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DECOMMISSIONING – EXPERIENCE FROM THE OIL & GAS INDUSTRY

BOUDEWIJN VERSLUIJS – COMMERCIAL MANAGER DECOMMISSIONING

WINDDAYS - ROTTERDAM

14 JUNE 2018

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I AM NOT AN OFFSHORE WIND EXPERT…

YOU ARE!

DISCLAIMER

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DECOMMISSIONING

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DECOMMISSIONING

Fixed platforms(topsides and jackets)

Subsea infrastructure, including pipelines, risers, spools & wellhead frames

Floating(FPSO’s, turret buoys, mid water arches,

flowlines, etc.)

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DECOMMISSIONING

Engineering, Preparation, Removal and Disposal (EPRD) Contractor

Focus on safety and reduction of environmental impact

Highly skilled professionals - wide range of disciplines In-house expertise – Engineering Disciplines

− Environmental and geotechnical− Marine and structural engineering− Project management and procurement− Subcontracting and partnering

Floating and subsea assets Cost-effective solutions

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DECOMMISSIONINGTYPICAL FLEET

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DECOMMISSIONINGTYPICAL TOOLS

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Engineering, preparation, removal & disposal Total 19 redundant offshore production

platforms Works include:

− Preparation works on relatively small working areas

− Management simultaneous operations (SIMOPS) − Removal larger platforms in multiple lifts− Removal smaller satellites in single lift− Transport to designated dismantling & disposal

yard

DECOMMISSIONINGCURRENT PROJECTS

VIKING & VULCAN AND VIKING BRAVO DECOMMISSIONING, SOUTHERN NORTH SEA, UK

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DECOMMISSIONINGCURRENT PROJECTS

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Engineering, preparation, removal (& disposal) Total 3 redundant offshore production

platforms Works include:

− Project Management & Engineering− Preparation works, including separation of

topside modules− Design of grillage & seafastening for transport all

topside modules and jackets in 1 single transport− Transport to designated dismantling & disposal

yard

DECOMMISSIONINGCURRENT PROJECTS

L10B, L10C & L10G DECOMMISSIONING, SOUTHERN NORTH SEA, THE NETHERLANDS

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Perenco – Thames 49/28A, SNS UK, 2016-2017Removal 3 bridge linked platforms incl engineering, preperationcutting, airlifting and onshore disposal

Shell/NAM – Leman BH, SNS UK, 2017Removal of Topside and Jacket incl engineering cutting, airlifting and onshore disposal

Perenco – Welland, SNS UK, 2015Removal of three subsea templates, incl engineering and preparatory works

Wintershall - Q8-A & B, SNS NL, 2012Platform removal, incl survey, cutting, lifting, transport / de-installation and onshore disposal of two jackets & topsides

NAM / SHELL - L13-FH, SNS NL, 2011Subsea template removal, incl engineering and preparatory works

Wintershall - P14A, SNS NL, 2008Platform removal, incl survey, cutting, lifting, transport / de-installation & onshore disposal of jacket & topside

Wintershall – K10-V, SNS NL, 2004Removal of jacket and topside, incl engineering and preparatory works

DECOMMISSIONINGPREVIOUS PROJECTS

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OFFSHORE WIND DECOMMISSIONING PROJECTS

Yttre Stengrund, Sweden – 5 WTGs

Vindeby, Denmark – 11 WTGs

Utgrunden, Sweden – 7 WTGs

Hywind, Norway – 1 WTG (postponed)

What’s next?

− Larger scale projects like Horns Rev, Middelgrunden?

SMALL SCALE TEST PROJECTS

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SIMILARITIES O&G DECOMMISSIONING & OFW DECOMMISSIONING - JACKETS

Q8A/B DECOMMISSIONING - 2012 ABERDEEN OWF INSTALLATION - 2018

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SIMILARITIES O&G DECOMMISSIONING & OFW DECOMMISSIONING - TOPSIDES

SHERINGHAM SHOAL OSS INSTALLATION - 2010LEMAN BH DECOMMISSIONING - 2017

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SIMILARITIES O&G DECOMMISSIONING & OFW DECOMMISSIONING - MONOPILES

VARG A DECOMMISSIONING STUDY/TENDER - 2017WEST OF DUDDON SANDS INSTALLATION - 2013

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SIMILARITIES O&G DECOMMISSIONING & OFW DECOMMISSIONING - HVDC

REVERSED FLOATOVER HVDC – 20XX??SYLWIN FLOATOVER INSTALLATION - 2014

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ONSHORE RECYCLING AND DISPOSAL

THANK YOU JOHAN TOP!

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LESSONS LEARNED

Large execution window is beneficial (Availability of assets vs execution window have an impact on price)

Drawings/information provided may not represent actual situation (e.g. weights, marine growth, grout, etc.)

Structural integrity / suitability lifting operations

Soil plugs / grout in piles

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DECOMMISSIONINGNEW HORIZONS

THANK YOU / QUESTIONS?