PT Pertamina Hulu Energi Offshore North West Java | Medco E&P Natuna Ltd. Premier Oil Sea B.V. Kalimantan Timur Chevron Indonesia ExxonMobil Cepu Limited Kangean Energy Sumatera TL Sdn. Bhd. EP Pangkalan Susu Field Technip BW TSB Invest Timas Suplindo Star (Kakap) INPEX Masela Petronas Carigali (Karapan) PearlOil (Sebuku)