Vertical Fluid fluid characterization Our BStratSight™ fluid characterization product comprises of a set of measurements with interpretation applied to provide a general fluid characterization. Fluid temperature and conductivity are measured inside the borehole and formation resistivity is measured with enough depth of investigation to avoid potential borehole skin effects and invasion. Under static conditions sensitive vertical fluid variations are expected to replicate inside the borehole. When combined with porosity data, it is possible to derive formation water resistivity (Rw) from resistivity measurements in sand/gravel levels (clay/silt-free). Processing is applied to derive salinity estimates from conductivity and formation resistivity. Formation water resistivity can be linked with borehole measurements to provide insights far from the borehole wall and evaluate the vertical fluid stratification (if any). Furthermore, integration with lithology and porosity-permeability frameworks can provide powerful insights on aquifer distribution and thickness.