Petrophysical Attributes and Reservoir Volumetrics in “Akos Field”, Onshore Niger Delta

Abstract

This research study reveals that the field had about twenty four payzones with few being close to each other and main oil accumulations lie between 6500ft subsea& 11,500ft. Reservoirs are predominantly are lower deltaic shoreface deposits comprising distributary channels, tidal channels & barrier bar sheet sands within a paralic sequence. Reservoir performance by H20 drive ; natural support from large radial 2 semi radial aquifers. Wavelets for the seismic to well tie was estimated between 1900 and 2680 and a  good seismic to well tie was achieved, of the three velocity models proposed, the third models V= V0+K(Z-Z0) seemed to give the best output in terms of volumetric STOIIP performed on the reservoir.  Other advantages included the fact that it was formation (geology dependent) and “fit to well”. On the other hand it proved to be more time consuming. Most of the perforated  wells have limited sets of perforation and some thick hydrocarbon pay intervals have not been perforated suggesting that there still lies a lot of potential in the field. The field generally showed good porosity ranging from 30% at seven thousand feet subsea to 20% at 13,000 feet subsea. Permeability of the field generally ranges from seven hundred and fifty milidarcies to to darcies