Almost all countries have committed to meeting the environmental goals of the Paris Agreement. One of the ways to achieve targets is Carbon Capture, Utilization, and Storage (CCUS): this requires the identification of reservoirs capable of long-term sequestration.
If we are to store captured CO2 in depleted oil and gas reservoirs utilizing legacy wells, we will need to evaluate and address well integrity issues of these wells. This includes the determination if legacy wells are suitable to be re-used for CCUS or if plug and abandonment is the better option. Plug and abandonment (P&A) techniques have improved considerably over the years, but some wells may have not been plugged correctly the first time to allow them to withstand re-pressurization with CO2, this is especially true for old exploration wells. Considerations for cost of land versus offshore wells is also a contributing factor for project decisions.
Why worry? Can’t we just ignore legacy wells? Are wells drilled specifically for CCUS intrinsically safer? How can we make sure they are?
This webinar will look at the peculiarities of CO2, from the Joule-Thomson effect to the injectivity gap, and how the injected stream reacts with well materials (steel, cement, rock) in the long and short term. Must I use CO2-resistant cement? Is wet CO2 corrosion so bad? (Spoiler: no and yes).
We will also review how the peculiar behavior and the design constraints affect a well’s conceptual basis of design and critical scenarios, with an emphasis on barrier performance requirement and qualification.
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Course Chapters
- 1Designing Wells for Carbon Storage – Well Integrity: A Friend, Not A Foe - Chapter 1Media Type: Video
Credits
Earn credits by completing this course0.15 CEU credit1.5 PDH creditsSpeakers
years. His previous career with Schlumberger spanned field operations, research & development,
QHSE and carbon dioxide geological storage (CCUS). His current research interests include
harnessing creeping formations (such as salt and shales) to help control well leaks, modeling
leaks through cement, inverting geophysical measurements and quantifying methane emissions
from oil & gas wells. He also provides technical training in the field of CCUS, plug &
abandonment, well integrity, management systems, and process safety.
Matteo holds an Master’s degree in aerospace engineering from Rome university “La Sapienza”,
Italy, has authored or coauthored 31 technical papers as well as a book chapter on CO2 storage,
and he’s the Program Chair of the SPE Well Integrity Technical Section.
