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The Challenge of Well Integrity in a Subsea Environment

20 – 22 May 2014

Bergen, Norway | Clarion Hotel Bergen Airport

Technical Agenda

Tuesday, 20 May

Session 1 - Subsea Well Integrity Basis of Well Design

This session will provide an introduction for the subsea well integrity workshop along with some objectives. The focus will be on well integrity in the design phase, barrier definition and lifecycle expectations. What are the drivers to establish a successful subsea development, with reliability and minimum intervention? The topics covered in this session will be:

  • Managing well integrity and well design in a subsea environment
  • Definition of well barriers in a subsea well
  • Robust subsea well design
  • Subsea wellhead and xmas tree
  • An operators experience - design basis versus user experience


  • Gary Evans, Tullow Oil
    Managing Well Integrity and Well Design in a Subsea Environment
  • Tore Fjågesund, Wellbarrier
    Definition of Well Barriers in a Subsea Well
  • Johnny Gundersen, PSA
  • Anders Wormsen, FMC
    Wellhead System Design

Session 2 - Mitigating the Well Integrity Risk in Detailed Well Design

Early phase design and risk mitigation is vital in planning subsea wells to ensure the well’s longevity. Implementing design choices to boost the well’s safety performance, in addition to its financial robustness, should be scrutinised in the design phase. Throughout the lifetime of the subsea well, challenges could be met in terms of barrier integrity, annulus pressure monitoring and management, production optimisation and wellhead fatigue. When analysing and planning subsea wells, other sub-systems have a dramatic impact on the operational planning, such as swapping out the drilling rig. Therefore, there is a need to focus on system engineering aspects when planning to maintain the well’s longevity from a safety and production perspective.

Topics proposed to be covered include:

  • Outer Annulus Monitoring
  • Wellhead Fatigue Modeling
  • Casing Design and Monitoring Techniques
  • Reliability Based Completion Design
  • Artic Well Integrity Challenges


  • Hilde Brandanger Haga, Statoil
    B Annulus Monitoring
  • Simon Glover, Altus Well Experts
    Casing Design and Monitoring Techniques
  • Einar Molnes, Exprosoft
    Reliability Based Completion Design

Wednesday, 21 March

Session 3 – Risk Exposure and Lessons Learned

During the productive lifetime of wells, focus from a well integrity viewpoint should be on maintaining and monitoring the status of well barriers to ensure the wells are operating within acceptance criteria, reflecting risk and safe operating practices. A holistic approach should be taken to risk management, addressing not only the immediate risk of one or more failed barriers but also the risk related to mitigation. Key in understanding well integrity status and deciding on mitigations is:

  • Use of Relevant and Adequate Monitoring Techniques
  • Test Practices
  • Well Leakage diagnostics
  • Sharing of Lessons Learned from the Operate Phase


  • Stuart Girling, Girling and Company
    Risk Management of Well Barrier Failures, Mitigation and Repair
  • Paul Hopmans, Shell
    Subsea Well Operating Philosophy
  • Kent Aspnes, Statoil
  • Per Holand, Exprosoft
    Risk Based Leak Rate Acceptance Criteria for Subsea Wells

Session 4 – Plugging and Abandonment (P&A) Challenges

P&A operations are a key part of the well lifecycle process.   Well abandonment operations, particularly in the subsea environment, can be more complex to execute successfully than other operations during well construction and production.

Well integrity best practice requires abandonment to be considered during the planning phase of well construction and completion. Before P&A operations can be planned, an understanding of applicable regulations, standards, and practices is required. The session will address :

  • Current and Future Regulations
  • P&A strategies and Candidate Prioritisation
  • Ideas to Maximise the Efficiency of Well Abandonment Projects
  • Techniques that are Available for P&A
  • Methods and Innovations for Rig-Less P&A

Finally, a break-out session will be conducted to cover new technology – what equipment, materials, processes and innovations are needed to bridge the gaps to drive towards effective and safe completion of the well lifecycle in a subsea scenario?


  • Jules Schoenmakers, Shell
  • Steinar Strøm, Statoil
    Preparations for the ‘Big Boom’ in P&A Activities
  • Jim Bain, Schlumberger
    Evolutionary Technology to Reduce Well Abandonment Costs
  • Gunnar Lende, Halliburton
    Abandonment Technology
  • Stan Bird, OneSubSea

Thursday, 22 March

Session 5 – Well Integrity Challenges Way Forward

Well integrity as viewed by the legislator is a responsibility of the operator. Oil and Gas companies have their reputation and a responsibility to their shareholders but collaboration between the two parties is inevitable and important.  This session will address:

  1. Subsea well integrity challenges and expectations from a regulator perspective
  2. A collaboration example:
    • Accomplishments and advances in well integrity thru the WIF (Norwegian Well Integrity Forum)
    • OGP with ISO
  1. Inspiration from other industries to improve well integrity

This session will identify the well integrity gaps and build on the journey of collaboration that has already started. Identify solutions in joint effort with oil and gas operators and regulators to define the challenges and suggest a road map for the future.


  • Michelle Monteau, Well Integrity Forum
    Accomplishments and Advances in Well Integrity through the WIF
  • Paul Hopmans, Shell
    Collaboration with OGP and ISO
  • Birgit Vignes, ConocoPhillips
    Well Integrity Portal - Real time Integrity Management