Integrated Carbon Risk Assessment (ICARAS)

Abstract In this paper an integrated workflow is described for risk assessment within CCS. IFPEN, SINTEF and TNO joined forces to define a comprehensive and transparent risk assessment methodology. The tools developed in these institutes are thereby integrated. The workflow can be applied to proposed carbon storage sites. Starting with a qualitative analysis and scenario definition potential risky scenarios are defined. These are subsequently investigated in a quantitative way, either by so-called fast models or by fully developed numerical codes. The scenario analysis includes modelling of the reservoir and caprock behaviour, well integrity evaluation and migration path analysis. The important item of sensitivity analysis is addressed by probabilistic means. Finally, the consequences of potential surface leakage are addressed in this suite, resulting in a clear picture of the risks at a specific site/time. The presented methodology is tested on a real offshore gas field.