Subsea Light Well Intervention Light Well Intervention World

Subsea Light Well Intervention

Light Well Intervention World wide there are more than 6000 SS wells, and the number is growing. The recovery rate from SS wells is most often less than 40 % vs 50 – 60 % on dry wells. Increased Oils Recovery from SS wells by use of Light Well Intervention Vessels is extremely cost effective vs Semi Submersible Rigs.

Strong growth in subsea wells drives demand for subsea services from advanced and versatile offshore vessels Development in global subsea wells Global subsea wells by customer (2014 -2017) 679 700 650 618 583 600 550 500 638 519 462 450 530 500 450 400 452 432 350 416 400 374 350 318 300 311 250 300 250 200 150 206 150 139 134 100 124 90 100 64 58 58 EN I Exxo n Mobil Premie r Oil 50 50 0 0 200 6 200 7 200 8 200 9 201 0 Exploration Drilling Top hole drilling 201 1 201 2 2013 2014 2015 2016 2017 e e e Installation & Construction Subsea & IMR Source: Quest Offshore Resources Inc. (November 2013) Petrobra Statoi s l BP Production IOR and IMR Shel l Tota l Chevro Anadark n o Decommissioning Plug & Abandonment

Ageing Subsea fields need well intervention and maintenance Average of producing subsea wells Subsea wells producing for more than 5 years 5, 000 NWECS 1: 11. 8 years +9% 4, 500 4, 000 3, 500 3, 000 2, 500 2, 000 North America: 8. 9 years 1, 500 1, 000 West Africa: 6. 1 years South East Asia: 11. 2 years 500 0 Brazil: 11. 2 years Exploration Drilling Top hole drilling Source: Infield, 2014; Infield, 2013 1) Northwest Europe Continental Shelf 201 2 Installation & Construction Subsea & IMR 2013 e Production IOR and IMR 2014 e 2015 e 2016 e Decommissioning Plug & Abandonment

Background • FMC`s Subsea Lubricator used on Regalia in 2003. 3 successful interventions • Island Frontier delivered in 2004 • Alliance between Island Offshore, FMC and Aker established in 2004 • 2005 § Performed Well Intervention on Chevron Stathspey project § Awarded the long term contact with Statoil (6+3 years) § Intervention on two Nexen UK Wells • 2006 awarded the BP contract 3 + 2 years for West of Shetland primarily, commencing May 2009

The Vessels Island Frontier Island Constructor Island Wellserver Island Performer

Wireline Services Most common RLWI services • Well integrity • Caliper logging of wells • Data collection (oil, water, gas) • Mechanical repairs (e. g. DHSV replacement) • Water shut off (plug setting) • Zonal isolation (plug or straddle) • Perforation - Re-perforation

Wireline Services Most common RLWI services • Mechanical scale removal (milling) • Mechanical hydrate removal (milling) • X-mas tree interventions • Tubing cutting –explosive or mechanical cutting • Sand or debris removal • Honing and refurbishing of seal areas • Manipulation of sleeves and side pocket mandrels

Challenging work Vigdis C-5 Well Installation of Straddle to Isolate a non producing zone • 280 m water depth • Straddle length 53 m • Well bore length 3850 m • Depth at end of well 2250 m • Horizontal climb 117 deg. • Duration of job 45 days

Track Record • More than 270 Light Well Interventions since 2005 • More than 95 % of the jobs were successful • Jobs lasting 10 – 45 days • Increased revenues for clients – billions

Main focus from Authorities (PSA & NMD) To maintain barriers in every form • Pressure control • Technical barriers • Human barriers • System barriers Security • Integrity

Division of Responsibility • Client takes over responsibility when the tool-string enters the well • IO resumes responsibility when the tool-string leaves the well • Client is responsible for all cost related to damage to the well • Client is responsible for all cost related to blow-outs or similar accidents • All except for gross misconduct

People The LWI-segment employs more than 400 people in Island Offshore • All recruited internally • Operating as vessels • Focus on cross-training and multiskilling • Retention rate 95 % • High level of competence • First class safety records • Shore staff with engineering support

The future

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