Abstract
Calculating well logs is a time-consuming process. This template uses input parameters consisting 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 saltwater saturation cutoff for the pay zone. These parameters are used to calculate apparent water resistivity, saltwater saturation, bulk volume water, ratio of apparent water resistivity to input water resistivity, irreducible saltwater saturation, resistivity volume of shale, permeability, and a derived porosity value. A print out of the results is available through the lotus print function. Using this template allows maximum control of the input parameters and reduces hand calculation time.
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