Robertsons Geologging-OPTV

1. Review of OPTV data
collected@KLT001P on Feb. 19th
2010

2. OBJECTIVE
To check on status of Johnson’s screen
installed in well and to decide the next
course of action from OPTV images

3. FIELD OPERATIONS
The OPTV sonde was lowered down-
hole inside the PVC casing until it hit
the bottom @38m. On the up-hole
run, tool’s covered with sticky clay/silt
resulting in no casing images recorded.

4. 8-in PVC casing
10-in steel casing
OPTV in well

5. Sticky clay/silt

6. OPTV Data - Downhole Run
1. Depth: 23.5m
OPTV encounters end of PVC casing
and the top of screen #1

7. 17.5m
PVC casing
screen

8. 2. Depth: 29.5m – Downhole Run
OPTV encounters end of screen#1 and
start of screen#2

9. Screen#1
Screen#2
joint

10. OPTV Data - Downhole Run
1. Depth: 35.5m
OPTV encounters end of screen#2 and
start of screen#3

11. Screen#2
joint
Screen#3

12. OPTV Data - Downhole Run
1. Depth: 37.8m
OPTV encounters screen#3 buried in
sticky clay/silt formation

13. Screen#3
Buried
(~3.7m)
screen#3

14. As Proposed Well Design
schematic
by consultant
Slide #15

15. 23m
43m
screen

16. Conclusion:
Based on the OPTV images acquired, it was
observed that the installed screen was buried
~3.7m in possible clay/silt formation @37.8m
though the expected bottom of well’s @41.5m.
Driller was instructed by consultant to continue
redeveloping the well.