Afren plc and Partners Optimum Petroleum Development Ltd and Lekoil Limited announce the suspension of current drilling operations at the Ogo prospect located on the OPL 310 licence offshore Nigeria and an update on estimated gross mean recoverable resources, significantly ahead of pre-drill expectations.
OPL 310 is located in the Upper Cretaceous fairway that runs along the West African Transform Margin. Extending from the shallow water continental shelf to deep water, the block represented a wild cat exploration opportunity in an under-explored basin. Detailed pre-drill evaluation of the block identified several prospects lying in the same Turonian, Cenomanian and Albian sandstone intervals that have yielded significant discoveries in Ghana and Côte d'Ivoire. The first exploration well drilled by the Partners was the Ogo prospect, a four-way dip-closed structure in the Turonian to Albian sandstone reservoirs, which was targeting 78 mmboe of gross P50 prospective resources. The drilling programme included a planned side-track, testing a new play of stratigraphically trapped sediments that pinch-out onto the basement high targeting 124 mmboe of gross P50 prospective resources. In total, the Partners were targeting 202 mmboe of gross P50 prospective resources.