2005 Penyesuaian Penawaran Saham Perdana IPO Saham

PT PERTAMINA PERSERO DAN ANAK PERUSAHAAN INFORMASI TAMBAHAN Tahun Yang Berakhir Pada Tanggal-tanggal 31 Desember 2007 dan 2006 TIDAK DIAUDIT PT PERTAMINA PERSERO AND SUBSIDIARIES SUPPLEMENTAL INFORMATION Years Ended December 31, 2007 and 2006 UNAUDITED ESTIMASI CADANGAN MINYAK DAN GAS TIDAK DIAUDIT lanjutan ESTIMATED CRUDE OIL AND NATURAL GAS RESERVES UNAUDITED continued Wilayah kerjaWorking area Saldo akhir 31 Desember 2005Ending balance December

31, 2005 Penyesuaian

Adjustments Produksi Production Saldo akhir 31 Desember 2006Ending balance December 31, 2006 Penyesuaian Adjustments Produksi Production Saldo akhir 31 Desember 2007Ending balance December 31, 2007 JOB-PSC : 50 ; PPI 50 - Minyak dan kondensatOil and condensate MBBls 96.089 59.113 10.390 144.812 11.665 11.863 144.614 - GasNatural gas MBOE 554.729 2.247 6.750 545.732 114.121 5.656 654.197 I P 10 - Minyak dan kondensatOil and condensate MBBls 390.600 221.011 20.355 149.234 25.947 19.460 155.721 - GasNatural gas MBOE 823.566 362.518 59.995 1.126.089 135.665 58.571 1.203.183 Badan Operasi Bersama BOB - Minyak dan kondensatOil and condensate MBBls 117.928 9.540 9.400 118.068 5.574 8.614 115.028 Cepu - Minyak dan kondensatOil and condensate MBOE - 216.515 - 216.515 - - 216.515 Jumlah minyak dan kondensatTotal oil and condensate MBBls 1.625.014 72.854 77.174 1.474.986 238.219 81.247 1.631.958 Jumlah gasTotal natural gas MBOE 2.533.324 646.467 132.324 3.047.467 380.101 127.896 3.299.672 Estimasi volume cadangan dan produksi gas dikonversikan dari MMSCF Millions of Standard Cubic Feet ke MBOE Thousands of Barrels of Oil Equivalent dengan menggunakan rate: 1 MMSCF = 0,1726 MBOE. The estimated gas reserves balances and production are converted from MMSCF Millions of Standard Cubic Feet to MBOE Thousands of Barrels of Oil Equivalent applying the following conversion rate: 1 MMSCF = 0.1726 MBOE. Penyesuaian pada cadangan merupakan penilaian kembali atas beberapa struktur pada awal tahun, berdasarkan hasil penilaian cadangan oleh Lembaga Minyak dan Gas Lemigas, Lembaga Afiliasi Penelitian dan Industri Institute Teknologi Bandung LAPI-ITB selaku lembaga resmi yang ditunjuk PT Pertamina EP dan disetujui BPMIGAS, serta penilaian kembali atas cadangan yang dibuat oleh PT Pertamina EP. Adjustments to reserves involve reassessment of reserves in certain structures at the beginning of the year, based on reserves certifications issued by the Oil and Gas Research Body Lemigas, the Foundation for Research and Industrial Affiliation, Bandung Institute of Technology LAPI-ITB as the official reserves certifiers appointed by PT Pertamina EP with the approval of BPMIGAS, and assessments of reserves prepared by PT Pertamina EP.