| Title | Monitoring natural gas storage using Synthetic Aperture Radar: are the residuals informative? |
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| Author | Vasco, D W ;
Samsonov, S V; Wang, K; Burgmann, R; Jeanne, P; Foxall, W;
Zhang, Y |
| Source | Geophysical Journal International vol. 228, 2022 p. 1438-1456, https://doi.org/10.1093/gji/ggab409  Open Access |
| Image |  |
| Year | 2022 |
| Alt Series | Natural Resources Canada, Contribution Series 20210610 |
| Publisher | Oxford University Press |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Area | United States of America |
| Lat/Long WENS | -118.5000 -118.2500 34.5000 34.2500 |
| Subjects | geophysics; Science and Technology; soil mechanics; rock mechanics; radar methods; radar imagery; satellite geodesy; deformation |
| Illustrations | location maps; distribution diagrams; plots; cross-sections |
| Program | Canada Centre for Remote Sensing People Support and Leadership |
| Released | 2022 02 01 |
| Abstract | (Summary)
Estimates of line-of-sight (LOS) displacements from Interferometric Synthetic Aperture Radar (InSAR) observations serve as the basis of the long-term monitoring of an operating
natural gas storage site at Honor Rancho in California. An inversion algorithm is used to estimate the portion of the signal that is attributable to deformation within the gas storage reservoir, located at a depth of around 3 km. Removing this
contribution produces residuals that are used to characterize the background variation is surface deformation at the gas storage facility and to determine a threshold that can signify unusually large residuals. An application to almost 7 yr of InSAR
data, from 2011 until 2018, indicates that there are intervals of heightened residuals as well as brief episodes of anomalously large misfits. An examination of the spatial distributions of the individual residual LOS displacements indicates larger
displacements in an alluvial valley just south of the reservoir, with rapid spatial variations in sign, indicating a rather shallow origin. Furthermore, the two anomalous events also involve rapid spatial variations in the LOS displacement residuals
directly above the storage facility. The results demonstrate that the technique of extracting residuals after removing the reservoir signal is a useful approach, even in the case of this deep reservoir, and is a promising method for long-term
monitoring. |
| Summary | (Plain Language Summary, not published)
Estimates of radar observations serve as the basis of the long-term monitoring of an operating natural gas storage site at Honor Rancho in California. An
inversion algorithm is used to estimate the portion of the signal that is attributable to deformation within the gas storage reservoir, located at a depth of around 3 km. Removing this contribution produces residuals that are used to characterize the
background variation is surface deformation at the gas storage facility and to determine a threshold that can signify unusually large residuals. The results demonstrate that the technique of extracting residuals after removing the reservoir signal is
a useful approach, even in the case of this deep reservoir, and is a promising method for long-term monitoring. |
| GEOSCAN ID | 329559 |
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