Characterization of reservoirs of oil-well-OJ1 to identify lithofacies, interpret the depositional environments and sequence stratigraphic in Field X in the Niger Delta, Nigeria

Hydrocarbons migrate through porous and permeable rock layers until they are trapped by impermeable rock formations, such as shale or salt layers, preventing further migration and creating reservoir. Consequently, the objective of this paper was to characterize the reservoirs of oil-well-OJ1 to identify lithofacies, interpret the depositional environments and sequence stratigraphic units in Field X in the Niger Delta, Nigeria using appropriate standard methods of the well logs. The results reveal a combination of fluvial, deltaic, and shallow marine environments, each playing a vital role in reservoir development. Sequence stratigraphic interpretation revealed that Reservoir A belongs to a Lowstand Systems Tract (LST), while Reservoirs B and C are associated with Transgressive Systems Tracts (TST), marked by retrogradational stacking patterns and maximum flooding surfaces These findings provide key insights into reservoir heterogeneity, connectivity, and compartmentalization, which are crucial for predicting hydrocarbon flow behaviour. Ultimately, this study contributes to improved exploration and production strategies in Field X by characterizing the lithofacies, depositional environments, and sequence stratigraphy of the reservoirs in which the methodology and findings are transferable enabling more effective exploration and development strategies in other geologically similar fields across the basin.