Interpretation - Cased-Hole Log Analysis and Reservoir Performance Monitoring - page 133

Fig. 10.2 Flow rate and holdup chart—Courtesy Schlumberger
Notice that the gradiomanometer log (Fig. 10.3 ) has both a direct recording (the
solid trace) and an amplified trace (dotted). It is customary to use the amplified trace
since it allows better resolution. However, since use of the amplified trace requires
a rescaling in terms of heavy-phase holdup, the amplified gradiomanometer trace is
usually read in terms of chart divisions.