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A Novel Passive Source Basin Scale Seismic Monitoring Approach of Carbon Storage Sites

Description: 

Large-scale geologic carbon storage (GCS) requires affordable geophysical tools for imaging and monitoring of subsurface CO2 plumes. Compared with active seismic methods, passive seismic surveys are low-cost but need enhanced resolution and event location precision. An improved passive seismic method and a high-resolution basin-scale earth model are crucial for cost-effective monitoring carbon storage. We will explore and test a novel passive seismic approach for basin scale GCS monitoring. This approach will also benefit source characterization by providing improved basin-scale earth models. Our technique uses adjoint waveform tomography, leveraging the long-lasting amplified seismic waves in the basin to passively image carbon plumes. The longer time windows selected for the adjoint waveform inversion contain information about the reverberating waves passing through the carbon plume, enabling high-resolution imaging of the carbon plume using only a few natural earthquakes. Our preliminary adjoint waveform tomography in Alaska's Nenana Basin, utilizing one seismic event and a single iteration, shows that shear wave sensitivity is significantly enhanced in the basin. This approach is expected to fill a critical technology gap in GCS monitoring, utilizing open source automated seismic adjoint tomography tool and data from existing CO2 storage sites.

Session: Seismology for the Energy Transition [Poster]

Type: Poster

Date: 4/16/2025

Presentation Time: 08:00 AM (local time)

Presenting Author: Yuan

Student Presenter: No

Invited Presentation: 

Poster Number: 135

Authors