DocumentCode :
944118
Title :
The response functions of electromagnetic wave logs and their applications
Author :
Xing, Guanglong ; Yang, Shande
Author_Institution :
Coll. of Phys., Jilin Univ., Jilin ChangChun, China
Volume :
44
Issue :
6
fYear :
2006
fDate :
6/1/2006 12:00:00 AM
Firstpage :
1413
Lastpage :
1418
Abstract :
A fundamental feature of the electromagnetic wave logs is the logging response (phase difference and amplitude ratio) dependent on the both dielectric constant and conductivity in general. We derived the response functions (RF) of the electromagnetic wave logs and proposed their fast algorithm based on an integral equation of electromagnetic field and a weak scattering approximation. Using the fast algorithm of RF in the inhomogenous, a fast algorithm of Jacobi matrix was to be advanced easily. A theoretical results about the response characteristics of phase difference and amplitude ratio were also gained. It was shown that the phase difference is sensitive to the conductivity within substantially the same volume as the amplitude ratio is sensitive to the dielectric constant, and the phase difference is sensitive to the dielectric constant within substantially the same volume as the amplitude ratio is sensitive to the conductivity, in the homogeneous medium.
Keywords :
Jacobian matrices; electric field integral equations; electrical conductivity; electromagnetic field theory; magnetic field integral equations; oil drilling; permittivity; well logging; Jacobi matrix; amplitude ratio; conductivity; dielectric constant; electromagnetic field; electromagnetic wave logs; fast algorithm; integral equation; logging response; phase difference; response function; weak scattering approximation; Conductivity measurement; Dielectric constant; Electromagnetic fields; Electromagnetic scattering; Geophysical measurements; Integral equations; Jacobian matrices; Phase measurement; Physics; Radio frequency; Electromagnetic wave logs; Jacobi matrix; fast algorithm; response functions;
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
Publisher :
ieee
ISSN :
0196-2892
Type :
jour
DOI :
10.1109/TGRS.2006.870437
Filename :
1634704
Link To Document :
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