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Title: Dynamics of geologic CO 2 storage and plume motion revealed by seismic coda waves

Abstract

Quantifying the dynamics of sequestered CO 2 plumes is critical for safe long-term storage, providing guidance on plume extent, and detecting stratigraphic seal failure. However, existing seismic monitoring methods based on wave reflection or transmission probe a limited rock volume and their sensitivity decreases as CO 2 saturation increases, decreasing their utility in quantitative plume mass estimation. Here we show that seismic scattering coda waves, acquired during continuous borehole monitoring, are able to illuminate details of the CO 2 plume during a 74-h CO 2 injection experiment at the Frio-II well Dayton, TX. Our study reveals a continuous velocity reduction during the dynamic injection of CO 2 , a result that augments and dramatically improves upon prior analyses based on P-wave arrival times. We show that velocity reduction is nonlinearly correlated with the injected cumulative CO 2 mass and attribute this correlation to the fact that coda waves repeatedly sample the heterogeneous distribution of cumulative CO 2 in the reservoir zone. Lastly, because our approach does not depend on P-wave arrival times or require well-constrained wave reflections it can be used with many source–receiver geometries including those external to the reservoir, which reduces the risk introduced by in-reservoir monitoring wells.more » Our results provide an approach for quantitative CO 2 monitoring and plume evolution that increases safety and long-term planning for CO 2 injection and storage.« less

Authors:
ORCiD logo [1];  [2];  [2];  [3]
  1. Pennsylvania State Univ., University Park, PA (United States). Dept. of Geosciences. EMS Energy Inst. Inst. of Natural Gas Research
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Geosciences Division
  3. Pennsylvania State Univ., University Park, PA (United States). Dept. of Geosciences. EMS Energy Inst.
Publication Date:
Research Org.:
Pennsylvania State Univ., University Park, PA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Pennsylvania State Univ. (United States)
OSTI Identifier:
1492005
Alternate Identifier(s):
OSTI ID: 1492084
Grant/Contract Number:  
FE0031544; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 116; Journal Issue: 7; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; CO2 sequestration; geologic monitoring; coda wave; flow rate; mass quantification

Citation Formats

Zhu, Tieyuan, Ajo-Franklin, Jonathan, Daley, Thomas M., and Marone, Chris. Dynamics of geologic CO2 storage and plume motion revealed by seismic coda waves. United States: N. p., 2019. Web. doi:10.1073/pnas.1810903116.
Zhu, Tieyuan, Ajo-Franklin, Jonathan, Daley, Thomas M., & Marone, Chris. Dynamics of geologic CO2 storage and plume motion revealed by seismic coda waves. United States. doi:10.1073/pnas.1810903116.
Zhu, Tieyuan, Ajo-Franklin, Jonathan, Daley, Thomas M., and Marone, Chris. Tue . "Dynamics of geologic CO2 storage and plume motion revealed by seismic coda waves". United States. doi:10.1073/pnas.1810903116.
@article{osti_1492005,
title = {Dynamics of geologic CO2 storage and plume motion revealed by seismic coda waves},
author = {Zhu, Tieyuan and Ajo-Franklin, Jonathan and Daley, Thomas M. and Marone, Chris},
abstractNote = {Quantifying the dynamics of sequestered CO 2 plumes is critical for safe long-term storage, providing guidance on plume extent, and detecting stratigraphic seal failure. However, existing seismic monitoring methods based on wave reflection or transmission probe a limited rock volume and their sensitivity decreases as CO 2 saturation increases, decreasing their utility in quantitative plume mass estimation. Here we show that seismic scattering coda waves, acquired during continuous borehole monitoring, are able to illuminate details of the CO 2 plume during a 74-h CO 2 injection experiment at the Frio-II well Dayton, TX. Our study reveals a continuous velocity reduction during the dynamic injection of CO 2 , a result that augments and dramatically improves upon prior analyses based on P-wave arrival times. We show that velocity reduction is nonlinearly correlated with the injected cumulative CO 2 mass and attribute this correlation to the fact that coda waves repeatedly sample the heterogeneous distribution of cumulative CO 2 in the reservoir zone. Lastly, because our approach does not depend on P-wave arrival times or require well-constrained wave reflections it can be used with many source–receiver geometries including those external to the reservoir, which reduces the risk introduced by in-reservoir monitoring wells. Our results provide an approach for quantitative CO 2 monitoring and plume evolution that increases safety and long-term planning for CO 2 injection and storage.},
doi = {10.1073/pnas.1810903116},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 7,
volume = 116,
place = {United States},
year = {2019},
month = {2}
}

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This content will become publicly available on February 12, 2020
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