2015 ARKH-P3-Production Facilities
.pdf
ARKHANGELSK STATE TECHNICAL
UNIVERSITY
OFFSHORE FIELD DEVELOPMENT PROCESS,CONCEPTS
AND FACILITIES
OCT 2015
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PART 3: OIL & GAS PRODUCTION TREATMENT &FACILITIES
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Daniel Saincry
TABLE OF CONTENTSPART 3
WELL EFFLUENT
OIL TREATMENT
GAS TREATMENT
PRODUCTION WATER TREATMENT
2
OIL & GAS PRODUCTION SCHEME
Liquids 
Non-Associated
Gas
Gas Field
Gas
Water 
Associated Gas
Oil
Unsaturated Oil Field |
Oil |
|
|
|
Water |
Dome Gas
Associated Gas
Liquids
Oil
Gas
Saturated Oil Field |
Oil |
|
Water
3
3
COMPONENTS OF WELL EFFLUENTS
Inert gas : Nitrogen, Helium
Acid gas : H2S : Hydrogen sulphur, extremely corrosive and deadly CO2 : Carbon dioxide, corrosive
Hydrocarbons :
Light : C1 C2 C3 C4
Heavy: C5 . C6 . C7 … C10 ... C30 ...
( Paraffin, Naphtene, Aromatics, … )
Non Hydrocarbon components
Sulphur (mercaptans)
Nitrogen, Oxygen
Organo-metallic ( Asphaltene )
Water & Salt
Solids : Sand, Clay, Corrosion products ...
4
PRODUCTION OPERATIONS OBJECTIVES
To sell crude oil
To commercialize gas ...
(Long term contracts or spot sales..)
therefore :
Maximize hydrocarbons recovery from reservoir,
Meet required Export Specifications
Meet HSE objectives (Health, Safety & Environment)
Minimize Operating costs
Try to find synergies with other Production Facilities ...
5
THE PRODUCTION FLOW
Collection,
Treatment,
Storage,
Metering,
Export.
6
OIL & GAS TREATMENT
OIL
•Separation
•Stabilisation
•Dehydration
•H2S Removal ( stripping )
•Desalting
GAS
•Separation
•Condensate stabilization
•Sweetening ( H2S - CO2 )
•Dehydration
•Ethane,propane,butane recovery
7
OIL TREATMENT
8
OIL PRODUCTION FACILITIES SCHEME
|
HP gas |
MP gas |
LP gas |
Associated gas |
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facility |
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compressor |
compressor |
compressor |
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(treatment unit) |
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Gas |
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Cooling |
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scrubber |
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system |
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LLP flare |
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Degassing |
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drum |
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Separator 1 |
Separator 2 |
Separator 3 |
Separator 4 |
Storage |
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tank |
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Free |
Free |
Free |
RVP |
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water |
water |
water |
spec |
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Crude oil |
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Crude oil |
Cooler |
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Heater |
Free |
dehydration |
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production wells |
(recommended) |
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& desalting |
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(if required) |
water |
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9 |
TWO PHASE SEPARATOR
10