ISO 18875-2015 pdf free.Coalbed methane exploration and development – Terms and definitions. ISO 18875 provides term i tiology on geology and exploration, engineering construction. field development and production in coalbed methane industry. This International Standard does not coittain SLI riace gaL hering. 2 Terms relating to geology and exploration 2.1 coalbed methane CBM thanerich gas naturally occurring I1 coal seams (and surrounding rock) typically comprising of 110 % to 95 % methane with lower proportions of ethatic, propane, flit rogen •ifl(I carbon (IloXide Note I to entry: In common international use, this term refers to methane recovered from un—mined coal seams using surface boreholes. 2.2 adsorption cnriclinwnt of the absorptive gas at the external and accessible internal surfaces of a solid material (coal matrix) ISOLJRCF: ISO 15901-2:2006. 3.21 2.3 desorpt ion Opposite olacIsorptioii (22), in which adsorbed gases leave the surface ofa solid material (coal matrix) Note 1 to entry: The liberation can he spontaneous but can be accelerated by physical actions. lS011RCI: ISO 3529-1:19111. 1.13.21 2.4 gas content volume of gas per unit mass of coal, usually expressed in cubic meter of gas per ton of coal under standard temperature and pressure (SIP) conditions Note 1 to entry: Unit…