Two Dimension Seismic Modeling and an Understanding of Wave Propagation trough a Viscoelastic Media

In order to produce synthetic seismograms from acoustic, pure elastic, and viscoelastic seismic modelling and conduct a comparison among the different datasets, we have used an open 3D finite-difference seismic modeling package produced by Karlsruhe Institute of Technology (KIT) named SOFI3D.

SOFI3D code was built in order to take advantage of maximum computational efficiency, being implemented for parallel environment based message passing interface or MPI.

A cluster of 27 processing units (based on Geology and Geophysics Dept. of Universidade Federal Fluminense) and high speed network are the hardware used to produce the results which are presented and discussed in in this work.

Eight different shot gather synthetic seismograms were produced using the same earth model. Thus a roll/flip comparison is done in order to understand what happens on the wave field reflection at each model configuration.

Significant differences in attenuation effects have been obseved between elastic and viscoelasitc modelign results. Several kinds of geological configurations are quite dispersive and there is an effect in signal to noise ratio, especially when dealing with unconsolidated sediments of shallower ocean bottom and dealing with heavy oil reservoir sandstones.