what is coal seam gas
Coal seam gas is simply natural gas sourced from coal deposits. Natural gas â or methane â is found in several different types of rocks, including coal seams, sandstones and shales.Coal seam gas is trapped in coal formations, typically 400-1000 metres underground, although it can be found at depths up to 1200 metres.oal seam gas is simply natural gas sourced from coal deposits. Natural gas â or methane â is found in several different types of rocks, including coal seams, sandstones and shales.