We carried out a screening study for an exploration license in an ultra deep water section of the territorial waters of Senegal. A range of potential prospective oil field sizes were evaluated ranging from 150-800 million barrels recoverable. The study’s key objective was to establish if economic solutions could be established for development of these prospective fields based on FPSO and subsea technology. Exploration, appraisal, development and operating cost estimates were generated using our NETCO$TER Cost Evaluation Software.