Block 12W permit, Nam Con Son Basin.
Santos (31.875%), Premier Oil (53.125% and operator), PetroVietnam (15%).
The Chim Sáo & Dua oil fields were both discovered in 2006.
Oil production from Chim Sáo commenced in October 2011 and gas production in 2012. Oil production from Dua commenced in July 2014.
The Chim Sáo project includes a single wellhead platform and a floating, processing, storage and offloading (FPSO) vessel. Dua was developed as a three-well subsea tie-back to the existing Chim Sáo facilities. Hydrocarbon processing takes place on the Lewek Emas FPSO with the oil exported on crude offtake tankers and the gas by subsea pipeline into existing gas infrastructure. The gas will be used for power generation to meet domestic demand.