Oyong and Wortel fields, located in 45 metres of water offshore East Java, Indonesia.
Santos (45% and operator), Singapore Petroleum Sampang Ltd (40%), Cue Sampang Pty Ltd (15%).
Oil production commenced from Oyong in 2007, followed by gas production in 2009. All of the gas produced from the Oyong field is sold to PT Indonesia Power.
Wortel gas production commenced in February 2012
Gas from the offshore Oyong and Wortel fields is transported via a 60-kilometre pipeline to an onshore gas processing facility at Grati in East Java where it is sold for domestic power generation.
Oil from the Oyong field is piped to the Surya Putra Jaya FSO (floating storage and offloading) for storage and export.