Pumping an output of 1.42 million barrels of oil per day in 2008, Algeria is Africa's fourth largest crude oil producer and a member OPEC. The sixth largest natural gas producer in the world, Algeria produced more than 3 Tcf of natural gas in 2007. Major industry players operating in Algeria, including state-owned oil giant Sonatrach, are Anadarko -- the largest foreign oil producer in the region -- BG Group, BP, ConocoPhillips, Eni, Gazprom, Repsol, Shell, StatoilHydro and Total. Algeria contains more than 12 billion barrels of proven oil reserves and 159 Tcf of proven natural gas reserves.