Inputs are highlighted in yellow and outputs are in green. Both reference and reservoir temperatures must be entered in degrees Celsius, degC=5/9*(degF-32).
The following standard inputs for the Simandoux equation must be entered:
- Rw at reference temperature (the value of Rw at a specific temperature)
- Rw reference temperature (the temperature at which Rw was measured at)
- Reservoir temperature (the estimated reservoir temperature)
- Tortuosity exponent (a)
- Cementation exponent (m)
- Saturation exponent (n)
- Effective porosiity (porosity which does not include clay bound water)
- Volume shale (the estimated shale volume from the reservoir interval)
- Deep resistivity (the average deep resistivity reading over the reservoir interval)
- Deep resistivity for shale (the estimated deep resistivity reading for an interval which is 100 percent shale)
In addition to Simandoux water saturation, outputs include Rw and equivalent salinity in ppm NaCl, at 23.9 deg. C (75 deg. F). The associated data point and values are plotted on the crossplot.
Please note that the Simandoux saturation is not limited to 1.00, to allow the user to see how parameter values affect Sw. This is important when using known water zones to help define parameter values.