Electromagnetic field due to a loop antenna in a borehole

Author

Long, Yunliang ; Jiang, Hongyan ; Lin, Yikun

Author_Institution

Dept. of Electron., Zhongshan Univ., Guangzhou, China

Volume

34

Issue

1

fYear

1996

fDate

1/1/1996 12:00:00 AM

Firstpage

33

Lastpage

35

Abstract

The radiation of a loop antenna embedded in a borehole with complicated geometry is analyzed by perturbation method and an efficient fast multiple-integration technique. The perturbation method is not used directly because there is a drill-stem whose conductivity and magnetic permeability are very large in the borehole. The prolate ellipsoid equivalence of the metal drill-rod is made, then the drill-rod may be removed and the perturbation method is valid. Some numerical results indicate that the approach is efficient and stable at low frequencies

Keywords

geophysical prospecting; geophysical techniques; terrestrial electricity; EM field; EM radiation; borehole method; drill-stem whose conductivity; electromagnetic field; fast multiple-integration; geoelectric method; geophysical measurement technique; loop antenna; magnetic permeability; metal drill-rod; perturbation method; prolate ellipsoid equivalence; prospecting; terrestrial electricity; Conductivity; Earth; Electromagnetic fields; Ellipsoids; Frequency; Geometry; Magnetic analysis; Permeability; Perturbation methods; Telemetry;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/36.481889

Filename

481889