ABSTRACT
This research involves the petrophysical evaluation of reservoir quality in an offshore depobelt of Niger Delta. The research was essentially undertaken to evaluate petrophysical properties of each of the reservoirs identify in the field, and such properties include gross, net sand, net to gross, porosity, permeability, water saturation, hydrocarbon saturation and shale volume. Four reservoirs, C3000, D2000, D3000 and D4000 were identified, penetrated by well 27 and 34; the reservoirs were correlated across the two wells using gamma ray logs and resistivity log. The reservoirs were penetrated at the following depths 5966-6037ft, 6639-6722ft, 6733-6885ft and 6913-7071ft on well 27 and 5911.16-5952.54ft, 6556.18-6632.53, 6647.65-6795.44ft and 6829.64-6953.43ft, on well 34. The reservoir have an average gross thickness, net sand, net-to-gross thickness and shale volume of 56.26-150.4ft, 46.6-93.5ft, 0.61-0.87, 0.1865-0.3276. The porosity, permeability, water saturation and hydrocarbon saturation range are 23-29%, 120-540md, 11-34% and 66-91% respectively. The reservoir rock type is basically sandstones intercalated with shales which constitute the source and the seal rocks. From the result of the average petrophysical parameters, it can be inferred that these reservoirs are economically viable for hydrocarbon production.
