Lorenzo Perozzi edited Becancour like1.tex  over 9 years ago

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\subsubsection{Bécancour-like scenario}  In Figure \ref{fig:fig8} shows the corridor stack for 7 offsets. For  each corridor stack, black traces refer to the baseline survey. Red survey and red  traces refer to CO$_2$ injected scenario. A travel-time delay due to the CO$_2$ injection is well detected starting at 500 ms. The effect of CO$_2$ is mainly observed by a travel-time delay. Other authors reported similar obervations \citep{Yang2014,Arts2004}. We can also notice an AVO anomaly with an amplitude increase with the offset at the basement reflector. Since the saturation and the CO$_2$ plume shape doesn't do not  evolve too much in the time-lapse modeling, we do not have significant variation between repeated monitoring.\\ Figure \ref{fig:fig11} shows the comparaison of the seismograms obtained from a stochastic geological model (left) versus a blocky model (right) for atime-lapse of  5 years. years time-lapse.  As expected, the lack of detail in the block blocky  model is reflected in the seismograms. For exemple, the time-delaythat appears at  atabout  500 ms due to the CO$_2$ for the stochastic seismigrams, ms,  is not observable in the block blocky  seismograms.