Tano Basin - Onshore to Tano Basin - Onshore to Shallow OffshoreShallow Offshore

Current licensing Current licensing map.map.

GeneraliseGeneralised d stratigrapstratigraphy of the hy of the Tano BasinTano Basin

Location of wells drilled on the shelf and onshore of Location of wells drilled on the shelf and onshore of the Tano Basinthe Tano Basin

Recent discoveries and prospects, offshore Tano BasinRecent discoveries and prospects, offshore Tano Basin

Diagrammatic representation of plays in the Tano BasinDiagrammatic representation of plays in the Tano Basin

Onshore Ghancan well correlations across Onshore Ghancan well correlations across the northeastern Tano basin marginthe northeastern Tano basin margin

Oil (MMBO)Oil (MMBO) S. TanoS. Tano 3-ax3-ax N. TanoN. Tano totaltotal

In PlaceIn Place 71.371.3 -- 53.653.6 124.9124.9

ReservesReserves 14.314.3 -- 1.11.1 15.415.4

Gas (Bscf)Gas (Bscf) S. TanoS. Tano 3-ax3-ax N. TanoN. Tano totaltotal

In PlaceIn Place 44.244.2 138.0138.0 102.0102.0 284.2284.2

ReservesReserves 18.018.0 102.0102.0 73.073.0 193.0193.0

In-place and recoverable oil & gas reserves, In-place and recoverable oil & gas reserves, North and South Tano structures (from GNPC)North and South Tano structures (from GNPC)

North Tano: Depth map (feet) : Intra North Tano: Depth map (feet) : Intra Mid-Albian (after Phillips Petroleum)Mid-Albian (after Phillips Petroleum)

Geoseismic section from the North Tano Geoseismic section from the North Tano field to the northern basin margin (after field to the northern basin margin (after

GNPC)GNPC)

Location map of seismic lines available to the companyLocation map of seismic lines available to the company

Onshore seismic line GNPC87-5 north from Onshore seismic line GNPC87-5 north from Bonyere showing down-to-the-basin marginal Bonyere showing down-to-the-basin marginal

faultsfaults

Offshore dip seismic line ARTB88-17 (most of which lies Offshore dip seismic line ARTB88-17 (most of which lies within the licence area), showing faulting and a variety of within the licence area), showing faulting and a variety of

stratigraphic featuresstratigraphic features

Tano Basin LicenceTano Basin Licence

• Numerous seeps and shows onshoreNumerous seeps and shows onshore

• Seeps fed from offshore oil kitchensSeeps fed from offshore oil kitchens

• Onshore wells drilled without seismic Onshore wells drilled without seismic controlcontrol

• No wells in the offshore part of licenceNo wells in the offshore part of licence

• Thick sedimentary sectionThick sedimentary section

• Promising features on offshore seismic Promising features on offshore seismic lineslines