Deep Play prospectivity of U- Field onshore Niger Delta Basin
This study Integrated structural interpretation with some aspects of regional stratigraphy concepts that allowed for the prediction of sand fairways and their gross depositional environment to evaluate the unpenetrated deep prospect of the U-Field onshore Niger Delta. Gross Depositional Environment model was established based on an integration of evidences from seismic, well data and paleo-bathymetric profile of wells within the area. Sequence stratigraphic analysis derived from an integration of both biostratigraphic data and chronostraigraphic chart, enabled the definition of an objective interval both on the strike and dip directions between 23.2 Ma MFS and 26.2 Ma MFS. This interval fell within the Shelf Margin Gross depositional environment with characteristic wedge-like gently dipping seismic facies geometry on seismic. The target reservoirs are sequences of potential LST/TST shelf margin sand packages which have a potential analogue along the strike direction. The prospect trap consists of a four-way dip closure with both a three way and two way components. The main risks identified for this prospect are reservoir presence and seal integrity. The geologic risk assessment result performed gave a possibility of success value of 0.4, which is considered acceptable at the exploration stage.
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