ABSTRACT: LOTUS(tm) Template for Calculating Well Logs
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 sa
twater 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.
AAPG Search and Discovery Article #90991©1993 AAPG Mid-Continent Section Meeting, Amarillo, Texas, October 10-12, 1993.