The Marmousi model was created in 1988 by the Institut Fran ̧cais du P ́etrole (IFP). The geometry of this model is based on a profile through the North Quenguela trough in the Cuanza basin. The geometry and velocity model were created to produce complex seismic data which require advanced processing techniques to obtain a correct earth image. The Marmousi dataset was used for the workshop on practical aspects of seismic data inversion at the 52nd EAGE meeting in 1990.
Marmousi RTM Seismic
The model underlying Marmousi was designed to be geologically plausible (i.e., based on a real situation) and complex, meaning that it should contain many reflectors, steep dips and strong velocity gradients in both vertical and lateral directions. Thus, obtaining a good velocity model and image should require the use of advanced velocity model estimation methods and prestack depth migration/inversion. The Marmousi model contains 158 horizontally layered horizons. A series of normal faults and resulting tilted blocks complicates the model towards its center. The model sits under approximately 32 m of water and is 9.2 km in length and 3 km in depth.
Marmousi RTM with velocity model
In the results that Tsunami is showing here, the Marmousi benchmark highlights the following achievements : the anticline (the upside-down “U” structures) at the bottom of the image are more clearly imaged, all of the faults are crisp, and all events clearly line up with the model. A Depth shift or sideways shift would show up here. The bright yellow spots correspond with a high velocity contrast. Higher amplitudes correspond, which are expected. Bigger reflection.
