Bayu Undan is a producing conventional gas field located in shallow water in Timor-Leste and is operated by Santos. The field is located in block TL-SO-T 19-13 and TL-SO-T 19-12, with water depth of 359 feet.

Field participation details

The field is owned by Santos, SK, Eni, Inpex, Tokyo Gas, Chubu Electric Power and Tokyo Electric Power Co Holdings.

Production from Bayu Undan

The Bayu Undan conventional gas field recovered 93.85% of its total recoverable reserves, with peak production in 2008. The peak production was approximately 64.99 thousand bpd of crude oil and condensate, 37.47 thousand bpd of natural gas liquids and 500 Mmcfd of liquid natural gas. Based on economic assumptions, production will continue until the field reaches its economic limit in 2025. The field currently accounts for approximately 100% of the country’s daily output.

Remaining recoverable reserves

The field is expected to recover 56.46 Mmboe, comprised of 3.34 Mmbbl of crude oil & condensate, 300.09 bcf of liquid natural gas reserves and 3.1 Mmbbl of natural gas liquid reserves. Bayu Undan conventional gas field reserves accounts 0.02% of total remaining reserves of producing conventional gas fields globally.

About Santos

Santos Ltd (Santos) is an oil and natural gas company. Its activities include onshore, offshore, and liquefied natural gas (LNG) projects. The company has exploration and production acreage in Australia. Its operations are concentrated on core asset hubs such as Cooper Basin, Queensland and New South Wales, Papua New Guinea, Northern Australia and Timor-Leste, and Western Australia. Santos owns the related infrastructure and carries out transportation and marketing of hydrocarbons. Its products include natural gas, ethane, condensate, methane, coal seam gas, liquefied natural gas (LNG) and crude oil. The company supplies its products to homes, businesses, and major industries across Australia and Asia. Santos is headquartered in Adelaide, South Australia, Australia.


Information on the field is sourced from GlobalData’s fields database that provides detailed information on all producing, announced and planned oil and gas fields globally. Not all companies mentioned in the article may be currently existing due to their merger or acquisition or business closure.