Background noise estimation using outer product expansion for ELF electromagnetic wave signal

2009 ◽  
Author(s):  
Akitoshi Itai ◽  
Hiroshi Yasukawa ◽  
Ichi Takumi ◽  
Masayasu Hata
Keyword(s):  
Electromagnetic Wave ◽  
Background Noise ◽  
Noise Estimation ◽  
Outer Product ◽  
Wave Signal

Numerical simulation of azimuth electromagnetic wave tool response based on self-adaptive FEM

2017 ◽  
Vol 31 (19-21) ◽  
pp. 1740029 ◽  
Author(s):  
Hui Li ◽  
Yi-Ze Shen
Keyword(s):  
Numerical Simulation ◽  
Electromagnetic Wave ◽  
Data Interpretation ◽  
Adaptive Finite Element Method ◽  
Adaptive Finite Element ◽  
Wave Signal ◽  
Imaging Tool ◽  
Geological Conditions ◽  
Wave Imaging ◽  
Self Adaptive

Azimuth electromagnetic wave is a new type of electromagnetic prospecting technology. It can detect weak electromagnetic wave signal and realize real-time formation conductivity imaging. For effectively optimizing measurement accuracy of azimuth electromagnetic wave imaging tool, the efficient numerical simulation algorithm is required. In this paper, self-adaptive finite element method (FEM) has been used to investigate the azimuth electromagnetic wave logging tool response by adjusting antenna array system in different geological conditions. Numerical simulation examples show the accuracy and efficiency of the method, and provide physical interpretation of amplitude attenuation and phase shift of electromagnetic wave signal. Meanwhile, the high-accuracy numerical simulation results have great value to azimuth electromagnetic wave imaging tool calibration and data interpretation.

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