Shallow water Gabon 3D: focused processing images pre- and post-salt prospectivity
Paolo Esestime, Howard Nicholls, Karyna Rodgriguez, Neil Hodgson and Laura Arti
Journal name: First Break
Issue: Vol 36, No 3, March 2018 pp. 55 - 60
Info: Article, PDF ( 778.39Kb )
Price: € 30
In 2017 Spectrum conducted a major 3D seismic acquisition programme of approximately 11,500 km2 in shallow water offshore South Gabon (Figure 1). The project was carried out in close collaboration with the Gabonese Authorities (Direction Generale des Hydrocarbures; DGH) and was driven by renewed interest in a proven hydrocarbon province. Continuing exploration since the 1960s has proven all the key elements: source rock presence and maturity, reservoir presence and effectiveness, seal and oil charge into structural and combined structural-stratigraphic traps. Indeed, many oil fields, such as the Olowi Field, have been discovered and are producing in the onshore and nearshore. Like other Central Atlantic Margins, the geological evolution created two completely different geological settings offshore Gabon, subdivided by a mobile layer of evaporites, which separate the syn-rift section from the post-rift. Each section has a different paleo-geographic evolution, both with oil-prone source rocks. Carbonate and clastic reservoirs have been proven in the post-salt; good quality sands (Gamba and Dentale Fms.) are also proven in the very late syn-rift.