U.S. cables from Saudi Arabia in 2007 were released by WikiLeaks . Former Aramco executive predicted a slow decline in Saudi oil output after 2020 . Comment: Saudi Arabia 's oil reserves may have been grossly overestimated and its capacity to continue pumping at current capacity exaggerated , according to a U.S. diplomatic cable sent from the kingdom in 2007 . 2009 cable cites analysts who say nuclear power is kingdom 's only recourse to meet demand .
U.S. cables from Saudi Arabia in 2007 were released by WikiLeaks . Former Aramco executive predicted a slow decline in Saudi oil output after 2020 . Comment: 2009 cable cites analysts who say nuclear power is kingdom 's only recourse to meet demand .