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Application of State of Stress Analysis Tool (SoSAT) to Estimate Risk of Induced Seismicity From CO2 Injections

Description: 

The sequestration, storage, and utilization of anthropogenic carbon emissions is projected to play a major role in mitigating the accumulation of greenhouse gases worldwide. CO₂ can be injected under supercritical fluid conditions into subsurface geologic units like saline aquifers, basalt formations, depleted/matured oil and natural gas reservoirs. The focus of this study is to demonstrate the application of State of Stress Analysis Tool (SoSAT), developed under the National Risk Assessment Partnership (NRAP), in estimating the probability of failure due to hydraulic fracture or seismic fault activation, both of which are major risks anticipated under incremental CO₂ injection pressure. SoSAT uses a Bayesian approach for geomechanical uncertainty quantification and risk assessment. Various constraints, including those based on stress measurement, regional stress environment, and borehole breakouts, can be applied to constrain the posterior probability distribution of in-situ stresses. This allows for the computation of the risk associated with induced seismicity. The ultimate goal is to create a seismic risk index map for the western USA for the Carbon Utilization and Storage Partnership (CUSP) which will provide guidance on CO₂ injection operations for commercial-scale carbon storage.

Session: Seismic Monitoring, Modelling and Management Needed for Geothermal Energy and Geologic Carbon Storage [Poster Session]

Type: Poster

Date: 5/2/2024

Presentation Time: 08:00 AM (local time)

Presenting Author: Swasti

Student Presenter: No

Invited Presentation: 

Authors