Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of Microwaves. Optoelectronics and Electromagnetic Applications |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742017000100284 |
Resumo: | Abstract In this paper we present an efficient mode-matching technique to analyze tilted-coil antennas in anisotropic geophysical formations. In this problem, a number of coil antennas with arbitrary relative tilt angle with respect to the symmetry axis are used to radiate electromagnetic fields in a cylindrically layered medium comprised of a metallic mandrel, a borehole, and a surrounding layered Earth formation. This configuration corresponds to that of directional well-logging tools used in oil and gas exploration. Our technique combines closed-form solutions for the Maxwell's Equations in uniaxially anisotropic and radially-stratified cylindrical coordinates with the generalized scattering matrix (GSM) at each axial discontinuity based on the modematching technique. The field from the transmitter tilted-coil source is represented by a set of modal coefficients which, after computation using GSM matrices, are used to compute the transimpedances. We present validation results which show that our technique can efficiently model directional well-logging tools used for oil and gas exploration. |
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Journal of Microwaves. Optoelectronics and Electromagnetic Applications |
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Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical FormationsAnisotropic mediamode matching methodsstratified mediawell logging toolsAbstract In this paper we present an efficient mode-matching technique to analyze tilted-coil antennas in anisotropic geophysical formations. In this problem, a number of coil antennas with arbitrary relative tilt angle with respect to the symmetry axis are used to radiate electromagnetic fields in a cylindrically layered medium comprised of a metallic mandrel, a borehole, and a surrounding layered Earth formation. This configuration corresponds to that of directional well-logging tools used in oil and gas exploration. Our technique combines closed-form solutions for the Maxwell's Equations in uniaxially anisotropic and radially-stratified cylindrical coordinates with the generalized scattering matrix (GSM) at each axial discontinuity based on the modematching technique. The field from the transmitter tilted-coil source is represented by a set of modal coefficients which, after computation using GSM matrices, are used to compute the transimpedances. We present validation results which show that our technique can efficiently model directional well-logging tools used for oil and gas exploration.Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo2017-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742017000100284Journal of Microwaves, Optoelectronics and Electromagnetic Applications v.16 n.1 2017reponame:Journal of Microwaves. Optoelectronics and Electromagnetic Applicationsinstname:Sociedade Brasileira de Microondas e Optoeletrônica (SBMO)instacron:SBMO10.1590/2179-10742017v16i1889info:eu-repo/semantics/openAccessRosa,Guilherme S.Bergmann,José R.Teixeira,Fernando L.eng2017-03-31T00:00:00Zoai:scielo:S2179-10742017000100284Revistahttp://www.jmoe.org/index.php/jmoe/indexONGhttps://old.scielo.br/oai/scielo-oai.php||editor_jmoe@sbmo.org.br2179-10742179-1074opendoar:2017-03-31T00:00Journal of Microwaves. Optoelectronics and Electromagnetic Applications - Sociedade Brasileira de Microondas e Optoeletrônica (SBMO)false |
dc.title.none.fl_str_mv |
Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations |
title |
Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations |
spellingShingle |
Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations Rosa,Guilherme S. Anisotropic media mode matching methods stratified media well logging tools |
title_short |
Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations |
title_full |
Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations |
title_fullStr |
Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations |
title_full_unstemmed |
Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations |
title_sort |
Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations |
author |
Rosa,Guilherme S. |
author_facet |
Rosa,Guilherme S. Bergmann,José R. Teixeira,Fernando L. |
author_role |
author |
author2 |
Bergmann,José R. Teixeira,Fernando L. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Rosa,Guilherme S. Bergmann,José R. Teixeira,Fernando L. |
dc.subject.por.fl_str_mv |
Anisotropic media mode matching methods stratified media well logging tools |
topic |
Anisotropic media mode matching methods stratified media well logging tools |
description |
Abstract In this paper we present an efficient mode-matching technique to analyze tilted-coil antennas in anisotropic geophysical formations. In this problem, a number of coil antennas with arbitrary relative tilt angle with respect to the symmetry axis are used to radiate electromagnetic fields in a cylindrically layered medium comprised of a metallic mandrel, a borehole, and a surrounding layered Earth formation. This configuration corresponds to that of directional well-logging tools used in oil and gas exploration. Our technique combines closed-form solutions for the Maxwell's Equations in uniaxially anisotropic and radially-stratified cylindrical coordinates with the generalized scattering matrix (GSM) at each axial discontinuity based on the modematching technique. The field from the transmitter tilted-coil source is represented by a set of modal coefficients which, after computation using GSM matrices, are used to compute the transimpedances. We present validation results which show that our technique can efficiently model directional well-logging tools used for oil and gas exploration. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742017000100284 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742017000100284 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/2179-10742017v16i1889 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo |
publisher.none.fl_str_mv |
Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo |
dc.source.none.fl_str_mv |
Journal of Microwaves, Optoelectronics and Electromagnetic Applications v.16 n.1 2017 reponame:Journal of Microwaves. Optoelectronics and Electromagnetic Applications instname:Sociedade Brasileira de Microondas e Optoeletrônica (SBMO) instacron:SBMO |
instname_str |
Sociedade Brasileira de Microondas e Optoeletrônica (SBMO) |
instacron_str |
SBMO |
institution |
SBMO |
reponame_str |
Journal of Microwaves. Optoelectronics and Electromagnetic Applications |
collection |
Journal of Microwaves. Optoelectronics and Electromagnetic Applications |
repository.name.fl_str_mv |
Journal of Microwaves. Optoelectronics and Electromagnetic Applications - Sociedade Brasileira de Microondas e Optoeletrônica (SBMO) |
repository.mail.fl_str_mv |
||editor_jmoe@sbmo.org.br |
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1752122126164295680 |