Estimates and assumptions continued i

PT PERTAMINA PERSERO DAN ENTITAS ANAKNYA CATATAN ATAS LAPORAN KEUANGAN KONSOLIDASIAN Tanggal 31 Desember 2015 dan untuk Tahun yang Berakhir pada Tanggal Tersebut Dinyatakan dalam ribuan Dolar Amerika Serikat, kecuali dinyatakan lain PT PERTAMINA PERSERO AND ITS SUBSIDIARIES NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS As of December 31, 2015 and for the Year Then Ended Expressed in thousands of US Dollars, unless otherwise stated 75

4. AKUISISI DAN PENAMBAHAN PARTICIPATING INTEREST lanjutan

4. ACQUISITION AND

ADDITION OF PARTICIPATING INTEREST continued c. Perolehan participating interest di Blok Kampar c. Acquisition of participating interest in Kampar Block Pada tanggal 23 Desember 2014, Grup telah ditunjuk oleh Kementrian ESDM menjadi pengelola Blok Kampar. On December 23, 2014, the Group has been appointed by Ministry of Energy and Mineral Resources as the operator of the Kampar Block. Pada tanggal 2 November 2015, PT Pertamina Hulu Energi Kampar dan SKK Migas telah menandatangani kontrak kerjasama pengelolaan Blok Kampar yang berlaku efektif tanggal 1 Januari 2016 dengan jangka waktu kontrak selama 20 tahun terhitung sejak tanggal efektif. On November 2, 2015, PT Pertamina Hulu Energi Kampar and SKK Migas signed the PSC Kampar Block effective since January 1, 2016 for period of 20 years starting from effective date. d. Akuisisi participating interest di Blok NSO d. Acquisition of participating interest in NSO Block Efektif sejak tanggal 30 September 2015, PT PHE NSO telah mengakuisisi 100 participating interest dan mengambil alih pengelolaan Mobil Exploration Indonesia Inc. MEII di KKS Blok NSO dengan adjusted price consideration sebesar US10.657. Nilai tersebut adalah harga yang harus dibayar oleh MEII kepada PHE NSO berdasarkan Perjanjian Jual Beli. Saat ini PHE NSO dan MEII sedang melakukan rekonsiliasi untuk menghitung final price adjustment. Effective since September 30, 2015, PT PHE NSO acquired 100 participating interest and take over operatorship of Mobil Exploration Indonesia Inc. MEII in NSO Block PSC with adjusted price consideration of US10,657. This value is the price that must be paid by MEII to PT PHE NSO based on Asset Sale and Purchase Agreement. Currently, PHE NSO and MEII are reconciling to calculate the final price adjustment. e. Akuisisi participating interest di Blok B e. Acquisition of participating interest in B Block Efektif sejak tanggal 30 September 2015, PT PHE NSB telah mengakuisisi 100 participating interest dan mengambil alih pengelolaan ExxonMobil Oil Indonesia EMOI di KKS Blok B dengan adjusted price consideration sebesar US20.587. Nilai tersebut adalah harga yang harus dibayar oleh EMOI kepada PHE NSB berdasarkan Perjanjian Jual Beli. Saat ini PHE NSB dan EMOI sedang melakukan rekonsiliasi untuk menghitung final price adjustment. Effective since September 30, 2015, PT PHE NSB acquired 100 participating interest and took over operatorship of ExxonMobil Oil Indonesia EMOI in NSB Block PSC with adjusted price consideration of US20,587. This value is the price that must be paid by EMOI to PT PHE NSB based on Asset Sale and Purchase Agreement. Currently, PHE NSB and EMOI are reconciling to calculate the final price adjustment.

f. Akuisisi 30 saham PT Arun NGL

f. Acquisition of 30 share of PT Arun NGL

Efektif sejak tanggal 30 September 2015, PT PHE Arun mengakuisisi 30 saham PT Arun Natural Gas Liquefaction NGL dari Mobil LNG Indonesia Inc. seharga US60. Effective since September 30, 2015, PT PHE Arun acquired 30 share of PT Arun Natural Gas Liquefaction NGL from Mobil LNG Indonesia Inc. at cost US60. PT PERTAMINA PERSERO DAN ENTITAS ANAKNYA CATATAN ATAS LAPORAN KEUANGAN KONSOLIDASIAN Tanggal 31 Desember 2015 dan untuk Tahun yang Berakhir pada Tanggal Tersebut Dinyatakan dalam ribuan Dolar Amerika Serikat, kecuali dinyatakan lain PT PERTAMINA PERSERO AND ITS SUBSIDIARIES NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS As of December 31, 2015 and for the Year Then Ended Expressed in thousands of US Dollars, unless otherwise stated 76

4. AKUISISI DAN PENAMBAHAN PARTICIPATING INTEREST lanjutan

4. ACQUISITION AND

ADDITION OF PARTICIPATING INTEREST continued g. Penambahan 29.5 participating interest PHE Nunukan Company di Blok Nunukan g. Addition of PHE Nunukan Company 29.5 participating interest in the Nunukan Block Berdasarkan Surat Dirjen Migas tanggal 18 Agustus 2015 No. 1045613DJM.E2015 Pemerintah menyetujui pengalihan participating interest dari PT Medco EP Nunukan kepada PHE Nunukan Company sebesar 29.5 dan Videocon Indonesia Nunukan Inc. sebesar 10.5, sehingga komposisi participating interest di Wilayah Kerja Nunukan menjadi : PHE Nunukan Company 64.5, BPRL Ventures Indonesia B.V. 12.5 dan Videocon Indonesia Nunukan Inc. 23. Based on the Directorate General of Oil and Gas letter No. 1045613DJM.E2015 dated August 18, 2015, The Government approved the transfer of participating interest of PT Medco EP Nunukan to PHE Nunukan Company of 29.5 and Videocon Indonesia Nunukan Inc. of 10.5. The composition of the participating interest in the Nunukan Block: PHE Nunukan Company 64.5, BPRL Ventures Indonesia B.V. 12.5 and Videocon Indonesia Nunukan Inc.23. h. Akuisisi participating interest di Blok Abar h. Acquisition of participating interest in Abar Block Berdasarkan Surat Direktorat Jenderal Migas tanggal 18 Maret 2015, Pemerintah menunjuk Pertamina sebagai pengelola Blok Abar. Pada tanggal 22 Mei 2015, PT PHE Abar dan SKK Migas menandatangani KKS atas Blok Abar untuk jangka waktu kontrak 30 tahun. Based on the Directorate General of Oil and Gas Letter dated March 18, 2015, The Government appointed Pertamina as the operator of Abar Block. On May 22, 2015, PT PHE Abar and SKK Migas signed PSC for Abar Block for a period of 30 years.

i. Akuisisi participating interest di Blok

Anggursi i. Acquisition of participating interest in Anggursi Block Berdasarkan Surat Direktorat Jenderal Migas tanggal 18 Maret 2015, Pemerintah menunjuk Pertamina sebagai pengelola Blok Anggursi. Pada tanggal 22 Mei 2015, PT PHE Anggursi dan SKK Migas menandatangani KKS atas Blok Anggursi untuk jangka waktu kontrak 30 tahun. Based on the Directorate General of Oil and Gas letter dated March 18, 2015, The Government appointed Pertamina as the operator of Anggursi Block. On May 22, 2015, PT PHE Anggursi and SKK Migas signed PSC for Anggursi Block for a period of 30 years.

j. Akuisisi participating interest di Blok MNK

Sakakemang

j. Acquisition of participating interest in MNK

Sakakemang Block Berdasarkan Surat Direktorat Jenderal Migas tanggal 18 Maret 2015, Pemerintah menunjuk Pertamina sebagai pemegang 50 Participating Interest Blok MNK Sakakemang Sumatera Selatan. Participating interest lainnya di KKS Blok MNK Sakakemang dimiliki oleh Bukit Energy Indonesia Pte, Ltd. 50. Pada tanggal 22 Mei 2015, PT PHE MNK Sakakemang, Bukit Energy Indonesia Pte, Ltd dan SKK Migas menandatangani KKS atas Blok MNK Sakakemang untuk jangka waktu kontrak 30 tahun. Based on the Directorate General of Oil and Gas Letter dated March 18, 2015, The Government appointed Pertamina as the holder of 50 Participating Interest in MNK Sakakemang Sumatera Selatan Block. The remaining participating interest in MNK Sakakemang Block PSC were held by Bukit Energy Indonesia Pte, Ltd. 50. On May 22, 2015, PT PHE MNK Sakakemang, Bukit Energy Indonesia Pte, Ltd. and SKK Migas signed PSC for MNK Sakakemang Block for a period of 30 years.