Exploration of resistive targets within shallow marine environments using the circular electrical dipole and the differential electrical dipole methods: a time-domain modelling study

Haroon, Amir; Mogilatov, V.S.; Goldman, M.; Bergers, R.; Tezkan, B.

doi:10.1093/gji/ggw051

Cited by 15 publications

(4 citation statements)

References 22 publications

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“…For smaller CED, however, providing the necessary symmetry might face a severe technical problem (Haroon et al . ). Although strictly speaking, the practical CED generates mixed TE–TM field, the TE field is so deeply cancelled in the ground that it causes no effect on real data.…”

Section: Field Surveys With a Circular Electric Dipole Source Of Altementioning

confidence: 97%

“…The necessary geometrical symmetry is easily maintained using differential GPS in the practical range of CED radii (between 200 m and 1500 m). For smaller CED, however, providing the necessary symmetry might face a severe technical problem (Haroon et al 2016). Although strictly speaking, the practical CED generates mixed TE-TM field, the TE field is so deeply cancelled in the ground that it causes no effect on real data.…”

Section: F I E L D S U R V E Y S W I T H a C I R C U L A R E L E C T mentioning

confidence: 99%

“…Although the application of alternating unimodal TEM fields represents a novel approach in geoelectrics, the development of circular electric dipole (CED) transmitters started quite long time ago (Mogilatov 1996;Mogilatov and Balashov 1996). Since then, numerous CED surveys using magnetic field receivers have been conducted in Russia and worldwide and further theoretical development based on multidimensional modelling has been carried out (e.g., Mogilatov et al 2014;Goldman et al 2015;Haroon et al 2016;Mogilatov et al 2016). In addition to the aforementioned CED transmitter, the unimodal TM field can be generated by vertical electric lines (VELs) or vertical electric dipoles (VEDs), which are hard to apply on land and are being developed mainly for marine applications.…”

Section: Introductionmentioning

confidence: 99%

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Transient electromagnetic surveys with unimodal transverse magnetic field: ideas and results

Mogilatov

Zlobinskiy

Balashov

2016

Geophysical Prospecting

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The theory behind transient electromagnetic surveys can be well described in terms of transverse magnetic and transverse electric modes. Soundings using transverse magnetic and transverse electric modes require different source configurations. In this study, we consider an alternating transverse magnetic field excitation by a circular electric dipole. The circular electric dipole transmitter is a horizontal analogue of the vertical electric dipole. Offshore surveys using circular electric dipole might represent an alternative to the conventional marine controlled‐source electromagnetic method at shallow sea and/or for exploring relatively small targets. Field acquisition is carried out by recording either electric or magnetic responses. Electric responses bear information on the 1D structure of a layered earth and successfully resolve high‐resistivity targets in marine surveys. Land‐based circular electric dipole soundings are affected by induced polarisation. On the contrary, magnetic responses are absent on the surface of a 1D earth, and as a result, they are very sensitive to any and even very small 3D conductivity perturbations. In addition, they are sensitive to induced polarisation or some other polarisation effects in the subsurface. At present, circular electric dipole transmitters and magnetic receivers are successfully used in on‐land mineral and petroleum exploration.

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Section: Field Surveys With a Circular Electric Dipole Source Of Altementioning

confidence: 97%

Section: F I E L D S U R V E Y S W I T H a C I R C U L A R E L E C T mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transient electromagnetic surveys with unimodal transverse magnetic field: ideas and results

Mogilatov

Zlobinskiy

Balashov

2016

Geophysical Prospecting

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“…CED is a sort of sounding that excites transverse magnetic (TM) fields in the ground, which results in a transient response to a pulse excitation strongly dependent on medium constitutive parameters. Recently, new field tests have been held in order to evaluate the potential of using this type of sounding to identify resistive layers that represent hydrocarbon saturated formations [21]- [23].…”

Section: Introductionmentioning

confidence: 99%

Computational Modeling of Geoelectrical Soundings using PML-FDTD

Ribeiro

Novo

2017

J. Microw. Optoelectron. Electromagn. Appl.

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One‐dimensional forward and inversion of direct current resistivity arrays: Introducing differential and integral arrays

Ling,

Dai,

Zhou

et al. 2024

Near Surface Geophysics

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To enhance the vertical resolution of direct current resistivity method, this study introduces differential and integrating arrays and explains the basic principle and expression of apparent resistivity. Forward and inversion modelling in layered media was conducted to demonstrate the vertical resolution of these two arrays through several examples. The results indicate that the differential array has improved sensitivity and vertical resolution compared to other arrays for layered media structures. However, the integral and dipole–dipole arrays have the same resolution to the underground structures, which is inferior to the differential array.

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Exploration of resistive targets within shallow marine environments using the circular electrical dipole and the differential electrical dipole methods: a time-domain modelling study

Cited by 15 publications

References 22 publications

Transient electromagnetic surveys with unimodal transverse magnetic field: ideas and results

Transient electromagnetic surveys with unimodal transverse magnetic field: ideas and results

Computational Modeling of Geoelectrical Soundings using PML-FDTD

One‐dimensional forward and inversion of direct current resistivity arrays: Introducing differential and integral arrays

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