EMEREMGINI, Sharon Chioma

The necessity of prospect evaluation is undisputed both to translate geology into figures and to expand the uncertainty implicit in hydrocarbon exploration. In this study, the hydrocarbon potential of STOKED field in offshore coastal swamp Niger delta was evaluated to obtain more information about the structures, stratigraphy and hydrocarbon potential of the field from available seismic and a suite of well logs data. The method adopted involves delineation of lithologies from Gamma ray log, Identification of hydrocarbon bearing reservoirs unit from resistivity log, well to well correlation across the field, fault interpretation and horizon mapping, time to depth conversion, Attribute extraction determination of petrophysical parameters and volumetric estimation. One Major and twelve minor faults were interpreted mapped from the well correlation carried out across the four wells in the NE-SW Direction. Two reservoirs were interpreted, and the seed grids generated three top time structure maps. The attribute maps were used to establish the diagnostic ability of 3D seismic attribute analysis in enhancing seismic interpretation and volumetric estimation. Map based volumetrics was calculated and the stock tank oil initially in place estimated is 85 mmstb for reservoir A while reservoir B was inconclusive as the area extended outside the extent of the seismic. The result from the petrophysical analysis and property modelling has shown that the reservoirs have porosity values that range from 17 - 24%, and water saturation ranges from 11 - 56%. Results from this study have shown that, away from currently producing zone at the central part of the field, additional leads and prospects exist, which could be further evaluated for hydrocarbon production.