Sorry for the late reply, I have been experimenting. :-)
I have loaded about one third of the papers and I used the series and series-index fields to keep the paper number. Just a few question:
1) I wanted to keep the leading zeros, but Calibre deleted them is there a way to do this?
2) After the load the Published date field contained the current date and not the date from the PDF. Any suggestions.
3) I was thinking of using the "Search Internet" plugin to load the Abstracts, DOI number etc from the OnePetro website
But I have not got it work. I do know that I need the leading zeros though. What I would like to do is just right click select OnePetro and load the information. Any pointers on this would be really appreciated.