The Dai Hung field is located in the Nam Con Son Basin, 270 kilometres southeast of the town of Vung Tau. The field was brought onstream in October 1994 by BHP, using a floating production unit (FPU) and floating storage and offloading unit (FSO). The original PSC partners gradually withdrew from the project due to disappointing production performance. Following an appraisal drilling campaign in 2003, Zarubezhneft, PetroVietnam's partner in the Dai Hung field from 1999, also elected to withdraw from the project. In November 2007, PetroVietnam created a 100%-owned subsidiary - PVEP Dai Hung - specifically to operate and re-develop the field, which had underperformed against initial expectations. In 2009, a new PSC with investment incentives was signed by PVEP Dai Hung to operate and launch a second phase of development on Dai Hung. The second phase of development has involved the installation of a new wellhead platform and a major drilling campaign on the southern part of the field.