Barrel (unit) continued to use the same size barrels. In the worldwide oil industry, an oil barrel is defined as 42 US gallons, which is about litres or 35 imperial gallons. Oil companies that are listed on American stock exchanges typically report their production in terms of volume and use the units of bbl, Mbbl (one thousand barrels), or MMbbl (one million barrels) and occasionally for widest comprehensive statistics the Gbbl (or sometimes Gbl) denoting a billion. There is a conflict concerning the units for oil barrels (see ). For all other physical quantities, according to the International System of Units, the
Oil reserves in Libya Oil reserves in Libya Oil reserves in Libya are the largest in Africa and among the ten largest globally with as of 2010. Oil production was as of 2010, giving Libya 77 years of reserves at current production rates if no new reserves were to be found. Libya is considered a highly attractive oil area due to its low cost of oil production (as low as $1 per barrel at some fields in 2002), low sulfur content, being classified as "sweet crude" and in its proximity to European markets. Libya's challenge is maintaining production at mature fields, while finding and