Page 208 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2
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Formation Evaluation 177
Antenna configuration
Borehole
Fluid
Backup
arm
Figure 5-104. Diagram showing antenna-transmitter configuration for an EPT
sonde and microwave ray paths through the mudcake and formation adjacent
to the borehole [214].
where Ac = Alog - 50 (5-111)
(A,o = EATT curve reading in dB/m)
?g is a function of formation temperature (T) and can be found from:
PfO
20( 710 - T/3)
Tpfo = (440- T/3) (5-1 12)
Tpm is taken from Table 5-28 and t$ is taken from a neutron-density log (I$~,,).
Equation 5-109 can be rearranged to find t$ for a quick-look comparison with
