Paper Info
Title
Cylindrical FDTD Analysis of LWD Tools Through Anisotropic Dipping-Layered Earth Media
Abstract
Electrical logging-while-drilling (LWD) tools are commonly used in oil and gas exploration to estimate the conductivity (resistivity) of adjacent Earth media. In general, Earth media exhibit anisotropic conductivities. This implies that when LWD tools are used for deviated and horizontal drilling, the resulting borehole problem may include dipping-layered media with dipping beds having full 3 times 3 conductivity tensors. To model this problem, we describe a 3-D cylindrical finite-difference time-domain (FDTD) algorithm extended to fully anisotropic conductive media and implemented with cylindrical perfectly matched layers to mimic open-domain problems. The 3-D FDTD algorithm is validated against analytical results in simple formations, showing good agreement, and used to simulate the response of LWD tools through anisotropic dipping beds for various values of anisotropic conductivities and dipping angles
Year
DOI
Venue
2007
10.1109/TGRS.2006.888139
IEEE T. Geoscience and Remote Sensing
Keywords
Field
DocType
lwd tools,logging-while-drilling lwd tools,well logging,finite-difference time-domain (fdtd) method,logging-while-drilling (lwd) tools,geophysical prospecting,dipping angles,well logging.,anisotropy,magnetic anisotropy,finite-difference time-domain fdtd method,anisotropic dipping-layered earth media,terrestrial electricity,gas exploration,finite-difference time-domain algorithm,cylindrical fdtd analysis,conductivity,borehole problems,index terms—anisotropy,resistivity,oil exploration,finite difference time-domain analysis,electrical logging-while-drilling tools,anisotropic dipping beds,anisotropic conductive media,perfectly matched layer,oil and gas,finite difference time domain
Conductivity,Anisotropy,Mineralogy,Remote sensing,Cylinder,Electrical conductor,Borehole,Finite-difference time-domain method,Well logging,Geometry,Electrical resistivity and conductivity,Mathematics
Journal
Volume
Issue
ISSN
45
2
0196-2892
Citations 
PageRank 
References 
14
1.11
7
Authors
2
Name
Order
Citations
PageRank
Hwa Ok Lee1221.79
Fernando L. Teixeira29716.97