The document reviews OPTV data collected from a well on April 20, 2010 to check the status of the well's deviation and verticality after having issues pushing and pulling rods at a depth of 202m. It finds that the steel casing ends around 34.9m, there is a possible major fracture around 43.4m, and at 174.5m the well deviation is 10.6 degrees or 12m off vertical. The conclusion is that the well's lack of verticality may be contributing to the difficulty operating the rods deeper than 175m.

1. Review of OPTV data collected@SK201
on Apr. 20th
2010

2. OBJECTIVE
To check on status of well (i.e deviation/verticality)
after difficulty in pushing/pulling rods at depth of
202m.

3. BACKGROUND
The well has been caliper logged :
1. On 16/04/10 – For PVC installation purposes

4. 1. Depth: 34.9m
Both OPTV data shows possible end of steel casing
in a somewhat iron-rich water while CALP data
confirms the casing depth
Slide #5: Down-hole OPTV data from 20/4/10
Slide #6: Up-hole OPTV data from 20/4/10
Slide #7: CALP data from 16/4/10

5. End of
steel
case
Over-exposed image of open hole well
Magnetic interference
in steel casing
causing distorted
image
Well’s deviation in degree

6. End of
steel
case
Balanced image of open hole well
Well’s deviation in degree

7. End of steel casing ~34.9m
Possible bad data
Open-hole well

8. 2. Depth: ~43.4m
OPTV and CALP data shows possible major fracture
max. diameter of 340mm(~13”). Deviation is @2.4
degree
Slide #9: OPTV data from 20/4/10
Slide #10: CALP data from 16/4/10

9. Possible major fracture
Well’s deviation
@2.4degree

10. Possible major fracture as
seen on OPTV

11. 3. Depth: 174.5m
OPTV data shows major sequence of schist with
well deviation @10.6 degree or 12m as calculated
Slide #12: Up-hole OPTV data from 20/4/10

12. Well’s
deviation

13. Conclusion:
The verticality of SK201 might be contributing to
the difficulty in penetrating further down the well
and pulling up the rods. At 175m, the well is 10.6
degree off which is about 12m in unit length.