Publication

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

View document

Bibliographic Details
Summary: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.
Main Authors:Rosa,Guilherme S.
Other Authors:Bergmann,José R.; Teixeira,Fernando L.
Subject:Anisotropic media mode matching methods stratified media well logging tools
Year:2017
Country:Brazil
Document type:article
Access type:open access
Associated institution:IBICT
Language:English
Origin:Oasisbr

Similar Items

Funded activities

No funded projects found.

Similar Items