Predicting overpressures and saturating fluids in Niger delta formations using Poisson’s ratio-diagnostic chart approach

Abstract

The focus in this research is based on the Poisson’s ratio and p-impedance plots of the suspect overpressure zones on a diagnostic chart developed to aid in pore pressure and saturating fluid confirmations within Niger Delta. Three points were used in the study involving wells PSW1 and PNW2 located within Port Harcourt Nigeria; at 67km S33.2oW and 113.6km N9.4oW respectively. While six points were used in the case of WSW3 located within Warri Nigeria at about 115.1km and S81.2oW where no prior confirmation existed or possibly the depth range of suspicion of overpressure was large. The saturating fluids were also revealed based on their locations on the diagnostic chart.