Interpretation - Cased-Hole Log Analysis and Reservoir Performance Monitoring - page 135

400

1

q w

300

200

2

100

3

0

0 100 200 300 400 500

4

q o

Fig. 10.4 Use of holdup and flow rate chart. Reprinted by permission of the SPE—from Curtis
(1967)

Thus, for any gradio reading, y h may be calculated for this particular log by:

gradio divisions
=+

y h 041 .

28 75 .

A more straightforward method is to simply plot a recalibration graph on a sheet of
linear graph paper as shown in Fig. 10.5.

Fig. 10.5 Recalibration of
gradiomanometer log in
terms of y h