122 Well seismic surveying and acoustic logging direction, the distance between two reflecting points is 5 m. The depth sections were deconvolved to increase the vertical resolution. They were then integrated to transform a 3D amplitude block into a pseudo velocity block, using velocity functions (sonic logs recorded at wells C1, MP5, MP6, M08, M09) as constraints. The pseudo velocity sections of the 3D block thus obtained were merged with those obtained by refraction tomography to create a 3D extended velocity model from the surface (Figure 5.3). Figure 5.3 3D seismic processing. Top left: in-line 31 pseudo-velocity section (upper part: zoom of 0 to 35 m depth interval). Top right: pseudo-velocity map at 87 m depth. Bottom left: in-line 21 pseudo-velocity and porosity seismic sections. Bottom right: cross-line 24 pseudo-velocity and porosity seismic sections. Figure 5.3 top left shows the results obtained for the in-line 31 seismic section extracted from the 3D extended velocity model. It also shows the velocity map at a depth of 87 m (Figure 5.3 top right). The 3D velocity model shows the large
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