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Analysis of electromagnetic well-log...

Hue, Yik-Kiong.

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Analysis of electromagnetic well-logging tools.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Analysis of electromagnetic well-logging tools./
Author:	Hue, Yik-Kiong.
Description:	193 p.
Notes:	Adviser: Fernando Teixeira.
Contained By:	Dissertation Abstracts International67-05B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3217366
ISBN:	9780542686139

Analysis of electromagnetic well-logging tools.
Hue, Yik-Kiong.

Analysis of electromagnetic well-logging tools. - 193 p.

Adviser: Fernando Teixeira.

Thesis (Ph.D.)--The Ohio State University, 2006.

This dissertation presents numerical and pseudoanalytical modeling techniques for the analysis of electromagnetic well logging tools in complex geophysical formations. The well-logging tools modeled here include measurement-while-drilling/logging-while drilling (MWD/LWD) tools employing horizontal coil and for tilted-coil antenna arrays. The electromagnetic response of such tools are studied in cylindrical layered formations, including eccentric borehole, dipping bed layers, and/or anisotropic conductivities.

ISBN: 9780542686139Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Analysis of electromagnetic well-logging tools.
LDR:03095nam 2200313 a 45 001 965252
005 20110906
008 110906s2006 eng d
020 $a 9780542686139
035 $a (UnM)AAI3217366
035 $a AAI3217366
040 $a UnM $c UnM
100 1 $a Hue, Yik-Kiong. $3 1288029
245 1 0 $a Analysis of electromagnetic well-logging tools.
300 $a 193 p.
500 $a Adviser: Fernando Teixeira.
500 $a Source: Dissertation Abstracts International, Volume: 67-05, Section: B, page: 2742.
502 $a Thesis (Ph.D.)--The Ohio State University, 2006.
520 $a This dissertation presents numerical and pseudoanalytical modeling techniques for the analysis of electromagnetic well logging tools in complex geophysical formations. The well-logging tools modeled here include measurement-while-drilling/logging-while drilling (MWD/LWD) tools employing horizontal coil and for tilted-coil antenna arrays. The electromagnetic response of such tools are studied in cylindrical layered formations, including eccentric borehole, dipping bed layers, and/or anisotropic conductivities.
520 $a The three main techniques used for modeling are the finite-difference time-domain (FDTD), a pseudoanalytical method, and numerical mode-matching. The FDTD method is implemented three-dimensional (3-D) cylindrical coordinates to handle arbitrary 3-D complex formations. The FDTD method developed here incorporates the following extensions: (i) A perfectly matched layer (PML) absorbing boundary condition in cylindrical coordinates to mimic open region problems, (ii) an efficient frequency domain data extraction technique to yield frequency domain data from early time domain data, (iii) two locally-conformal FDTD (LC-FDTD) techniques to model eccentric boreholes, and (iv) a scaling permittivity technique to overcome the Courant stability limit at the low frequency range.
520 $a To provide validation results and a faster solution method in simpler formations, including multiple asymmetric cylindrical layered formations with eccentric boreholes, a pseudoanalytical method is also developed. This method is based on a decomposition of the solution into spectral components and on the use of the addition theorem for cylindrical waves to tackle eccentric borehole problems.
520 $a Finally, a NMM method is developed and employed to model tilt-coil antenna array in multilayered anisotropic formations. The present NMM is based on an expansion of the field components in terms of vertical eigenmodes, and incorporates a PML in the vertical direction. B-splines are used to expand the fields in the vertical direction and cylindrical Bessel/Hankel functions are used for the radial dependency. The results from each method are validated against each other, showing very good agreement.
590 $a School code: 0168.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Engineering, Petroleum. $3 1018448
690 $a 0544
690 $a 0765
710 2 0 $a The Ohio State University. $3 718944
773 0 $t Dissertation Abstracts International $g 67-05B.
790 $a 0168
790 1 0 $a Teixeira, Fernando, $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3217366