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1 - Classification: Internal 2011-05-25
Sleipner Gas Condensate Field
Field development Case Study
History, on-going cases and lessons learned
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The Sleipner Field
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The Sleipner Field
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Sleipner Vest Field
Phase 1HP production
Phase 2LP Production
Phase 3 - Pre-compressor modus
Phase 4SLB compression Phase 52008 -------
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Sleipner Vest - Phase 1 HP production
(1996)
Process limitations
Inlet separator at 105bar (high back-pressure for wells) and declining well
pressures
2 export compressors
PUDInstallation of a Compression platform at SLB in 2002
Further field development aim : Reduce back-pressure of wells and maximize
production at lowest possible investments
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Sleipner Vest - Phase 2 LP production
(2002)
Inlet separator at 85bar
Modifications based on studies and testing at lower operational pressure
Effect on CO2 removal, maintain gas and condensate spec
2 export compressors, compressor rebundling (increased head) Increased process cooling (new inlet cooler and new wet gas cooler)
Inlet separator modifications (New inlet cyclones, new double perforated
plate, new V-mesh, new mesh pad and outlet cyclones)
Scrubber modifications
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Separator internals- Sleipner T inlet separator
Good performance and no reported separation problems
Liquid load/dump rate from down stream vessels constant as inlet pressure hasbeen reduced and volume flow increased
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Sleipner Vest - Phase 3 Precompression
(2004)
Modified export compressor ACompress gas from inlet separator
Installed new precompressor scrubbers
Lay-out/area
Weight issues Selected Gasune compact scrubbers
Tie-in of Alfa Nord sub-sea wells
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SLT precompressor scrubberGasunie design
2x50% design
20MSm3/d/60barg
High k-Faktor (0,9)
ID=932mm
Good performance
and no compressor
problems.
Mechanical damage
on scrubber
internals
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Sleipner Vest - Phase 4 SLB compression
(2008)
New compression module on SLB (2008)
Inlet cooler, gas scrubber, compressor and condensate pumps.
El driven/VSD compressor ( approx 9 MW available el power)
Low k-value Compressor scrubber. Traditionally designed Normally not manned operation
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SLB Scrubber
K-value
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Sleipner Vest - Phase 5 2012 ---
Gear revamp on SLB compressor(2012)
Revamp of SLT precompresssor to allow 20barg inlet pressure (2014)
Revamp of SLT recompressor and modification of 2nd stage separator (2013-
2014)
Revamp of SLT export compressor (2014)
New tie-in candidates
Rerouting of Alfa Nord
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Sleipner EastField Development phases
Similar pressure development as SLVreduce back pressure of wells
Utilise existing equipment, modify and reroute piping as reservoir pressure drops
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Sleipner AField Development phases Phase 1
Both inlet separators operate at high pressure (approx 100barg)
Phase 2
Inlet separator A operate at high pressure (100barg)
Inlet separator B operate at low pressure (35barg), gas from inlet B is routed to
suction side of 2nd stage recompressor
Phase 3
Both inlet separators operated at low pressure (35barg). Gas from both separators
routed to suction side of 2nd stage recompressor
Phase 410 bar
Gas from inlet separator B routred to suction side of 1.st stage recompressor
- Inlet separator A at 35 bar, but wells on manifold A routed to B manifold via x-over
- Phase 5 Gudrun
- Gudrun on inletseparator A at 90 barg through processing train A
- Own production on inletseparator B at 10 barg
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