The ONWJ production sharing contracts in the Java Sea cover 8,300 square kilometers, from north of Cirebon in the east to Pulau Seribu in the west. In over 30 years of operations, ONWJ has produced over 1.4 bbo (billion barrels of oil) and 1 tcf (trillion cubic feet) of gas from the Arjuna, Arimbi and Bima fields. In 2005, average production was 68 mboed (thousand barrels of oil equivalent per day) making ONWJ one of Indonesia's leading hydrocarbon producers, as well as a major supplier of natural gas to Indonesia's domestic market.