Democratic Republic of São Tomé and Príncipe AAPG Conference Denver June 2009

1. Luís Prazeres Executive Director ANP-STP Democratic Republic of São Tomé and Príncipe AAPG Conference DenverJune 2009

2. Introduction This information is provided by ANP to Oil Companies as a introduction to the “Petroleum Geology and Prospectivity of Sao Tome and Principe” For further details, information about data packages and data rooms please contact: Luís Prazeres Osvaldo Abreu Executive Director Business Development National Petroleum Agency PGS Marine Av. Das Nacaoes Unidas 4 The Heights Caixa Postal N° 1048 Booklands, Weybridge Sao Tome, STP Surrey, KT13 0NY Tel: +239 226 940 Tel: +44 1932 376584

3. Introduction to Democratic Republic of São Tomé and Príncipe • Location:In the Gulf of Guinea, off the west-central coast of Africa, 250 kms (150 mi.) from Gabon • Capital: São Tomé • Land area: approximately 1001 Km2 • Maritime area: approximately 132,000 Km2 • Distance from Continent: 300 Km • Population: 160,000 (estimate 2007) • Climate: Tropical. Average temperature 26° C (78° F) on the coast; lower in the highland. Dry season June to August. Short periods of tropical rains during the rest of the year. • Official Language: Portuguese • Government: Semi-presidential Representative Democracy • Natural Resources: Cocoa, coconuts, bananas, coffee, palm oil, fishes, Petroleum (not yet exploited) • Export: cocoa, coffee, coconut, pepper • Currency: Dobras (STD) STP São Tomé

4. SAOTOMEAN INSTITUTION ANPAgencia Nacional de Petróleo (Agency of National Petroleum) Executive Director: Luis Prazeres • ANP is the regulatory authority for the petroleum operations (exploration, production and transport of hydrocarbons).

5. ANP - National Petroleum Agency Mission Statement • The mission of National Petroleum Agency of São Tomé & Principe (ANP-STP) is to enhance the value of the hydrocarbon resources of the country, by promoting a sustainable exploration and production with due consideration for the environment. • The ANP-STP shall carry out its duties in terms of the country's objectives, positioning itself as a credible partner for the world's oil industry. The Agency shall adopt a modern management style, upholding transparency and accountability that will contribute to the economic and social development of Sao Tome and Principe.

6. Blocks in São Tomé and Príncipe 1st Licensing Round Block Areas Block 1 – 3,600 km² Block 2 – 5,000 km² Block 3 – 4,200 km² Block 4 – 5,500 km² Block 5 – 2,800 km² Block 6 – 7,500 km² Block 7 – 9,400 km² Block 8 – 8,800 km² Block 9 – 8,400 km² Block 10 – 12,600 km² Block 11 – 9,800 km² Block 12 – 15,000 km² Block 13 – 14,100 km² Block 14 – 18,200 km²

7. São Tomé and Príncipe Exploration History Pre 1970 Oil seeps on the islands have attracted interest 1970 Ball & Collins licensed onshore and shallow offshore – drilled two shallow wells near seeps 1990 Island Oil drilled two deep onshore wells near seeps, including Ubabudo-1 drilled to 1501m 1998 Mobil held 18 month Technical Assistance Agreement for whole STP offshore 2001-2005 PGS acquired 10,000 km of 2D seismic in EEZ and 3000 sq km of 3D in JDZ

8. Seismic Coverage • PGS Data • ST01 • ST02 • ST05 • ST99 • Western Geco • ROAN

9. Ubabudo-1 several hundreds of metres of sand are present. In 1990-1991, Island Oil drilled two wells on the island of Sâo Tomé close to oil seeps. Esperanca-1 1990, P and A dry) drilled into Tertiary basalt with some Miocene carbonates, with TD at 859m. Ubabudo-1 (1990, P and A dry) , reached 1,501 m and encountered Upper Cretaceous clastics. Well Data

10. Regional Petroleum Geology

11. JDZ EEZ Gulf of Guinea Structural Elements • Toe Thrust Belt of Niger Delta • Low Relief Structures • Cameroon Volcanic Line (Uplifts and Volcanics) • Edge of Continental Crust and Salt Development (Fracture Zones)

12. Seismic Sections showing some structural features • Basement Faulting • Drape • Tertiary fans Brightening on structure Brightening on structure

13. Oil and Gas Kitchens Akata Formation Kitchen - in oil window due to low heat flow and diminished overburden Mid-Late Cretaceous Kitchen - areas with >3km of overburden Zone of potentially locally raised heat flow

14. São Tomé and Príncipe Seeps • Cretaceous oil is currently seeping in to this concrete emplacement of an artesian well on São Tomé. • Natural oil seeps from both islands belong to separate oil families, although similar in appearance and viscosity. • São Tomé similar to Azile and Anguille Fm sourced oils in Gabon. • Seeps in Príncipe more mature. • Slicks observed offshore Príncipe Oil seep at Ubabudo-1 Gas escaping at Ubabudo-1

15. Reservoir • Good quality sands have even been deposited as far south as Sao Tome. This slide shows some outcropping quartzose sands on the island together with a well drilled through several hundred metres of sands alternated with shales and volcanics, tentatively equivalent to the Agbada Formation.

16. Low relief structures, fracture zone drape and stratigraphic traps to south of toe thrust zone Major Tertiary fan systems Dominantly Cretaceous fan systems derived from Eq. Guinea margin Cretaceous structural traps and drapes over fracture zones with sediment derived from the Gabon and EG margin Play Fairways offshore São Tomé and Príncipe Distal toe thrusts of the Niger Delta JDZ EEZ

17. São Tomé and Príncipe 1st Licensing Round The First Licensing Round in the Sao Tome and Principe Exclusive Economic Zone is planned to open in Q4 2009, at which time further details will be available. In the mean time seismic and technical data is available to reviewed (PGS/London & ANP - STP)

18. São Tomé and Príncipe First License Round - Data Rooms Sao Tome Data Room Opens June 2009 UK Data Room Opens June 2009 • Key Technical Reports (Paper & pdf) • Technical Reports (pdf) • SMT Kingdom Project Data Room Rules Apply Details will be available on: www.anp-stp.gov.st

19. We welcome you in São Tomé and Príncipe For further information please visit www.anp-stp.gov.st