Title :
A three-dimensional transmission line matrix method (TLM) for simulations of logging tools
Author :
Li, Jing ; Liu, Ce
Author_Institution :
Electromagn. Inst., Southwest Jiaotong Univ., China
fDate :
7/1/2000 12:00:00 AM
Abstract :
A three-dimensional (3-D) transmission line matrix method (TLM) in cylindrical coordinates for the simulation of logging tools is formulated and programmed. The radiation properties of a coil-type antenna in a conductive medium are analyzed and simulated with TLM formulations. The symmetrical condensed nodes (SCN) are adopted. This algorithm can be applied to both induction and measuring-while-drilling (MWD) tools in both the time and frequency domains, and the formation can be anisotropic. Perfectly matched layer (PML) absorbing boundary conditions are used to simulate an infinite boundary in real logging situations. Verifications and some examples are presented
Keywords :
absorbing media; antenna radiation patterns; frequency-domain analysis; geophysical techniques; time-domain analysis; transmission line matrix methods; TLM formulations; coil-type antenna; conductive medium; cylindrical coordinates; frequency domain; induction tools; infinite boundary; logging tools; measuring-while-drilling tools; perfectly matched layer absorbing boundary conditions; radiation properties; symmetrical condensed nodes; three-dimensional transmission line matrix method; time domain; Analytical models; Antenna measurements; Boundary conditions; Electromagnetic scattering; Frequency domain analysis; Frequency measurement; Nonhomogeneous media; Time measurement; Transmission line matrix methods; Transmission line measurements;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
