RE: No nice surprise11 Sep 2019 11:31
everhopeful,
to be fair to the Canadian company who designed and fabricated the PFs, they can only work with the data they are given by the customer at the time.
Some of that data will be solid and some might just be "best guess at the moment".
Expected volumes / proportions of Gas, for example, is one which is always a bit iffy and the fabricator, usually with customer agreement, will always build-in some capacity for dealing with volumes / flows outwith the contracted parameters.
As the PF gets used and experience gained with the throughput, various valve & flow / instrumentation settings will need adjusting; likewise, some pipework will be found to be smaller than required and will need replacing.
Dealing with completely unexpected volumes / proportions of another fluid, such as water or drilling muds, will require more significant plantg changes (driling muds are dealt with as a matter of course during the actual drilling & flow testing but other units, which are not part of any subsequent PF, are used for this).
PF generally have no built-in capability to handle any significant volumes / proportions of water - yes they can be desgned and built to do so, but the GKP PFs were built to handle oil and associated gas, with almost no water separation plant incorporated.
GKP produced a To-Do List some time ago which listed many plant items that required improvement or debottlenecking; when I find it I'll post up some details.
To the best of my memory they planned to incoprporate a 3rd-Stage GOS to help deal with higher gas volumes and other fluids.
Arrogance is not in short supply here as you will have found.