SEPARATION STATION : CAPITAL COST ESTIMATE

[mrspcs]

For a preliminary cost assesment/comparison of surface facilities, I need to estimate the capital cost for a SEPARATION STATION (e.g. total equipment cost without installation as this could vary depending on location, accessibility, transport costs etc).
The estimate does not include the tank farm and utilities, those costs will be calc. separately.
Is there anything like an INDEX or COST FACTOR to estimate this ??
Perhaps based on Production Flow volume and characteristics ??
The basis could be something like:
Total flow from 12 wells: 20 MBPD
Oil Vol.: 21 % (approx. 4200 BPD)
Gas Vol.: 1.75 % (approx. 350 BPD)
Water Vol.: 77.36 % (approx. 15,472 BPD)

For this estimate I need better than "order of magnitude" accuracy but a +/- 20 % could be acceptable for this initial assesment.

Suggestions, ideas etc. on how to arrive at a reasonably acceptable figure will be very welcomed. Thanks in advance to all,
mrspcs

 

[BoRiS99]

Wow this is a tough question. It is a bit like asking how long a string is. Since the equipment varies so much depending on type of oil (8 API bitumen or Brent Crude), recovery method (primary production, SAGD, fireflood etc), location (pick a country and level of remoteness) I don't think an order of magnitude number is even possible with this much information.

 

[stewbaby]

Better hire an engineering firm for around $100,000 or so to get in the 20% range. May can talk to peers and find a similiar installed facility and us its cost plus inflation.

 

[1969grad]

If you have costs for existing facilities then the 15 minute estimate is to take the facility capacity ratio to the 0.7 power and multiply it times the known costs to get the cost of the new facility.

For an order of magnitude cost estimate I would get budget estimates for the major equipment like the separators. Then use factors on the cost of the major equipment to estimate the cost of piping, concrete, electrical, paint, etc.

Typical factors can be found in Process Plant Estimating Evaluation and Control by Guthrie.

To get a really accurate estimate you will have to have detail drawings and make a take-off of all materials and then get quotes.

The bottom line is that the more time you spend making the estimate then the more accurate it will be.

 

[MortenA]

as 1969grad says:

For a +/- 20% cost estimation you need:

P&ID's
Main eq. data sheets
Main utility data sheets
Main piping ISO's
Main utility piping ISO's
Main energy balance
plot plans and major civil engineering

In short its a pretty big project.

As economists (book keepers) has taken over management more and more often yous ee some pretty unrealistic approaches to cost estimates and the work needed to make them.

I will second the advice to "seek professional help" ;-)

Best regards

Morten

 

[jmw]

Isn't it these costs that are behind the success of the multi-phase meters?