..., a calibration for w is obtained from observed neutron counting rates. However, previously reported systems were calibrated using only NaCl solutions. Variations in hydrogen content of solutions with the same w have been found to yield different neutron count rates, and therefore different apparent w values...

... log analysis concentration well logging water quality mud filtrate divalent cation NaCl solution formation factor evaluation Formation Resistivity Factor permeability water well determination resistivity grain size interpretation Formation Resistivity INTERPRETATION OF ELECTRIC LOGS...

... with temperature are graphically shown and these variations have been further compared to those of a standard NaCl solution of fixed concentration. The variation of the ratios Rm/Rmf and Rm/Rmc with changing concentration and temperature was also studied. It can be seen from the plotted results that the use...