Symbols Used in Log InteSymbols Used in Log Interpretationrpretation

Resistivities:

Rt    - Resistivity of the formation  in the virgin zone, ohm-m

Rxo  - Resistivity of the flushed zone, ohm-m

Rs   - Resistivity of the shoulder (adjacent) beds, ohm-m

Rm  - Resistivity of the mud, ohm-m                                  Rmc - Resistivity of the mud cake, ohm-m

Rw   - Resistivity of 100%  formation water, ohm-m

Rmf  - Resistivity of 100%  mud filtrate      , ohm-m

Saturations:

Sxo  -Mud filtrate saturation in the flushed zone, %

Sw   - Water saturation in the virgin zone, fraction of pore volume in, %

Diameters:

dh   - Diameter of the hole, m                                                                di    - Diameter of the flushed zone, m

DRi    - Diameter of the flushed and transition zones together, m

Thicknesses:

h    -Height of the bed being logged , m                           hmc  - Thickness of the mud cake, m