U.S. surges past Saudis to become world's top oil supplier -PIRA

Oct 15 (Reuters) - The United States has overtaken Saudi Arabia to become the world's biggest oil producer as the jump in output from shale plays has led to the second biggest oil boom in history, according to leading U.S. energy consultancy PIRA. U.S. output, which includes natural gas liquids and biofuels, has swelled 3.2 million barrels per day (bpd) since 2009, the fastest expansion in production over a four-year period since a surge in Saudi Arabia's output from 1970-1974, PIRA said in a release on Tuesday.