Resilience to Potential CO2 Injection Induced Seismicity, Estimated from Historic Ground Motion Exposure
K. Hindriks (Shell Global Solutions International B.V.)
S. Oates (Shell Global Solutions International B.V.)
T. Kettlety (University of Oxford)
Evgeniia Martuganova (TU Delft - Applied Geophysics and Petrophysics)
D. Kuehn (Norsar)
V. Oye (Norsar)
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Abstract
North Sea subsurface structures provide prolific opportunities to reduce Europe’s carbon footprint through permanently storing emitted CO2. In this paper we present a methodology to estimate resilience of manmade facilities and environment to potential induced seismicity during injection operations, based on historically observed regionally seismicity. This enables a robust design of a well informed risk management system that provides confidence to stakeholders while properly recognizing and establishing the right level of resilience to seismic events.
The method is demonstrated by applying the assessment for offshore structures on the Norwegian shelf to address resilience to potential seismicity around the NorthernLights prospect. It appears that is likely an event with Moment Magnitude equal to 3.7 can be managed adequately. The method can be extension to other areas in the North Sea, such as the Dutch and UK sectors, and can also address for instance resilience of onshore domestic areas to offshore induced events.