中文版 | English
Title

Simulation and inversion of deep-towed marine electrical resistivity survey data

Author
Corresponding AuthorYang, Dikun
DOI
Publication Years
2022-08-15
Conference Name
2nd International Meeting for Applied Geoscience and Energy, IMAGE 2022
ISSN
1052-3812
EISSN
1949-4645
Source Title
Volume
2022-August
Pages
712-716
Conference Date
August 28, 2022 - September 1, 2022
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 TypeConference paper
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/519765
DepartmentDepartment of Earth and Space Sciences
Affiliation
Department of Earth and Space Sciences, Southern University of Science and Technology, China
First Author AffilicationDepartment of Earth and Space Sciences
Corresponding Author AffilicationDepartment of Earth and Space Sciences
First Author's First AffilicationDepartment 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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