naturally occurring mixture of gases, both hydrocarbons and non-hydrocarbons, often associated with deposits of petroleum. For domestic and industrial use it can be stored or transported by pipeline, refrigeration, carriers or in drums, in liquefied or gas form., maakoore tühikuis ja poorseis kihtides sisalduv gaasisegu; on osaliselt lahustunud naftas ning pinna- ja põhjavees, adsorbeerunud kivimeil ja tahkekütustel