Graham,the costs for STU per barrel include all overheads...

Graham,
the costs for STU per barrel include all overheads including head office costs,not just field expenses.
As production increases the unit costs will fall as the head office costs are set against a higher number of barrels. In addition, the costs associated with the unseasonal rain which set back production by 15,000 bls was included in the figures, and the jet pumps/Acrasia tie benefits/potential pipeline savings will come into play by around Xmas.
Don't think BPT reports in such a conservative manner as STU.
Cheers,TAS