Bayu Undan / Darwin LNG

The Bayu-Undan gas and condensate fields are located within the Joint Petroleum Development Area, approximately 500 kilometres north-west of Darwin.


Santos (11.5%), ConocoPhillips (56.94% and operator), INPEX (11.38%), Eni (10.99%), Tokyo Timor Sea Resources (9.19%).


The Bayu field was discovered in 1995.

First Production

Condensate and LPG commenced production in April 2004. First LNG production commenced in February 2006, and is sold to Tokyo Electric and Tokyo Gas. 

About the Development

The Bayu-Undan field includes a non-crewed wellhead platform and a central production and processing complex, which contains a drilling production and processing platform and a compression, utilities and quarters platform. Thirteen wells have been drilled for production, gas injection and water disposal.

Once the gas is produced from the reservoir, condensate and LPG are stripped and piped to a floating storage and offloading vessel. The gas is then transported to the onshore LNG plant via a 26-inch, 500-kilometre subsea pipeline. Located at Wickham Point, the 3.7 million tonne per annum LNG plant uses ConocoPhillips’ optimised cascade LNG process technology with associated storage and marine load-out facilities. 

The phase 3 development program was delivered ahead of schedule in March 2015, which included a new subsea production well tied back to the existing platform facilities. 

In 2015, Santos’ share of production was 19.5 petajoules of gas (which was sold as LNG), 682,100 barrels of condensate and 37,500 tonnes of LPG.