Reservoir characterization and prospect identification in Onka field, offshore, Niger Delta

The study is focused on the use of 3D seismic, well logs and checkchots data to delineate, evaluate and characterize reservoirs relating to their hydrocarbon potentials.Four localized wells were available for this study.The study location is Onka field, offshore, Niger Delta.Well correlation and detailed petrophysical analysis was carried out along all the wells.Three reservoirs were discerned within the agbada formation.Among these delineated reservoirs, reservoir 2 occurs to be the most prolific with average gross thickness of about 49ft, net pay thickness of about 43ft, average net to gross thickness of approximately 71%, a good porosity of 20% and hydrocarbon saturation of 81% which is more blatant in well DESLA 1ST2.Seismic interpretation shows the presence of 26 faults.The faulting system corresponds with the geology of the Niger Delta.From the generated structural surface map of Reservoir 2, Fault F7 at the flank of the crest forms an antithetic fault type with both F7A and F7B.This also aligns with the mundane trapping system of the study area.It is recommended that more wells should be drilled at strategic locations to provide more data that will contribute to quality reservoir models.