Quantitative Risk Assessment of Fault Slip in Response to CO2 Injection in Hydrocarbon Reservoir
摘要
Fault slip potential analysis holds a significant relevance within the realm of carbon dioxide (CO2) sequestration, particularly in subsurface reservoir integrity and seismic risk mitigation. This abstract focuses on the quantitative risk assessment (QRA) to evaluate the likelihood of fault slip on identified faults due to injection-induced phenomena. Pore pressure will increase leading to the exploration of fault slip potential and its profound implications for secure storage of CO2 in geological formations. This study considered multiple geological factors and incorporated the uncertainties in Mohr–Coulomb criteria by integrating deterministic and probabilistic analysis that governs fault slip potential, ranging from fault geometries to pore pressure changes and stress distribution. Furthermore, this study emphasized the practical significance of comprehending fault slip potential, thereby facilitating informed decision-making for the sustainable implementation of CO2 sequestration practices. The outcomes comprise the probability distribution function and cumulative distribution function of pore pressure needed to trigger slip as a result of CO2 injection. Sensitivity analysis suggests the impact of each reservoir parameter and fault geometry over the fault slippage initiation. It serves as a call to action for multidisciplinary research and continual refinement of methodologies to comprehensively address fault slip potential within the carbon capture and storage framework.