RE: AM September Arrival...13 Jul 2018 15:11
Ricfle,
"If this is the case, what would be the point of the AM turning up WoS at the beginning of Sept? Is this IJWT's point?"
Right off the bat, and to reassure you, I in no way profess to be an 'expert' in SURF installation, rock-dumping, and so on. However I am perfectly at ease with heavy oilfield engineering of many sorts, so think I may be able to answer your question.
By definition, SURF installation has to be completed before the FPSO can come in and hook up to the buoy. However, rock-dumping over the seabed flowlines is not, strictly speaking a part of SURF. The rocks are put in place to protect the flowlines from possible damage due to trawling, marine growth and erosion, etc.
The flowlines to be covered run along the seabed from the well / manifold location only for a certain distance. I don't know exacly what that distance is, but let's say for argument it's a couple of kilometers. After that, they join up with the flexible catenary flowlines rising from the seabed to the buoy.
The hookup to the buoy is conducted using a heavy winch wire which runs down through the centre of the turret and connects to the buoy. The wire is pulled in, raising the buoy into the turret, wherein it is then latched and secured. None of this requires 'outside assistance' (other than possibly a vessel with an ROV deployed to monitor the operation), and in regard to the flowlines, the only movement experienced takes place in the 'Ess-bends' of the flexible sections, without being transmitted to the static portion on the seabed.
For this reason, I don't see why the FPSO could not hook up to the buoy before rock-dumping has been completed.
This having been said, conducting such SIMOPS would be a complication which the company might rightly and wisely wish to avoid: it's easier and less risky to do things sequentially : one thing at a time.
However, all the dates we're looking at and quoted by Seafish and also the company documents aren't engraved in stone. They're 'windows'. The FPSO is set to leave Dubai sometime before the end of September: that's all we know for sure. The rock dumping should be completed by end of October, similarly. There's a six week sailing time for the FPSO. FPSO sailing at end September takes arrival to mid-October: dumping should be finished. An earlier sailing? Maybe the dumping will be advanced to accommodate an earlier arrival.
Or maybe not. Because maybe (if my thoughts above are correct), hookup can still take place while dumping is still ongoing but not yet completed.
We'll just have to wait and see. Which is why Shipwatching can be fun, and will become yet more exciting in the weeks to come.