3C Panel Discussion
3C Panel Discussion -
While leakage of CO2 is unlikely if a storage site has been carefully selected and managed properly, there is always a possibility that something could go wrong: wells could leak, undetected faults or fractures could act as fluid conduits, or overpressure during injection could damage the seal. Leakage from wells can be managed with existing oilfield technologies routinely applied in the oil and gas industry. The far more challenging issue arises when leakage occurs through faults or fractures, particularly where surveillance coverage and well control is limited. Under these circumstances, many questions arise:
- How soon could leakage be detected and what are the best methods?
- Could the incipient leakage be detected in advance of it actually occurring so that intervention methods can be implemented before leakage occurs?
- Can the leak be stopped?
- What are most effective methods for stopping leakage and how long will they take to work?
- Are the methods of containing leakage permanent, or do they need to be actively maintained?
- How much will it cost to mitigate and under what circumstances would a storage project need to be redeveloped or abandoned?
These questions are the subject of a study carried out by the CCP3, a Joint Industry Project focused on CO2 Capture and Storage. A comprehensive and quantitative assessment of a variety of options for intervention in the event of fault leakage were assessed, including termination of injection, hydraulic barriers, reactive geochemical barriers, and polymer sealants. This panel session will discuss the motivation and need for developing intervention options, the most promising options identified as part of this study, and next steps in the development and testing of these technologies.
Moderator: Nigel Jenvy, CCP Chair and BP
Sally Benson, Stanford University
Scott Imbus, Chevron
Jenny Durhan, Stanford University