Reservoir Characterization of an Onshore Geofield in Niger Delta, Nigeria, using Offset Well Data

Three wells (GE_11, G_12 and G_13) in an onshore geofield in the Niger Delta, Nigeria, were used to characterise the reservoirs of the oil field. RokDoc (5.1) and Petrel (2014.1) software were employed for data analysis and characterisation of the reservoirs. A comprehensive petrophysical analysis of each well was carried out in other to ascertain the physical properties such as shale volume, porosity, fluid saturation, net pay thickness and gross pay thickness. The well information was also used to evaluate the lithology and hydrocarbon depth. The hydrocarbon depths in the reservoirs ranged from 3292 to 4121 m, while the hydrocarbon saturation ranged from 0.671 to 0.982. The water saturation ranges from 0.042 to 0.446, while the porosity ranges from 0.145 to 0.216. The bulk volume of water was estimated to vary from 0.015 to 0.025. The reservoir units across the three wells have parameters detailing a characteristically hydrocarbon-bearing reservoir.