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Swiss Journal of Geosciences
Fig. 16 | Swiss Journal of Geosciences

Fig. 16

From: A laboratory approach for the calibration of seismic data in the western part of the Swiss Molasse Basin: the case history of well Humilly-2 (France) in the Geneva area

Fig. 16

Comparison between grain density, seismic velocities and impedance measured in the laboratory with corresponding physical parameters from borehole logging. Compressional velocities along horizontal (red square) and vertical (blue circle) plugs have been calculated at in-situ condition applying the velocity/pressure derivatives using empirical formula of Wepfer and Christensen (1991). The vertical acoustic impedance has been used to calculate the reflection coefficient to simulate the normal incidence of seismic waves. Error bars are within symbols. Samples of Core IV are after: a Müller and Briegel (1977), b Freund (1992), c Yan et al. (2016)

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