High Precision Time Domain Forward Modeling for Crosshole Electromagnetic Tomography  

作　　者：林树海 赵立英 

机构地区：[1]Key Laboratory of Geo-detection (China University of Geosciences,Beijing), Ministry of Education [2]State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China [3]School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China [4]Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [5]School of Applied Science,University of Science and Technology Beijing

出　　处：《Journal of China University of Geosciences》2007年第4期320-325,共6页中国地质大学学报（英文版）

基　　金：This paper is supported by the Focused Subject Program of Beijing (No. XK104910598);Foundation for Returned Students of Ministry of Education, and Foundation of China University of Geosciences (Beijing).

摘　　要：To improve the resolution of crosshole electromagnetic tomography, high precision of forward modeling is necessary. A pseudo-spectral time domain （PSTD） forward modeling was used to simulate electromagnetic wave propagation between two boreholes. The PSTD algorithm is based on the finite difference time domain （FDTD） method and uses the fast Fourier transform （FFT） algorithm for spatial derivatives in Maxwell＇s equations. Besides having the strongpoint of the FDTD method, the calculation precision of the PSTD algorithm is higher than that of the FDTD method under the same calculation condition. The forward modeling using the PSTD method will play an important role in enhancing the resolution of crosshole electromagnetic tomography.To improve the resolution of crosshole electromagnetic tomography, high precision of forward modeling is necessary. A pseudo-spectral time domain （PSTD） forward modeling was used to simulate electromagnetic wave propagation between two boreholes. The PSTD algorithm is based on the finite difference time domain （FDTD） method and uses the fast Fourier transform （FFT） algorithm for spatial derivatives in Maxwell＇s equations. Besides having the strongpoint of the FDTD method, the calculation precision of the PSTD algorithm is higher than that of the FDTD method under the same calculation condition. The forward modeling using the PSTD method will play an important role in enhancing the resolution of crosshole electromagnetic tomography.

关 键 词：finite difference time domain method pseudo.spectral time domain algorithm forward modeling tomography. 

分 类 号：P631.3[天文地球—地质矿产勘探]