Reservoir Characterisation Of Konga Field,Onshore Niger Delta,Southern Nigeria.

Abstract

The evaluation of the reservoir characterization of KONGA Field, Onshore Niger Delta, Southern Nigeria using a suite of wireline logs from five (5) wells and biofacies data was undertaken. Five reservoir sand units were identified.  These units were penetrated by three wells. The results revealed that the rock properties are variable and are controlled by environments of deposition during Oligocene – late Miocene. Reservoir sands were found to range from 2496.73m/s to 2687.65m/s (8191.37ft/s – 8817.73ft/s). The porosity of reservoir sands, which ranged from 17.34% to 22.78%, was good to very good. Their permeability, with average field range from 35.03mD to 103.68mD, was moderate to good.  Hydrocarbon saturation was high in all the reservoir sands, ranging from 73.16% to 84.90%, with corresponding water saturation from 15.10% to 26.84%. Water saturations were not irreducible for reservoir sands I and J. The oil and gas yield of the field is high and can be exploited at profit.

Keywords-wireline logs, reservoir, porosity, permeability, water saturation.