Natural gas, predominantly methane [CH4], generated during coal formation and adsorbed in coal. Natural gas adsorbs to the surfaces of matrix pores within the coal and natural fractures, or cleats, as reservoir pressure increases. Production of natural gas from coal requires decreasing the pore pressure below the coal’s desorption pressure so that [..]

Natural gas generated and trapped in coal seams.Coal Bed Methane (CBM) involves directly drilling into unworked coal and coal measures strata to release the methane locked within it rather than utilis [..]

Coalbed methane, coalbed gas, coal seam gas (CSG), or coal-mine methane (CMM) is a form of natural gas extracted from coal beds.

often referred to as CBM, is methane is stored within coal by a process called adsorption. The methane is in a near-liquid state, lining the inside of pores within the coal. To extract the gas, a stee [..]

Natural gas extracted from coal beds.

natural gas produced in a coal seam during the formation of the coal. Coal seams form the reservoir rocks and traps for the methane, which is usually of near pipeline quality.

Often referred to as CBM, is methane stored within coal by a process called adsorption. The methane is in a near-liquid state, lining the inside of pores within the coal. To extract the gas, a steel-encased hole is drilled into the coal seam reducing the pressure within the coal seam causing both gas and ‘produced water’ escape to the surface throu [..]

Like tight gas and shale gas, CBM is another source of unconventional natural gas. CBM is generated during coal formation and is then contained within the microstructure of a coal. Typically recovery of CBM entails pumping water out of the coal seam to allow the gas to escape.