sleipner gas condensate field

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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

    2 - Classification: Internal 2011-05-25

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    The Sleipner Field

    3 - Classification: Internal 2011-05-25

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    Sleipner Vest Field

    Phase 1HP production

    Phase 2LP Production

    Phase 3 - Pre-compressor modus

    Phase 4SLB compression Phase 52008 -------

    4 - Classification: Internal 2011-05-25

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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

    5 - Classification: Internal 2011-05-25

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    6 - Classification: Internal 2011-05-25

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    7 - Classification: Internal 2011-05-25

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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

    8 - Classification: Internal 2011-05-25

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    9 - Classification: Internal 2011-05-25

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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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    11 - Classification: Internal 2011-05-25

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    12 - Classification: Internal 2011-05-25

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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

    14 - Classification: Internal 2011-05-25

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    15 - Classification: Internal 2011-05-25

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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

    16 - Classification: Internal 2011-05-25

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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

    17 - Classification: Internal 2011-05-25

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    18 - Classification: Internal 2011-05-25

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    SLB Scrubber

    K-value

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    20 - Classification: Internal 2011-05-25

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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

    21 - Classification: Internal 2011-05-25

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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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    23 - Classification: Internal 2011-05-25

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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

    24 - Classification: Internal 2011-05-25

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    25 - Classification: Internal 2011-05-25

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