Abstract
Principles of sequence stratigraphy have been applied in the study of the Emi Field, Offshore Depobelt, Eastern Niger Delta. Using 3D seismic data, wireline logs of six wells, check shots, and biostratigraphic data sets, two sequence boundaries and three maximum flooding surfaces were identified as the key surfaces of three depositional sequences. Marker shales, characterized by index fossils Haplophramoides-24 and Bolivina-48 were used to date the maximum flooding surfaces, separated by the 5.6 Ma and 4.1Ma sequence boundaries. Based on log motifs and biostratigraphic data, the stratigraphic interval penetrated by the six wells was inferred to be
deposited in a neritic paleoenvironment. Two major faults named F1 and F3 run across the study area and closures considered as good hydrocarbon prospects were identified and delineated. Analysis of horizons within the sequences and individual systems tracts reveals that hydrocarbon is hosted both in reservoirs within the transgressive systems tracts and highstand systems tracts. The existence of reservoirs, and the presence of well-developed fault systems in the sands associated with the systems tracts, indicates that the Emi field has great potential for hydrocarbon productivity.