Title :
An Efficient FDTD Method for Axially Symmetric LWD Environments
Author :
Wu, Dagang ; Chen, Ji ; Liu, Ce Richard
Author_Institution :
Dept. of Electr. & Comput. Eng., Houston Univ., Houston, TX
fDate :
6/1/2008 12:00:00 AM
Abstract :
In this paper, an unconditionally stable finite- difference time-domain (FDTD) method in cylindrical coordinates is developed to analyze electromagnetic responses under axially symmetric measure-while-drilling/logging-while-drilling (MWD/LWD) environments. The method is based on the application of the Crank-Nicholson scheme to the FDTD method in cylindrical coordinates. To accelerate the solution of this approach, an algebraic multigrid method is applied. For several MWD/LWD electromagnetic simulations, it is observed that the proposed method can be close to 20 times faster than the conventional FDTD method.
Keywords :
finite difference time-domain analysis; geophysics computing; grid computing; oil drilling; well logging; Crank-Nicholson scheme; algebraic multigrid method; cylindrical coordinates; electromagnetic responses; finite-difference time-domain method; logging-while-drilling; measure-while-drilling; Finite-difference time-domain (FDTD) method; logging while drilling (LWD); multigrid technique; unconditionally stable algorithm; well logging;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2008.916202
