Oman shut its oil exporting terminal at Mina al-Fahal for about two hours - it is open again now. The Omani Oil Ministry is reproting that the storm is weakening (as we see from the maps) and that oil drilling and refining activities are proceeding as usual. They expect some delays in crude exporting, but fewer than previously expected (unquantified).

The above all from Reuters headlines

From CNN -
'Oman's major oil installations, which were not directly in the projected path and nowhere near as extensive as those of its neighbors, continued operations but took precautions as Gonu approached.'

Interestingly, Mina al-Fahal is northeast of Muscat - and from all the imagery I can see, the storm hasn't even reached there. At least according to the information at https://metocph.nmci.navy.mil/jtwc/warnings/io0207web.txt

So it is good to see that the facility was shut down for two hours before a Cat 4/5 passed, and they are now confident enough to restore operations while the storm passes.

And from Wikipedia - http://en.wikipedia.org/wiki/Mina_al_Fahal

'Crude oil and refinery products are loaded on to tankers off Mina Al Fahal by subsea pipeline and SBM (Single Buoy Mooring) Systems.

We'll see what the storm surge does - after the storm actually arrives, that is. If I understand the Navy report, that should be in about 8 or so hours, though it is curving and no longer likely to hit Muscat directly.