ONWJ Offshore Northwest Java PSC Oil And Gas Fields

Summary Information

  • Operator: Pertamina
  • Country: Indonesia
  • Location: offshore Java Island
  • Production start:
  • Partners: Inpex
  • Type: Oil & Gas
  • Estimated Reserves:
  • Production Volume:


  • The Offshore Northwest Java PSC (ONWJ) is located offshore Java Island covering 11,052 km2
  • Facilities include 314 producing wells and 218 offshore structures, of which eleven are permanently manned flow-stations for processing and compression, and 375 pipelines covering 1,250 kilometres in distance, as well as three onshore gas receiving facilities
  • Fields include Ardjuna Field, APN, Bravo, Kilo,


  • Emtunga: Ardjuna - 80 man single-lift quarters

APN Gas Field

  • Tecnip: Front End Engineering Design (FEED)
  • FoundOcean: APNA & APNB grouting


  • 2002 - CNOOC acquired a 36.72% interest from Repsol
  • 2005 - First gas produced from APN Gas Field
  • 2009 - Pertamina acquired 46% from BP and became operator
  • 2011 - Salamander sold its stake
  • 2011 - CNOOC sold its stake to EMP International



  1. FoundOcean Subsea References
  2. Emtunga Offshore Platform References
  3. CNOOC Limited Agrees to Buy Indonesian Assets of Repsol-YPF for US$585 Million
  4. Start of natural gas production from APN gas field in the Offshore Northwest Java Production Sharing Contract, Indonesia
  5. CNOOC Limited Sold Interest in Indonesian ONWJ PSC
  6. Sale Of Interests In Offshore Northwest Java And South East Sumatra PSCs
  7. BP to sell West Java interests to Pertamina

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