Title | Simulation and inversion of deep-towed marine electrical resistivity survey data |
Author | |
Corresponding Author | Yang, Dikun |
DOI | |
Publication Years | 2022-08-15
|
Conference Name | 2nd International Meeting for Applied Geoscience and Energy, IMAGE 2022
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ISSN | 1052-3812
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EISSN | 1949-4645
|
Source Title | |
Volume | 2022-August
|
Pages | 712-716
|
Conference Date | August 28, 2022 - September 1, 2022
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Conference Place | Houston, TX, United states
|
Publisher | |
Abstract | Electrical resistivity surveys in marine environments are often subject to a strong screening effect because conductive seawater can short-circuit most current and prevent the currents from entering the seafloor. We study the deep-towed electrical survey that deploys electrodes as close to the seafloor as possible and still benefits from high mobility and efficiency. In particular, we propose its application in the nearshore and shallow offshore environmental and engineering problems, for which a fault model and a boulder model are tested with a water depth of 50 meters. Most towed marine electrical surveys use the dipole-dipole configuration for convenience, but the depth of penetration can be significantly limited when the thickness of water is much greater than the source electrode spacing. Therefore, we also investigate a deep-towed pole-dipole configuration, in which the remote electrode floats on the water surface sufficiently far away to generate a point-source field near the seafloor. Our simulations have shown that the measured potential difference at long source-receiver offsets decays much more slowly in the pole-dipole than in the dipole-dipole configuration. This advantage enables the pole-dipole configuration to enhance detectability for deep structures. Synthetic inversion experiments also confirm that our deep-towed pole-dipole array can more reliably recover the deep part of targets below the seafloor, whereas the imaging results of the dipole-dipole array may be easily distorted by motion-induced and ambient noises. © 2022 Society of Exploration Geophysicists and the American Association of Petroleum Geologists. |
SUSTech Authorship | First
; Corresponding
|
Language | English
|
Indexed By | |
Funding Project | This work was supported by the Natural Science Foundation of Guangdong Province under grant no. 2020A1515011074.
|
EI Accession Number | 20230413445928
|
EI Keywords | Dipole antennas
; Electric conductivity
; Offshore oil well production
; Poles
; Surface waters
|
ESI Classification Code | Structural Members and Shapes:408.2
; Surface Water:444.1
; Oil Field Production Operations:511.1
; Electricity: Basic Concepts and Phenomena:701.1
|
Data Source | EV Compendex
|
Citation statistics |
Cited Times [WOS]:0
|
Document Type | Conference paper |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/519765 |
Department | Department of Earth and Space Sciences |
Affiliation | Department of Earth and Space Sciences, Southern University of Science and Technology, China |
First Author Affilication | Department of Earth and Space Sciences |
Corresponding Author Affilication | Department of Earth and Space Sciences |
First Author's First Affilication | Department of Earth and Space Sciences |
Recommended Citation GB/T 7714 |
Yang, Dikun,Zhang, Yuchao. Simulation and inversion of deep-towed marine electrical resistivity survey data[C]:Society of Exploration Geophysicists,2022:712-716.
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