Forbes | Exxon Might Have Just Made The Largest Oil Find In Two Years OilPrice.com The Liza field could turn out to be the largest oil discovery reported in two years and the companies say that it could cost $18 billion to develop. Exxon describes it as a “world-class discovery with a recoverable resource of between 800 million and 1 ... With Second Big Oil Discovery, Exxon Puts Guyana On The Map Exxon And Hess Find Billion-Barrel Oil Deposit Off S. American Coast Exxon, Hess make big oil discovery off Guyana coast |