"The flow has been discovered in CNOOC's Bozhong 19-6 gas field, China Central Televison reported. It is the largest oil and gas discovery in the Bohai Bay Basin in the past 50 years, and could be used by millions of city dwellers for hundreds of years, reports the China Daily. According to Liu Baosheng, a project manager with the CNOOC, 11 wells have found oil and gas in the Bohai Sea, and a 12th well has reached 4,700 meters below the seabed.