East Java Basin

Map of Sampang PSC Indonesia


Sampang PSC
Status Production and Exploration
Location East Java Basin, Indonesia
Working Interest 15%
Operator Medco Energi
Permit Description and Activity
The Sampang PSC is located in the Madura Straight offshore Madura Island in East Java, Indonesia. It is composed of two producing fields: Oyong and Wortel gas fields and a gas discovery at Paus Biru, where development planning is underway.
The Jeruk oil discovery is still to be developed.
Oyong Field
Oil production from the Oyong field commenced in 2007, followed by gas production in 2009. Gas produced from Oyong is transported via a 60 km pipeline to the Grati Onshore Gas Facility and sold to PT Indonesia.
Oil production was ceased in 20 and the field continues to produce gas.
Wortel Field
Following production from Oyong, Wortel gas production commenced in 2012, and is transported through a 7 km pipeline to the Oyong platform where it is sent through the 60 km pipeline to the onshore facilities. 
Paus Biru
The Paus Biru gas field was discovered in December 2018 by the Paus Biru-1 exploration well.
A flow test of the well produced 13.8 MMscfd through a 120/64” choke for 55 minutes.
A Plan of Development with commercialisation through the existing Oyong facilities is now being prepared for submission to the Indonesian regulator for approval. 
Jeruk prospect

The Sampang PSC Joint Venture continues to investigate the potential for development of the Jeruk oilfield which is technically challenging due to high formation pressures, fractured reservoirs and impurities in the hydrocarbons. The main technical issues to be resolved are the range of uncertainty in the size of the accumulation and the connectivity of the fracture network which will control the quantity of oil which may be recovered by each well and the flow rates that can be achieved. Work is currently being carried out by the Operator on possible development scenarios that can maximize the amount of reservoir information obtained from early production.