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Keynote Speech - Technical Qualification of a Storage Site for Mongstad
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Fourth EAGE CO2 Geological Storage Workshop, Apr 2014, cp-389-00002
- ISBN: 978-90-73834-79-8
Abstract
In this presentation the technical assessments, challenges, work processes and risks in the qualification of the Johansen site will be described. The site has been qualified in accordance EU storage directive and capacity and safe storage has been documented. Failure to ensure and communicate safe storage will be a serious threat to implementation of CCS. Work processes and criteria for screening, storage site qualification and development planning was established. After a screening process with several storage alternatives, the Johansen Formation was selected and a qualification program performed. The effort was to evaluate the storage to a maximum with the available data and to reduce uncertainties. 3D seismic was acquired and integrated to a cube covering the storage complex area. A conceptual geological model was established and a large numerical model constructed. Potential communication channel was investigated and communicating pore volume estimated. Leakage scenarios were studied and leakage risk estimated. Cap rock integrity and and fault seal studies performed. An entire risk register was established with impact, mitigating action etc, which indicated acceptable risk for storing the Mongstad volumes. A key learning is that the work processes from the petroleum industry cannot just be copied; however, considerable adjustments are required.