Predicting Coastal Depositional Style: The Role of Accommodation/Sediment Supply and Basin Morphology within a Sequence Stratigraphic System on Selected Wells (Mid Miocene to Pliocene) in Coastal Swamp Depobelt, Niger Delta Basin, Nigeria

Chiaghanam, O.I., Nwozor, K.K., Chiadikobi, K.C., Egbunike M.E., Nwokeabia, C.N., Omoboriowo, A.O., Uwajingba, H.C.


The depositional style of mid- Miocene to Pliocene sediments of selected wells in Niger Delta was studied to ascertain its dominating and influencing depositional system. The Ainsworth predictive model/trends were applied in determining the depositional system and styles, which takes into consideration the Basin morphology and accommodation/ sediment supply regime within a sequence stratigraphic system. The study suggests that depositional style of sequences 1,2,5 and 6 are fluvial- dominated, tide-influenced environment, which is marked by low wave effectiveness, high sediment supply/low accommodation and moderately embayed shoreline morphology, while sequences 3,4 and 7 are wave dominated, tide-influenced environment, which was noted with high wave effectiveness, low accommodation/high sediment supply and moderately embayed shoreline  morphology. This study shows that the underlying basis morphology (moderately embayed) played a significant role in predicting the depositional style of the study area.

Keywords: sequence stratigraphy, accommodation/sediment supply, basin morphology, Depositional style and Niger Delta Basin.

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ISSN (Paper)2224-3216 ISSN (Online)2225-0948

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