Page 173 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2

144 Reservoir Engineering

Thick Beds, 8-in. (203-mm) Hole, Skin-Effect and Borehole Corrected,
Rx,-,/Rm = 20, DIT-E or Equivalent, Frequency = 20 kHz

40

20

El0
2

2 5
2

2

1
RIMPH/RIDPH

Rxo < Rt Frequency = 20 kHz, Rxo < ohm-m
2

1
B
2
0.7
?l
0.5
a
0.4
0.3

0.2
0.05 0.07 0.10 0.20 0.30 0.40 0.50 0.70
RIMPH/RIDPH

Rint - llb

Flgure 5-79e. Invasion correction chart for the phasor dual induction-
spherically focused log combination for Rxo/Rm = 20 [199].