Chinese oil and gas firm CNOOC, together with six other production sharing contractors (PSC), began delivering gas to Indonesia's state electricity company PT PLN through an 85-kilometer submarine pipeline, a report said Thursday.

Indonesian subsidiary, CNOOC South East Sumatra (SES), will supply 50 billion British thermal units (BBTU) of gas per day to the 750-megawatt (MW) power plant in Cilegon, West Java, in the first year and is expected to deliver 80 BBTU per day afterwards, said The Jakarta Post.

The company's partners include Inpex Sumatra Ltd, KNOC Sumatra Ltd, Orchard Energy Sumatra BV, Fortuna Resources (Sunda) Ltd, Talisman UK (Southeast Sumatra) Ltd and Talisman Resources (Bahamas) Ltd, it said.