Ghana
Offshore / Exploration
AMNI International Petroleum Development Company Limited (Ghana), (‘AMNI’), holds 85% participating interest and operatorship of the 279 km² Central Tano Block (‘CT Block’) situated in the Tano Basin, along the highly productive part of the transform margin, offshore Ghana. The remaining interest is held by the Ghana National Petroleum Corporation (GNPC) (10%) and a local partner WCW (5%). The block lies some 60 km offshore, in water depths between 300 and 1,500+ metres, bounded by the prolific Deepwater Tano and Cape Three Points Blocks and the very large Jubilee, Teak, Akasa and TEN (Tweneboa-Enyenra-Ntomme) fields play fairways. To date, the Tano Basin remains the most successful, oil prone play fairway west of the Nigerian delta.
AMNI has drawn on the experience of new technical experts who have previously worked in Ghana on the Jubilee field, which has resulted in new reprocessing and re-mapping of the available 3D seismic across their acreage. This has involved incorporation of higher angle offsets from the stacked 2010 3D data than was previously and is typically used, to define AVO (Amplitude Versus Offset), but which was critical in unlocking the prospectivity of the Jubilee field in the Ghana play fairway. The results of this new AVO-driven interpretation has revealed new prospectivity, including the large Falcon Prospect in the post-rift Campanian stratigraphy on the western margin of the AMNI Block. The new Falcon Prospect’s AVO supports the confidence of good stacked reservoir, hydrocarbon charge and fluid volumes that lie on the north eastern extension of the productive TEN Field Fairway Complex, and strong correlation to the existing fields. The Falcon prospects location also materially reduces the threshold economics of a discovery due to its proximity of the gathering and export infrastructure of the TEN field in the adjacent acreage which is also known to have spare capacity
The Campanian Falcon Prospect is thought to be an extension of the Cretaceous TEN field facies fairway from the southwest into the western margin of the CT Block. The new AVO interpretation and associated fluid volume calculations support an estimated prospectivity of ~600 MMBBLS in place within four stacked Campanian sands. These can be sourced from the underlying Turonian shales and sealed above by shale and on the East side by an erosional unconformity. Interestingly, the upside could be significantly larger, as the Jubilee field, the initial AVO defined fluid volumes calculated, were bigger when developed due to inherent AVO dimming with stacked reservoirs.
The new AVO interpretation also reconfirms the larger Kusia-1X Prospect, which now has estimated resource potential of over 1 Bn bbls in place within the Santonian /Albian targets. Although this was an earlier target for drilling, the new Falcon prospect is seen as lower risk due to its location and interpretation as an extension of the proven-producing TEN Field play fairway. The Kusia-1X prospect therefore remains a key follow-on target which could be tied back to any discovery made with the next well at Falcon.
AMNI now plans to drill the Falcon Prospect in early 2027, to a depth of 3,125 m sub-sea in 1,100 m of water, at an estimated cost of US$ 55 million (dry hole), following the rig contract signed in late 2025. They are looking for a partner to join them and earn a material equity interest in the Block, in return for a contribution to past costs and the funding of the planned drilling programme.
