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Legacy Wells and CCS

  • 21 - 24 September 2026
  • Online Live Stream | 13:00 CEST – 17:00 CEST
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Legacy Wells and CCS

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Fully online

All sessions of this unique course online

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Available via mobile, tablet or laptop

Course description

This 4-half day workshop focuses on assessing and managing risk of legacy wells in CCUS (carbon capture, utilization and storage) projects. Legacy wells are those that have already been abandoned, often in compliance with outdated regulations and standards, and find themselves in the path of the CO2 plume – or are exposed to higher pressure. These wells are considered by many the riskiest element of a storage project and an explicit decision has to be taken with each of them: we can re-enter and repair them (at least on land); we can monitor them and manage small leaks, if any; or we must renounce to an often promising storage site. The fourth choice, taking the risk of an uncontrolled, large leak that can become a showstopper, can spell disaster for the specific project and the whole carbon storage industry.

Selecting the best option needs a clear, consistent, and transparent methodology to assess whether legacy wells present an unacceptable risk, and to prepare a sound plan to repair or manage their leakage risk.

We will discuss in detail why and how much abandoned wells leak, and how we can prevent and mitigate the risk of integrity failure. It is now clear how rocks, together with cement, provide the ultimate containment guarantee: how do we characterize this mixed barrier at the basin level, and when are well data really too little to decide?

The workshop is specially designed for professionals facing the challenge of abandoned wells in CCUS projects, who are encouraged to bring some of their challenges along so we can apply together the techniques and methods discussed in class.

All practitioners facing wells that have already been abandoned, and those looking at futureproofing currently active wells are also welcome to attend, as well as anybody from government and non-governmental organization wishing to understand the risk of legacy wells.

The seminar is interactive, participative and hands-on, supported by real life examples and case studies; its open and relaxed atmosphere provides significant opportunities to network and exchange experience with peers and to start finding answers to actual challenges in a collaborative setting.

meet the training leader
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Matteo Loizzo
Well Integrity Consultant
Germany
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Brochure

Reveal the full schedule of the training as well as key topics, course objectives, key takeaways, special features, and the trainer bio!

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Legacy Wells and CCS Training Course organized by Fleming_agenda cover
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Benefits of attending

  • EXPLAIN CCUS projects’ structure
  • EXAMINE the behavior of CO2, on surface and in the reservoir
  • APPRAISE limitation of current abandonment standards and design leak-free well decommissioning
  • CLASSIFY aging processes of cement, steel, and rock when exposed to CO2
  • MAKE peace with Portland cement
  • EXAMINE the failure modes of wells
  • DESIGN an effective monitoring program
  • REALIZE why geology is a dominant factor in cement performance
  • ASSESS the benefits of different technologies and materials to select cost-effective solutions

Testimonials

Good training session with an experienced consultant who shares his insights and industry knowledge in his delivery.
Skandar GandiGlobal Segment Lead CCS, Weatherford, UK
The event was very productive as a lot of first hand information was presented, while also having several levels of skills within the room, providing several backgrounds to enhance the discussions and topics. Matteo offered a great scope for discussion while bringing new learning to my professional career. There were many items which I had no full awareness of so it has provided great value for my career and current role.
Luis ArteagaGlobal Operations Supervisor, Expro, UK
Very knowledgeable and experienced trainer, the course was full of real-life examples and information that I can use in my day-to-day work. I also appreciated the open discussions with the trainer and other participants throughout the course.
Anne WesthuesGeoscientist, DEEP.KBB, Germany
Matteo brought his field experience and expertise on well integrity into the course in a very practical and effective manner - well done!
Rich ChalaturnykEngineer and Professor, GeoVer Inc. and University of Alberta, Canada
Thank you for an informative and interesting training course. There were a lot of good discussions and material of good quality was presented. I am pleased with the trainer who seemed to have a lot of knowledge about the subject, and he was good at engaging the audience.
Anne Marte FaugstadDrilling Engineer, MOL, Norway
Matteo's knowledge, experience and explanation in all topics and discussions during the course was second to none, it made the amount of information gathered over the duration of the course a lot easier to understand and process.
Jack StrachanTechnical Tool Specialist, Archer Oiltools, UAE
Matteo has a lot of experience and knows how to pass the knowledge in a clear and simple way. We had some good discussions on well integrity, the most important international standards and also relevant practices in P&A operations.
Jessica Costa MouraWell Engineer, Petrogal, Brazil
It was nice to meet and listen to Matteo who has huge experience in the domain and can illustrate with many case studies. This pragmatic approach was much appreciated.
Regis StuderDrilling Engineering Manager, Drillscan Europe, France
Overall I thought the course was great. I did get tons of useful experience from the course and Matteo as the instructor was great.
Marko MilanovicPrincipal Completion Engineer, NTC NIS – Naftagas LLC, Serbia
Interesting discussions with the trainer and delegates. The training was productive for a better well integrity understanding. I learned a lot about the best practices.
Vladimir Perrin, Drilling Completion Engineer, Seaowl Energy Group, France
Matteo was excellent trainer with a lot knowledge that shines through in the sessions he delivered.
Anders JacobsenOperations and Sales Engineer, Archer Oil Tools, Norway
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Contact us

Anna Taylor | Marketing Manager | Fleming
Linkedin
Anna Taylor
Sr. Manager for Energy & HSE
Phone: +421 257 272 100
Email: event.inquiries@fleming.events

FAQs – Legacy Wells and CCS

This training helps participants build a clearer methodology for assessing abandoned wells, leakage risk, repair options, monitoring needs, and site decisions. It is designed for teams that need practical confidence when legacy wells sit in the path of a CO₂ plume or face higher pressure.
 

Participants examine qualitative and quantitative risk assessment, uncertainty, criticality, impact monitoring, mitigation, and real CCS case studies. The focus is on helping project teams manage legacy well risk in a transparent, consistent, and defensible wa

Yes. The agenda covers P&A, barrier qualification, abandonment standards, eternal barrier elements, MSAD, and the limits of current decommissioning approaches. Participants gain practical context for risk-based abandonment planning and leak-free well decommissioning in CO₂ storage environments.
 
Participants explore Measurement, Monitoring and Validation, wide-area monitoring, monitoring through wells versus monitoring wells, pressure testing, cased-hole logging, sonic and CBL, ultrasonic imaging, and future logging techniques. The aim is to support stronger monitoring programmes for containment assurance.
 

Participants explore Measurement, Monitoring and Validation, wide-area monitoring, monitoring through wells versus monitoring wells, pressure testing, cased-hole logging, sonic and CBL, ultrasonic imaging, and future logging techniques. The aim is to support stronger monitoring programmes for containment assurance.

The course introduces key references including NORSOK D-010, OEUK WDG, ISO 16530, OEUK decommissioning guidance for CO₂, and EPA UIC Class VI wells. These are connected to barrier design, abandonment decisions, risk control, and regulatory expectations for CCS wells.

Yes. The course is built around the practical choices facing CCS teams: re-enter and repair, monitor and manage small leaks, or reconsider a promising storage site. It helps participants apply clearer decision-making to wells with limited data and uncertain leakage risk.

The workshop is relevant for practitioners dealing with already abandoned wells and those looking to futureproof currently active wells. It connects CO₂ behaviour, well materials, barriers, geology, monitoring, and risk assessment so teams can better understand long-term integrity challenges.
 

The agenda covers CO₂ interaction with cement, steel, and rock, cement plug failure modes, microannuli, creeping formations, rock failure modes, and well barrier failures. This gives participants a practical view of the materials and structures that influence subsurface containment.

The course is designed for well integrity engineers, drilling and completions teams, reservoir and subsurface engineers, CCS/CCUS project teams, CO₂ storage specialists, asset integrity professionals, corrosion engineers, process safety teams, regulators, environmental risk managers, and energy transition project managers.

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