Page 70 - Basic Well Log Analysis for Geologist
P. 70
Sees we ren
RESISTIVITY LOGS
cece eee eee eee ne nee
Figure 20. Schematic illustration of a focused Laterolog* illustrating current flow.
Courtesy, Dresser Industries.
Copyright 1974, Dresser Atlas.
As cited in the example, A, (above) and A) (below) are the focusing (or guard) electrodes which direct and force the current
from the A, electrode into the formation. The monitoring electrodes (M, — M,' and M; — M3’) are brought to the same
potential by adjusting the current that emits from the focusing electrodes A, and A:.
