DAS-VSP interferometric imaging: CO2CRC Otway Project feasibility study
Recent advancements in distributed acoustic sensing (DAS) technology open new ways for borehole-based seismic monitoring of CO2 geosequestration. Compared to 4D surface seismic monitoring, repeated vertical seismic profiling (VSP) surveys with DAS receivers considerably reduce the cost and invasiven...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | English |
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SOC EXPLORATION GEOPHYSICISTS
2021
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| Online Access: | http://hdl.handle.net/20.500.11937/97509 |
| _version_ | 1848766286532706304 |
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| author | Sidenko, Evgeny Tertyshnikov, Konstantin Bona, Andrej Pevzner, Roman |
| author_facet | Sidenko, Evgeny Tertyshnikov, Konstantin Bona, Andrej Pevzner, Roman |
| author_sort | Sidenko, Evgeny |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Recent advancements in distributed acoustic sensing (DAS) technology open new ways for borehole-based seismic monitoring of CO2 geosequestration. Compared to 4D surface seismic monitoring, repeated vertical seismic profiling (VSP) surveys with DAS receivers considerably reduce the cost and invasiveness of time-lapse CO2 monitoring. However, standard borehole imaging techniques cannot provide the same level of reservoir illumination as 3D surface seismic. The performance of VSP imaging can be significantly improved with interferometric utilization of free-surface multiples. We have developed a feasibility study of interferometric imaging with a synthetic walkaway VSP data set, followed by its application to field walkaway VSP data recorded by conventional borehole geophones and two types of DAS (standard and engineered fibers). Both experiments (synthetic and field) demonstrate that interferometric imaging is a viable method to extend the subsurface image beyond the coverage of standard VSP imaging. Specifically, the interferometry approach provides a more detailed upper section of the subsurface, whereas standard migration of primary reflections provides a more detailed bottom part of the image. Comparison of the standard and engineered fibers indicates that both fibers are sensitive to free-surface multiples, but the engineered fiber provides a much higher signal-to-noise ratio; thus, it is preferable for interferometric imaging with multiples. The result obtained with the engineered DAS cable indicates that in the depth range suitable for both methods, the VSP interferometric image of the reflectors is comparable to the surface seismic image. The experiment on the field DAS data proves that DAS is sensitive enough to record the nonprimary wavefield for imaging and monitoring of the subsurface. |
| first_indexed | 2025-11-14T11:48:44Z |
| format | Journal Article |
| id | curtin-20.500.11937-97509 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:48:44Z |
| publishDate | 2021 |
| publisher | SOC EXPLORATION GEOPHYSICISTS |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-975092025-06-03T02:24:39Z DAS-VSP interferometric imaging: CO2CRC Otway Project feasibility study Sidenko, Evgeny Tertyshnikov, Konstantin Bona, Andrej Pevzner, Roman Science & Technology Physical Sciences Geochemistry & Geophysics Recent advancements in distributed acoustic sensing (DAS) technology open new ways for borehole-based seismic monitoring of CO2 geosequestration. Compared to 4D surface seismic monitoring, repeated vertical seismic profiling (VSP) surveys with DAS receivers considerably reduce the cost and invasiveness of time-lapse CO2 monitoring. However, standard borehole imaging techniques cannot provide the same level of reservoir illumination as 3D surface seismic. The performance of VSP imaging can be significantly improved with interferometric utilization of free-surface multiples. We have developed a feasibility study of interferometric imaging with a synthetic walkaway VSP data set, followed by its application to field walkaway VSP data recorded by conventional borehole geophones and two types of DAS (standard and engineered fibers). Both experiments (synthetic and field) demonstrate that interferometric imaging is a viable method to extend the subsurface image beyond the coverage of standard VSP imaging. Specifically, the interferometry approach provides a more detailed upper section of the subsurface, whereas standard migration of primary reflections provides a more detailed bottom part of the image. Comparison of the standard and engineered fibers indicates that both fibers are sensitive to free-surface multiples, but the engineered fiber provides a much higher signal-to-noise ratio; thus, it is preferable for interferometric imaging with multiples. The result obtained with the engineered DAS cable indicates that in the depth range suitable for both methods, the VSP interferometric image of the reflectors is comparable to the surface seismic image. The experiment on the field DAS data proves that DAS is sensitive enough to record the nonprimary wavefield for imaging and monitoring of the subsurface. 2021 Journal Article http://hdl.handle.net/20.500.11937/97509 10.1190/INT-2021-0038.1 English SOC EXPLORATION GEOPHYSICISTS restricted |
| spellingShingle | Science & Technology Physical Sciences Geochemistry & Geophysics Sidenko, Evgeny Tertyshnikov, Konstantin Bona, Andrej Pevzner, Roman DAS-VSP interferometric imaging: CO2CRC Otway Project feasibility study |
| title | DAS-VSP interferometric imaging: CO2CRC Otway Project feasibility study |
| title_full | DAS-VSP interferometric imaging: CO2CRC Otway Project feasibility study |
| title_fullStr | DAS-VSP interferometric imaging: CO2CRC Otway Project feasibility study |
| title_full_unstemmed | DAS-VSP interferometric imaging: CO2CRC Otway Project feasibility study |
| title_short | DAS-VSP interferometric imaging: CO2CRC Otway Project feasibility study |
| title_sort | das-vsp interferometric imaging: co2crc otway project feasibility study |
| topic | Science & Technology Physical Sciences Geochemistry & Geophysics |
| url | http://hdl.handle.net/20.500.11937/97509 |