fracking, producing a high quality gas which can be used as a replacement for conventional natural gas in pipeline networks or for power generation.

The world’s largest CBM resource bases are in the former Soviet Union, Canada, China, Australia and the United States, but much of this resource based remains untapped. In China the CBM industry has been developing rapidly, with CBM production capacity reaching 88 BCF and production reaching 36 MMcf in 2009. 3,500 vertical wells had been drilled at CBM projects by the end of that year.