Petrophysical Characterization of the Reservoirs of ‘‘Fuja’’ Field, Offshore Niger Delta, Southern Nigeria


Authors : Agoha, C.C; Opara, A.I; Akiang, F.B; Onwubuariri, C.N; Okeke, O.C; Omenikolo, I.A; Okereke, C.N; Osaki, L.J

Volume/Issue : Volume 6 - 2021, Issue 7 - July

Google Scholar : http://bitly.ws/9nMw

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In order to have a good understanding of the rock properties of the reservoirs of ‘‘Fuja’’ Field, offshore Niger Delta, an evaluation of the petrophysical properties of this reservoir including total porosity, effective porosity, permeability, volume of shale, water saturation, hydrocarbon saturation and bulk volume of water was carried out. Bulk density and gamma ray logs from four different wells within the field were used with appropriate empirical equations to estimate these rock properties using Petrel and Ms-Excel software. Results show that the reservoir sand thickness varies from 32m to 208m with a field average of 110.9m, total porosity ranges between 0.002 (0.2%) and 0.255 (25.5%) with an average of 0.18 (18%), effective porosity ranges between 0.001 (0.1%) and 0.244 (24.4%) with an average of 0.16 (16%), permeability varies between 0.01mD and 197.18mD with an average of 28.0mD, water saturation varies between 0.11 and 0.87 with an average of 0.36, hydrocarbon saturation varies from 0.13 to 0.89 with an average of 0.64, while bulk volume of water ranges between 0.020 and 0.139 with an average of 0.053. On the average, the porosity of the reservoir sands in this field is good while the permeability is high. Apart from reservoirs E, K, Q and W with high water saturation, the other 20 reservoirs have low water saturation. Therefore, this field has good prospect for hydrocarbon exploration and production because of the low amount of water saturation and consequently high amount of hydrocarbon saturation in most of the reservoirs.

Keywords : Petrophysical Properties, Reservoir, Empirical Equations, Porosity, Permeability, Water Saturation

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