Geological Behavior (GBR)

This study evaluates the petrophysical characteristics of Ogba Field in the Niger Delta Basin, Nigeria, using well log data (gamma ray, resistivity, neutron, and density logs) from two wells (Ogba-1 and Ogba-2) and core data from Ogba-4ST. The research quantifies key petrophysical parameters including shale volume, total porosity, water saturation, permeability, and net-to-gross ratios to understand reservoir properties. Results show that Ogba-1 generally exhibits lower shale content (Vsh 0.19–0.21), higher porosity (0.17–0.22), lower water saturation (0.02–0.14), and higher permeability (1851–2931 mD) compared to Ogba-2, indicating high reservoir quality. Well correlations reveal laterally continuous sand bodies interbedded with shale layers typical of a fluvio-deltaic depositional environment. Integration of well log and core data confirms distributary channel to mouth bar systems with periodic tidal influence. The study provides a practical workflow for reservoir characterization in data-limited siliciclastic settings of the Niger Delta.