The Study of 3d Seismic Velocities on Depth Conversion and Reservoir Volumetrics in “Akos Field”, Onshore Niger Delta

Abstract

The study investigated 3D seismic velocities as playing a vital role in accurate depth conversion and volumetrics using the “Akos field” as a case study to be revisited for previously bypassed information as well as enhanced information on estimation of target depth and volumetrics. The petrophysical properties revealed a porosity that ranged from 20% to 30%.. Main oil accumulations lie between 6500ft subsea and 11500ft subsea at the central part of the field. Various velocity models were applied to depth conversion and volumetrics and the most suitable with respect to volumetric output, closeness to zero offset, “fit to well” and formation dependence was identified. This study  proved to be useful in the creation of a reference material for marginal field operators and operator of fields that are being revisited.