Calculation of well logs is a time consuming process. This template uses input parameters which consist of well name, location, county, state, formation name, starting depth, repeat interval, resistivity of shale, and irreducible bulk volume water which provides heading information for print outs. Required information from basic well logs are porosity, conductivity (optional), formation resistivity, resistivity of the formation water for the zone being calculated, resistivity of the mud filtrate, the porosity cutoff for pay in the zone being calculated and the salt water saturation cut off for the pay zone. These parameters are used to calculate apparent water resistivity, salt water saturation, bulk volume water, ratio of apparent water resistivity to input water resistivity, irreducible salt water saturation, resistivity volume of shale and a derived porosity value. A hard copy print out of the results is available through the Lotus® (Lotus® is a registered trademark of Lotus Development Corporation) print function. Using this template allows maximum control of the input parameters and reduces hand calculation time.