Anadarko on Friday began producing oil at the Lucius field, located about 230 miles offshore in the Gulf of Mexico. Via FuelFix, it is one of the biggest offshore oil startups expected in the U.S. this year. The Lucius field contains 300 million barrels of oil equivalent in 7,200 feet of water. It is one of five projects expected to boost Gulf oil production by 18% annually over the next two years.