Cuba Block 9 – Exploration Resource Potential

Block 9: Geological Characteristics Multiple plays in large compressional fold belt Lower Sheet Reservoir - - Predominantly of fine grained, fractured carbonates Targeting same main productive zone in existing fields in Cuba - Varadero wells have initial rates up to 3000 barrels/day per well Structure - - Large scale, broad thrusted anticlines - Definable on current coarse 2D seismic data grid Upper Sheet • • • Numerous smaller scale structures B1 Depth B m Itabo- Bolanos Guadal-1 0- Tertiary 1000 UPPER SHEET Mid-level Detachment 2000 3000 LOWER SHEET 4000 However, prospects hard to define on coarse 2D seismic data grid Multiple oil recoveries to date Tertiary Younger carbonate and clastic reservoirs • Only mild structural deformation Heavy oils - may require enhanced recovery methods 14

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