of CALIBRATION TECHNIQUES FOR RADIATION WELL LOGGING IN HAWAII

The programs and activities described herein were supported in part by funds provided by the United States Department of the Interior as authorized under the Water Resources Act of 1964, Public Law 88-379. Neutron count data for calibration purposes ~ere collected by neutron logging in 4 boreholes ~ and porosity data ~ere deter-mined from photo logs run on the same 4 boreholes. A neutron count-porosity calibration curve was constructed and ~as found to take the form of the logarithm of n~dtron count versus poros-ity. The calibration cUPVe ~as calculated by linear regression analysis ~ utilising empirical field data. The calibration curve is valid ~thin the expressed 95 percent confidence intervals only for neutron logs from (1) basaltic formations ~ (2) uncased hole8 ~ and (3) borehole diameters from 20.32 to 30.48 em (8 to 12 in.)