Page 234 - The Geological Interpretation of Well Logs

- THE GROLOGICAL INTERPRETATION OF WELL LOGS -

It is certain that some hindrance to the wider use of The active introduction of new imaging tools and
image logs lies in their commercial side. To interpret the refinements of tools already in service continues rapidly
image jogs satisfactorily, a workstation must be used. It is (see Chapter 16). At present, imaging tools are consid-
only when workstations are generally available and ered as ‘specialist’, and only occasionally requested. This
enough minds are put to the subject, that image log analy- will change. They will soon become if not routine, then at
sis and interpretation will become properly developed a minimum, essential.
and properly used.

CBTL AMPLITUDES CHIL TRANSIT TIMES
360° Acoustic caliper AMP? USEC
150 140 460
(grid = borehole reference) ©
N S6m

96m

“

depth 98.7m
37m
a
Breakouts
Figure 13.33 Breakout indicated on acoustic images. The 360° caliper (from depth 96.7m) shows the breakouts oriented
approximately NW-SE. The amplitude image shows the breakouts as dark, vertical strips (arrowed). The transit time image shows
them as well-marked light stripes (arrowed). a and b are additional vertical features. Western Atlas CBIL, IMAGEPRO output,

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