Shale Oil

European Commission - Eurostat International Energy Agency (IEA) Oil shale production and direct use should be covered under coal. The production of shale oil (secondary product) is covered under oil. United Nations Economic Commission for Europe (UNECE) Oil shale production and direct use should be covered under coal. The production of shale oil (secondary product) is covered under oil. UNSD Energy Statistics Section A sedimentary rock containing a high proportion of organic matter (kerogen), which can be converted to crude oil or gas by heating.