| Summary: | Simultaneous AVO inversion is novel method in reservoir characterization. The
method will produce several physical properties of reservoir such as P-wave Impedance, Swave
Impedance, density, Vp/Vs ratio, Lamda-rho and mu-rho. These physical properties
could be used to estimate the type and content of reservoir lithology. Simultaneous AVO
inversion needs P-wave sonic log, S-wave sonic log and density as input. S-Wave sonic logs are
rarely available due to the expensive cost of data acquisition. We generate synthetic S-wave
sonic log by mean Biot-Gassman Substitution method instead of the Castagna or Mudrock line
method and compare the results with the original S-wave sonic log. We use the synthetic Swave
sonic log, P-wave sonic log and density log to create the initial model for simultaneous
AVO (Amplitude versus offset) inversion. This initial model together with the seismic wavelets
which are extracted from 3D seismic data statistically to perform simultaneous AVO inversion
that will produce physical property like P-wave Impedance, S-wave Impedance, density and Vp/Vs ratio in a 3D cube
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