119 3. Borehole geophysical methods (a) (b) (c) (d) Figure 3.2 Seismic velocity to porosity transforms using long normal resistivity logs and Faust’s law. (a) Borehole location, (b) seismic velocity log and log normal resistivity log at borehole M09, (c) long normal resistivity log Rt, resistivity log Rt-seis converted from seismic velocity log using Faust’s law, estimated seismic porosity log using Archie’s law, (d) porosity and velocity seismic sections.
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