Simulating Time-Lapse Seismic Monitoring of Geologic Carbon and Hydrogen Storage With a Stress-Dependent Rock Physics Model
Description:
The Biot-Gassmann equation is widely used for generating elastic models of geologic carbon and hydrogen storage. Laboratory experiments show that rock units filled with free-phase CO2 cause large changes in seismic shear-wave velocities because of chemical reactions between clays and CO2; and numerous chemical reactions are expected to occur between hydrogen and various carbonate, sulfur-bearing, and iron-bearing minerals. However, the Gassmann equation only considers the impact of injected supercritical fluids/gasses on the fluid substitution and does not include the resulting chemical reactions or stress-dependent mechanical changes of rocks. Therefore, we develop a new rock physics model by incorporating stress-dependent rock physics and chemical dissolution/deposition mechanism into seismic models alongside the Gassmann equation for high-fidelity geologic carbon and hydrogen storage characterization and monitoring. For geologic carbon storage monitoring, we create time-lapse elastic models with our new rock physics equation to accurately capture elastic property changes caused by CO2 migration at the Kimberlina CO2 storage site in California. We find that our approach produces larger changes in Vp, Vs, and density than those obtained using classical Biot-Gassmann equation. We further investigate how these changes impact seismic signals computed using 3D finite-difference-based elastic wave equation modeling. For geological hydrogen storage monitoring, we apply our new equation to various types of hydrogen storage cases, including saline aquifers, salt caverns, and hard rock caverns, to study elastic property changes caused by hydrogen injection and extraction. The results are important for building reliable and accurate geological models for hydrogen storage monitoring. Our new rock physics model will serve as an accurate tool of quantifying reservoir changes caused by CO2/H2 leakage and migration and in principle can apply to any underground reservoir of interest to facilitate high-fidelity geophysical modeling, imaging, and monitoring.
LA-UR-23-20164
Session: Seismology for the Energy Transition [Poster]
Type: Poster
Date: 4/18/2023
Presentation Time: 08:00 AM (local time)
Presenting Author: Neala Creasy
Student Presenter: No
Invited Presentation:
Authors
Neala Creasy Presenting Author Corresponding Author nmcreasy@lanl.gov Los Alamos National Laboratory |
Kai Gao kaigao@lanl.gov Los Alamos National Laboratory |
Lianjie Huang ljh@lanl.gov Los Alamos National Laboratory |
Michael Gross michael_gross@lanl.gov Los Alamos National Laboratory |
Erika Gasperikova egasperikova@lbl.gov Lawrence Berkeley National Laboratory |
William Harbert william.harbert@netl.doe.gov National Energy Technology Laboratory |
Tom Bratton tom@tombrattonllc.com Tom Bratton, LLC |
Quanlin Zhou qzhou@lbl.gov Lawrence Berkeley National Laboratory |
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Simulating Time-Lapse Seismic Monitoring of Geologic Carbon and Hydrogen Storage With a Stress-Dependent Rock Physics Model
Category
Seismology for the Energy Transition