1300 would be about the top end for a years flying on the North Sea.
If you look on G-INFO you can calculate the average hours for a UK aircraft. I doubt the Norwegians are any different.
GINFO Search Results Summary
Further to this it seems to me that there is a lack of understanding about the terminology.
As an example from above
"17. of January this was changed to a new unit. According to reports in the media.
At time of accident this unit had 1300 flying hours ".
1300 since new, since overhaul or since repair? Without knowing which, the figure means nothing.
The way components are tracked on aircraft can mean that a component that has 5000 hours consists of the data plate and the log book with every other item being replaced and therefore having lower hours. Without sight of the log cards you cant tell a thing.