mosaic oil weekly operations update

25 March 2008
ASX ANNOUNCEMENT
Mosaic Oil Weekly Operations Update – Surat-Bowen Basin, Qld
Fairymount-9 (PL 46 -MOS; 100%)
• Fairymount-9 was the first target and is the first successful well of the 2008 drilling
program
Mosaic Oil NL (ASX: MOS) advises that as at 25 March 2008, the Fairymount-9 oil development
well has been completed as a Showgrounds Sandstone oil producer.
Since the last report, the well was deepened from 2087 m to 2102 m for additional production rat
hole. The 5-1/2” production casing was set and cemented at 2098 m. The perforating guns and 2-
7/8” production tubing string were run and landed in readiness for perforating the sub-unit “B Sand”
from 2036 m to 2039 m.
The well has been secured and suspended awaiting a workover rig for the rod-insert pumping string
installation. Mosaic Oil is expected to have access to a workover rig in April-May 2008. Century
Rig 7 was released to Waggamba-4H on 24 March 2008.
As Fairymount-9 is the first well in the northern part of the field to have encountered the sub-unit
“B Sand”, Mosaic Oil has decided to complete this sub-unit and put it on production test first prior
to perforating the sub-unit “C Sand” from 2042 m to 2049 m and probably the sub-unit “A Sand”
from 2033 m to 2034 m. This is intended to provide additional data for maximising oil recovery and
reserves from the field.
Waggamba-4H (PL 202 - MOS; 50% gas, 65% free oil/condensate)
• CS Energy has pre-paid $3.5 million for funding
Century Rig 7 is being moved from Fairymount-9 to the Waggamba-4H site, with drilling expected
to commence by 31 March 2008.
CS Energy has pre-paid $3.5 million for funding the Waggamba-4H drilling, completion and tie-in
costs, and will be entitled to 50% of gas production and 35% of free oil and condensate production
from Waggamba-4H. Mosaic Oil will retain 50% of gas production and 65% of free oil and
condensate production.