A Comparison of Two Numerical Mode-Matching Methodologies for the Analysis of Inhomogeneous Media With Radial and Vertical Stratifications

Rosa, Guilherme S.; Canabarro, Maiquel S.; Bergmann, J.R.; Teixeira, Fernando L.

doi:10.1109/tap.2018.2872782

Cited by 12 publications

(14 citation statements)

References 30 publications

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“…Adopting a notation similar to that in [18], [33], the Maxwell's equations in an anisotropic media can be used to derive the vector wave equations…”

Section: A Electromagnetic Field Scattered By Anisotropic Objectmentioning

confidence: 99%

A Combined Mode-Matching Technique and Born Approximation Method to Model Well-Logging Sensors in Non-Axisymmetric Boreholes

2021

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This paper presents a study on pseudo-analytic techniques for modeling electromagnetic sensors used in geophysical well logging. Logging-while-drilling (LWD) tools are sensors typically used on the exploration of hydrocarbons reservoirs and are usually immersed in complex geophysical formations (inhomogeneous, dissipative, and anisotropic), resulting in a challenging problem for conventional computational electromagnetic techniques. The geophysical environment is typically treated as a radially and longitudinally stratified medium, conforming with the boundaries of a cylindrical borehole drilled in the earth. We analyzed this propagation problem by using a full-wave method based on the mode-matching technique for solving the cylindrical stratifications. This method was then supplemented by a perturbational solution on the grounds of the Born approximation for handling the non-symmetries the borehole and earth layers can present. Preliminary results show the ability of the techniques introduced in this paper to accurately modeling electromagnetic sensors more realistically when compared with other semi-analytic methods available in the literature.INDEX TERMS Born-based approximation, Mode-matching techniques, Full-wave techniques, Scattering, Well-logging sensors.

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“…Adopting a notation similar to that in [18], [33], the Maxwell's equations in an anisotropic media can be used to derive the vector wave equations…”

Section: A Electromagnetic Field Scattered By Anisotropic Objectmentioning

confidence: 99%

A Combined Mode-Matching Technique and Born Approximation Method to Model Well-Logging Sensors in Non-Axisymmetric Boreholes

2021

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“…This approach has the advantage to allows to petrophysicists to make decisions in real-time, reducing the operational costs, and optimizing the drilling operation. For these reasons, they become one of the most widely used techniques today and several works [2,4,17,24,25,26,27,28,29,30] have studied methods for its improvement.…”

Section: Electromagnetic Logging Tools and Techniquesmentioning

confidence: 99%

“…In [30] is presented a low-cost computational method for the analysis of the time-domain response of LWD sensors in complex soil formations. The mode matching technique (MMT) [28,30] is used in [25] as an efficient method to analyze the electromagnetic propagation in a model circular structures filled with complex materials, where it considers an uniaxially anisotropy to describes each layer of a stratified cylindrical waveguide. Also considering a uniaxial anisotropy, a perturbation method with a quite fast computational time is presented in [29] to model electromagnetic fields that describe LWD tools.…”

Section: Electromagnetic Logging Tools and Techniquesmentioning

confidence: 99%

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Study of the Electromagnetic Propagation in Stratified Anisotropic Media via Semi-Analytical Methods

HERNANDEZ¹

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Firstly, I would like to thank to my family, and in a very special way to my parents and my sister for always being present despite the distance. They are my reason I wake up stronger every day and I continue this difficult journey without them. I wish to thank to my husband, Emilio, for being my main support, for walking beside me at all times, for his dedication and unconditional love, simply my best friend. I am very grateful to my advisor, Professor Guilherme Simon da Rosa, for his wisdom and patience, for sharing his knowledge and teaching me tirelessly, for being the light and backbone of this work. This goal would not have been possible without his unconditional guide. It has been a great pleasure working with him. I would like to thank to all my friends and colleagues for supporting me in one or another way, especially to Adila, David, Randy, Julio, Dayrene, Adrián, Reinier, Johnes, Yoiz and Pedro. I want to thank to CETUC and all its professors and workers for giving me a warm welcome and make me feel at home. I would like to thank to PUC-Rio for the exemption of school fees offered by the Programa de Pós-Graduação em Engenharia Elétrica. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)-Finance Code 001.

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“…In many mode-matching solutions for modeling LWD tools, such those in [37,66,67], the source is usually an infinitesimal magnetic dipole. More sophisticated approaches consider a delta-type coil current source [5,21,25,68,69]. To the best of our knowledge, there is no report of any analytical or semi-analytical methodology for computing the influence of the finite size of a realistic LWD antenna.…”

Section: Introductionmentioning

confidence: 99%

Some Novel Full-Wave, Variational, and Perturbational Pseudo-Analytic Methods for Electromagnetic Propagation Modeling in Complex Geophysical Formations

PATIÑO¹

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A Comparison of Two Numerical Mode-Matching Methodologies for the Analysis of Inhomogeneous Media With Radial and Vertical Stratifications

Cited by 12 publications

References 30 publications

A Combined Mode-Matching Technique and Born Approximation Method to Model Well-Logging Sensors in Non-Axisymmetric Boreholes

A Combined Mode-Matching Technique and Born Approximation Method to Model Well-Logging Sensors in Non-Axisymmetric Boreholes

Study of the Electromagnetic Propagation in Stratified Anisotropic Media via Semi-Analytical Methods

Some Novel Full-Wave, Variational, and Perturbational Pseudo-Analytic Methods for Electromagnetic Propagation Modeling in Complex Geophysical Formations

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