DEADLINE EXTENSION FOR SUBMISSION OF PROPOSALS AND AMENDMENT TO ONE ELEMENT OF THE TERMS OF REFERENCE Luanda, September 2015 - Sonangol E.P., as the national concessionaire of the mining rights for exploration, development and production of liquid and gaseous hydrocarbons in Angola, would like to inform the prequalified companies (listed below) for the blocks in the onshore areas of the Lower Congo (CON 1, CON 5 and CON 6) and Kwanza basins (KON3, KON 5, KON 6, KON 7, KON 8, KON 9 and KON 17) the following: The deadline for submission of the proposals for the bid rounds of the blocks mentioned above, originally scheduled for September 18th, 2015 shall be extended to October 01st, 2015. Due to an error, the Terms of Reference that were published in the press release regarding the opening of the bid rounds, stated that the Minimum Work Program for the Initial Exploration Phase should include, among other requirements, 750 km2 of 3D seismic Long Offset. Therefore, we would like to rectify it and inform that the Minimum Work Program for the Initial Exploration Phase should include, among other requirements, 750 Km of Linear Seismic 2D Long Offset. Rua Rainha Ginga, nº 29/31 – R/C – C. Postal 1316 – Luanda – República de Angola Companies Prequalified as Non- Operator Global Geociências Plutonium Energy, S.A. ABC-Angola Business Corporation AGS Ambioil Angola Oil Company, SA ANS Antonio J.Silva Grupo Chamavo Grupo Gema Isoil Kalunga -Freedom Oil Kotoil Canonici Energy Casicel CME Africa Comptec Cuando Oil & Gas Dikanga Enix Oil Explomining GDK Geotec Lulombo Lumbo Investimentos Maersk Miriade Exportação de Petróleo Mitsubishi NAGS Obrangol Oceanprest Services Petrobras Pleos Energy Poliedro PPSS Prodiam Prodoil Projecto Lingueno Samanhonga Sands Oil and Gas SDGB Servicab SOCOCO Soklinker SPF STILIAM Tusker Energy Underwater SA Upite Companies Prequalified as Operator Acrep AIS Integrated Alfort Petroleum Interserviços Lagoon Exploração Luluoil Alper Oil Chevron Dragon Oil EC e MDS Ecopetrol SA ENI Enterprises King Oil & Gas, SA GALP Energy Glencore Integra Oil Mubadala Petroleum Multiply Oil Nzadioil OK Energy Limited OMV Exploration & Production Onoil Pacific Rubiales Energy Simples Oil Socar Society for the Development of Angola Soconinfa Somoil Sonangol Sinopec International Sosoil Sterling Energy PLC Sunshine Tethis Petroleum Partex PCK Pluspetrol Tullow Angola B.V Umbono Gabinete de Comunicação e Imagem da Sonangol E.P., em Luanda, aos 15 de Setembro de 2015. Rua Rainha Ginga, nº 29/31 – R/C – C. Postal 1316 – Luanda – República de Angola