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1. Well Diagnosis with Production
Logging

2. Outline
• Abnormally low productivity
• Excessive gas or water production
• Well treatment evaluation
• Injection well diagnosis

3. Temperature
and spinner
flowmeter are
used for
deriving flow
profile.

4. Excessive gas
production can
be due to gas
channeling or
casing leak.

5. Excessive water
production can
be due to water
channeling or
casing leak.

6. Temperature
and noise logs
can identify gas
channeling.

7. Early water
breakthrough in
high-perm
layers causes
excessive water
production in
water flooding
projects.

8. Early gas
breakthrough in high-
perm layers causes
excessive gas
production in gas
flooding projects.

9. Temperature
and fluid
density logs
can be used
to locate gas
entry.

10. Water coning
causes
excessive
water
production.
Water
production is
rate sensitive.

11. Gas coning
causes
excessive
gas
production.
Gas
production is
rate sensitive.

12. Temperature
logs can be
used to
evaluate
fracturing
jobs.

13. Gamma-Ray
log can also
be used to
evaluate
fracturing
jobs.

14. Noise and
temperature
log can be
used to
identify
abnormally
high injection
rate.
The separation
implies water
injection.