Offshore North West Java Block

DISCOVER MUJ ONWJ

The operational area is located in the Offshore North West Java (ONWJ) Cooperation Contract area in West Java, which stretches from the Kepulauan Seribu (DKI Jakarta) to North Cirebon (West Java). Until now, the block of ONWJ is 8.300 km2.

Participating interest KKS ONWJ with a proportion of 90% owned by Pertamina Hulu Energi ONWJ and 10% owned by Migas Hulu Jabar ONWJ.

The oil production of the ONWJ Working Area (WK) in the first semester of 2024 ranked 5th compared to other Cooperation Contract Contractors (K3S) in Indonesia.

The market for crude oil is 100% dedicated to domestic needs, such as RU III Plaju, RU VI Cilacap, RU V Balikpapan, and RU VI Balongan. Meanwhile, natural gas is supplied to PT PLN (Persero), PT Pupuk Kujang, PT Pertamina (Persero) – RU VI Balongan, PT Pertamina (Persero) – BBG, and PT Pertagas Niaga.

The ONWJ Working Area was initially managed by Atlantic Richfield Indonesia Inc. However, in 2000, management was transferred to BP West Java Ltd. From 2009 until the end of the contract in 2017, and under a new contract starting in 2017, the ONWJ Working Area has been operated by PHE ONWJ. In January 2017, PHE ONWJ officially became the operator of WK ONWJ, partnering with MUJ ONWJ in February 2019.

The North West Java Offshore Working Area has:

  1. The ONWJ (Offshore North West Java) Working Area is located in the Java Sea, covering an area of 8,300 km², stretching from northern Cirebon to the Thousand Islands.
  2. It includes 10 Flow Stations and 220 Offshore Platforms.
  3. Subsea pipelines span 2,125 km, consisting of 426 pipelines.
  4. There are 3 onshore receiving facilities (Onshore Receiving Facilities) located in Muara Karang, Tanjung Priok, and Cilamaya, as well as 1 onshore processing facility in Balongan.
  5. The Arco Ardjuna floating storage and offloading (FSO) vessel, which had been in operation since 1972 and was over 50 years old, was recently replaced with a new facility named FSO Ardjuna Prima in September 2024.