Porosity and Saturation Estimation from 4D Seismic P Wave Impedance

C043 Porosity and saturation estimation from 4D seismic P wave impedance Abstract 1 We present a methodology for porosity and saturation estimation from a 4D P wave impedance data developed using Bayesian probability theory. The proposed methodology is tested on synthetic data considering two different states of knowledge about the reservoir at legacy data acquisition time (pre production) . We first assume that the initial saturation (Swi) of reservoir is well known. In this case we can infer the porosity values from the legacy data and water saturation from the monitor data assuming that porosity is not changed due to