Page 25 - Basic Well Log Analysis for Geologist

BASIC RELATIONSHIPS OF WELL LOG INTERPRETATION

STEP PROFILE

Borehole
Wall
LL

Ryo

dj
Distance ————>

TRANSITION PROFILE ANNULUS PROFILE

Borehole Borehole
Wall Wall

Rxo
S Rj 2
3 .
l ;
ir Ro ir 1

dj dj

Distance ———-——>> Distance ——————>>

Ro = resistivity of the zone with pores 100% filled with
formation water (Rw). Also called wet resistivity.