Fig. 12
Correlation of reflectivity, velocity and vp/vs. Two P-wave seismic sections (left and right) from the conventional 3D seismic, overlain with vp/vs ratio, vp and vs velocities. Center; seismic facies classification and vp/vs ratio from Fig. 11, showing position of the sections. The sections were chosen because of their different vp/vs ratios and seismic facies classifications. vp/vs shows a good correlation with P-wave reflectivity. The vp/vs ratio was derived using the interval traveltimes (Eq. 2), whereas the smoothed velocities (vp, vps) were determined using interactive velocity analysis, from which vs was derived using Eq. 3. Top Upper Jurassic (Top Priabonian) horizon is indicated by the green line. The sections are flattened to Top Priabonian