Seismic Imaging Capability for Locating CO2 Leakage: A Synthetic Study
Abstract
The 3D Kimberlina 2 model is built for modeling hypothetical, commercial-scale geologic carbon storage and CO2 leakage through a real fault at the Kimberlina site in the southern San Joaquin Basin, CA. The model is used for studies in the U.S. National Risk Assessment Program, a collaborative research program among the U.S. Department of Energy's national laboratories. We use the 2D Kimberlina elastic models with various stages of CO2 leakage to study the capability of seismic imaging for locating CO2 leakage plumes. We use the models to generate synthetic surface elastic-wave reflection data, and perform least-squares elastic reverse-time migration to invert for images of P- and S-wave velocities and density. We use the time-lapse differences of the images obtained from noise-free and noisy data to locate plumes of leaked CO2 in the shallow, middle, and deep formations. Our results show that least-squares elastic reverse-time migration can locate the very early stages of CO2 leakage with noise-free data, and that the capability decreases with increasing noise levels.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2020
- Bibcode:
- 2020AGUFMS009.0011F
- Keywords:
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- 0599 General or miscellaneous;
- COMPUTATIONAL GEOPHYSICS;
- 0999 General or miscellaneous;
- EXPLORATION GEOPHYSICS;
- 7290 Computational seismology;
- SEISMOLOGY;
- 7299 General or miscellaneous;
- SEISMOLOGY