Page 152 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2

Formation Evaluation 121

-
0 Resistivity of the zone
-
0 Resistivity of the water in the zone
-Water saturation in the zone

Adjacent Bed

ww

I Hole I 0 Schlumberger
Diameter

Figure 5-66. Diagram of the borehole environment showing the various
zones and their parameters [199].

D
+
T, = (TTD - Ts)---f T, (5-92)
DTD
where T, = formation temperature (OF)
T,, = temperature at total depth (BHT)("F)
Ts = average surface temperature (OF)
D, = formation depth (ft)
D,, = total depth (ft)