Computer modeling of geoelectromagnetic fields in three-dimensional media by the finite element method

Persova, Marina G.; Soloveichik, Yuri G.; Trigubovigh, G. M.

doi:10.1134/s1069351311010095

Cited by 28 publications

(10 citation statements)

References 5 publications

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“…(1) is solved by the vector finite element method using the edgebased basis functions on the 3D hexagonal unstructured mesh with terminal nodes (Persova et al, 2011). In the case when the HED is positioned on a profile passing above the center of a symmetrical reservoir, the electromagnetic field can be calculated only in a half of the computational domain.…”

Section: Mathematical Modelmentioning

confidence: 99%

Electromagnetic field analysis in the marine CSEM detection of homogeneous and inhomogeneous hydrocarbon 3D reservoirs

Persova

Soloveichik

Domnikov

et al. 2015

Journal of Applied Geophysics

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Section: Mathematical Modelmentioning

confidence: 99%

Electromagnetic field analysis in the marine CSEM detection of homogeneous and inhomogeneous hydrocarbon 3D reservoirs

Persova

Soloveichik

Domnikov

et al. 2015

Journal of Applied Geophysics

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“…shows the calculated transient signal ( dB φ / dt ) at the Earth's surface at 9.7 ms. Both the model in the left panel and the calculations in the right panel are produced using program GeoPrep (Persova, Soloveichik and Trigubovich ). One can see that, even without any processing and interpretation, the contours of the target area delineated fairly well.…”

Section: Magnetic Field Of Circular Electric Dipolementioning

confidence: 99%

“…Transient responses were acquired with an inductive receiver (10000-m 2 effective area) using the Cycle-7 measurement system. Theoretical responses of the 3D models were computed using the GeoPrep program (Persova et al 2011). Figure 12 demonstrates all major steps in the interpretation of the data.…”

Section: E R T I C a L E L E C T R I C C U R R E N T S O U N D I N mentioning

confidence: 99%

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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“…For these calculations, we use the method of separating the field into a normal field and an abnormal field (Persova et al 2011). In this case, the distribution of the EM-field is three-dimensional.…”

Section: M O D E L L I N G R E S U L T Smentioning

confidence: 99%

“…To solve equation (11), we use the vector finiteelement method with H(curl)-conforming the basis functions associated with edges (Persova et al 2011). To solve equation (11), we use the vector finiteelement method with H(curl)-conforming the basis functions associated with edges (Persova et al 2011).…”

Section: M O D E L L I N G R E S U L T Smentioning

confidence: 99%

Transient electromagnetic modelling of an isolated wire loop over a conductive medium

Persova

Soloveichik

Trigubovich

et al. 2014

Geophysical Prospecting

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A large closed wire loop is generally used in field experiments for testing airborne electrical exploration equipment. Thus, methods are required for the precise calculation of an electromagnetic response in the presence of a closed wire loop. We develop a fast and precise scheme for calculating the transient response for such a closed loop laid out at the surface of a horizontally layered conductive ground. Our scheme is based on the relationship between the magnetic flux flowing through a closed loop and the current induced in it. The developed scheme is compared with 2D and 3D finite‐element modelling for several positions of an airborne electromagnetic system flying over a closed loop. We also study the coupling effect between the current flowing in the closed loop and the current flowing in the horizontally layered conductive medium. The result shows that for the central position of the transmitter, the difference between axisymmetrical finite‐element modelling and our scheme is less than 1%. Moreover, for the non‐coaxial transmitter–receiver–loop system, the solution obtained by our scheme is in good agreement with full 3D finite‐element modelling, and our total simulation time is substantially lower: 1 minute versus 120 hours.

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Computer modeling of geoelectromagnetic fields in three-dimensional media by the finite element method

Cited by 28 publications

References 5 publications

Electromagnetic field analysis in the marine CSEM detection of homogeneous and inhomogeneous hydrocarbon 3D reservoirs

Electromagnetic field analysis in the marine CSEM detection of homogeneous and inhomogeneous hydrocarbon 3D reservoirs

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

Transient electromagnetic modelling of an isolated wire loop over a conductive medium

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