Modeling-Based Assessment of Deep Seismic Potential Induced by Geologic Carbon Storage

Author:

Chang Kyung Won1ORCID,Yoon Hongkyu2

Affiliation:

1. 1Geotechnology & Engineering Department, Sandia National Laboratories, Albuquerque, New Mexico, U.S.A.

2. 2Geomechanics Department, Sandia National Laboratories, Albuquerque, New Mexico, U.S.A.

Abstract

Abstract Induced seismicity is an inherent risk associated with geologic carbon storage (GCS) in deep rock formations that could contain undetected faults prone to failure. Modeling-based risk assessment has been implemented to quantify the potential of injection-induced seismicity, but typically simplified multiscale geologic features or neglected multiphysics coupled mechanisms because of the uncertainty in field data and computational cost of field-scale simulations, which may limit the reliable prediction of seismic hazard caused by industrial-scale CO2 storage. The degree of lateral continuity of the stratigraphic interbedding below the reservoir and depth-dependent fault permeability can enhance or inhibit pore-pressure diffusion and corresponding poroelastic stressing along a basement fault. This study presents a rigorous modeling scheme with optimal geological and operational parameters needed to be considered in seismic monitoring and mitigation strategies for safe GCS.

Publisher

Seismological Society of America (SSA)

Subject

Geophysics

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