Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations

Detalhes bibliográficos
Autor(a) principal: Rosa,Guilherme S.
Data de Publicação: 2017
Outros Autores: Bergmann,José R., Teixeira,Fernando L.
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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spelling 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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