2011-08-04_HYDROLOGY - P2008046

• Permit No: P2008046
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/4/2011
• Doc Name: Pad cement evaluation
• From: American Shale Oil, LLC
• To: DRMS
• Email Name: THM
• Email Name: DB2
• Media Type: D
• Archive: No

Mr. Travis Marshall
Mr. Kent Walter
Ms. Wendy Cheung
Page 3 of 6
TM -1 (Attachment B)
CAST -F log completed: June 27, 2011
Casing Depth: 1,976 ft bgs
Interval Logged: 26 —1,976 ft bgs
The ACE report prepared by Halliburton indicates the cement to pipe bond is adequate from the bottom of
the log (1,976 ft bgs; top of the R1) to the lower Uinta Formation (396 ft bgs); the bond is rated as good
through the entire interval. The bond is rated as poor from the lower Uinta Formation 396 ft bgs to the top
of the logged interval (26 ft bgs).
TM -2 (Attachment C)
CAST -M log completed: May 5, 2011
Casing Depth: 2,290 ft bgs
Interval Logged: 46 — 2,243 ft bgs
The ACE report prepared by Halliburton indicates the cement to pipe bond is adequate from the bottom of
the log (2,243 ft bgs; upper RO) to the middle of the Uinta Formation (310 ft bgs). The bond is rated as
fair from the bottom of the log (upper RO) to lower Uinta Formation (358 ft bgs), good through the
middle of the Uinta Formation (358 — 310 ft bgs), and poor within the upper Uinta Formation (310 ft bgs
to the top of the logged interval [46 ft bgs]).
TM -3 (Attachment D)
CAST -M log completed: May 5, 2011
Casing Depth: 2,215 ft bgs
Interval Logged: 46 — 2,098 ft bgs
The ACE report prepared by Halliburton indicates the cement to pipe bond is adequate from the bottom of
the log (2,098 ft bgs; lower R1) to near the top of the R8 (566 ft bgs). The bond is rated as good from the
bottom of the log (lower R1) to near the top of the R8 zone (566 ft bgs) and poor to adequate from the top
of the R8 (566 ft bgs) through the Uinta Formation to the top of the logged interval (46 ft bgs).
TM -4 (Attachment E)
CAST -M log completed: April 10, 2011
Casing Depth: 1,907 ft bgs
Interval Logged: 46 — 1,827 ft bgs
As previously discussed cement was not observed at the ground surface during cementing operations at
TM -4. An attempt was made to cement the outside of the casing from the surface to correct the
deficiency. The volume of cement added was approximately equivalent to 230 feet of annulus space. The
CAST -M log was performed following the attempt to cement from the surface.
The ACE report prepared by Halliburton indicates the cement to pipe bond is adequate from the bottom of
the log (2,098 ft bgs; lower R3) to the upper R8 (696 ft bgs). The report indicates that the top of cement is
approximately 700 ft bgs. The bond is rated as good from the bottom of the log (lower R3) to the middle
of the R4 (1,644 ft bgs), fair from the middle of the R4 (1,644 ft bgs) to the upper R8 (696 ft bgs), and