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doi:10.2204/iodp.proc.322.201.2013

Porosity calculations

Using the previously discussed Archie relationship between porosity (φ) and measured LWD resistivity (Ro) and the temperature-corrected fluid resistivity (Rw) it is possible to estimate a complete porosity profile. As determined from previous work in the Nankai Trough area and previous NanTroSEIZE expeditions (Kinoshita et al., 2008), m = 2.4 and a = 1. Both bit and ring resistivity were used to calculate two separate porosity profiles, for each temperature-corrected fluid resistivity.