The feasibility analysis of seismic monitoring of fluids flow in reservoirs, through consecutive seismic acquisition (known as 4D or time-lapse seismic), should not involve just the the laboratorial evaluation of modifications on physical response caused by the fluids substitution with the consequent variation of the elastic parameters, but mainly a previous phase of seismic modeling, whose importance is among others, to quantify the impact of the tuning effect that can subvert the expected amplitude variations after the time-lapse. In this sense such effect needs to be carefully investigated because, due to fluids substitution at the reservoirs level, the tuning variation can introduce a very important factor of influence on the seismic amplitudes, what can makes unfeasible the interpretation of the seismic4D.
Time-lapse seismic; 4D; tuning
